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Grossi AA, Tian C, Ren M, Zou F, Gustafsson DR. Co-phylogeny of a hyper-symbiotic system: Endosymbiotic bacteria (Gammaproteobacteria), chewing lice (Insecta: Phthiraptera) and birds (Passeriformes). Mol Phylogenet Evol 2024; 190:107957. [PMID: 37914031 DOI: 10.1016/j.ympev.2023.107957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 10/23/2023] [Accepted: 10/26/2023] [Indexed: 11/03/2023]
Abstract
Chewing lice are hosts to endosymbiotic bacteria as well as themselves being permanent parasites. This offers a unique opportunity to examine the cophylogenetic relationships between three ecologically interconnected organismal groups: birds, chewing lice, and bacteria. Here, we examine the cophylogenetic relationships between lice in the genus Guimaraesiella Eichler, 1949, their endosymbiotic Sodalis-allied bacteria, and a range of bird species from across South China. Both event and distance-based cophylogenetic analyses were explored to compare phylogenies of the three organismal groups. Pair-wise comparisons between lice-endosymbionts and bird-endosymbionts indicated that their evolutionary histories are not independent. However, comparisons between lice and birds, showed mixed results; the distance-based method of ParaFit indicated that their evolutionary histories are not independent, while the event-based method of Jane indicated that their phylogenies were no more congruent than expected by chance. Notably, louse host-switching does not seem to have affected bacterial strains, as conspecific lice sampled from distantly related hosts share bacteria belonging to the same clade.
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Affiliation(s)
- Alexandra A Grossi
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Library of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang West Road, Haizhu District, Guangzhou 510260, Guangdong Province, China.
| | - Chunpo Tian
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Library of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang West Road, Haizhu District, Guangzhou 510260, Guangdong Province, China; College of Life Sciences, Shaanxi Normal University, 620 West Chang'an Street, Chang'an District, Xi'an City 710119, Shaanxi Province, China.
| | - Mengjiao Ren
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Library of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang West Road, Haizhu District, Guangzhou 510260, Guangdong Province, China; College of Biology and Environmental Science, Jishou University, 120 Renmin Road, Jishou 416000, Hunan Province, China.
| | - Fasheng Zou
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Library of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang West Road, Haizhu District, Guangzhou 510260, Guangdong Province, China.
| | - Daniel R Gustafsson
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Library of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang West Road, Haizhu District, Guangzhou 510260, Guangdong Province, China.
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Brewer PJ, Sweet AD. Prevalence and diversity of parasitic bird lice (Insecta: Psocodea) in northeast Arkansas. Int J Parasitol Parasites Wildl 2023; 22:205-215. [PMID: 37941681 PMCID: PMC10628595 DOI: 10.1016/j.ijppaw.2023.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/03/2023] [Accepted: 06/21/2023] [Indexed: 11/10/2023]
Abstract
Many groups of parasites lack basic information on biodiversity and host associations, which poses challenges for conservation and understanding the ecological relationships between hosts and their parasites. This gap in knowledge is particularly relevant for parasitic species with obscure lifestyles. Ectoparasitc bird lice (Insecta: Psocodea: Phthiraptera) are a group of parasites that has received a relatively substantial research focus, yet patterns of bird-louse relationships and louse diversity remain understudied in many geographic regions, including in parts of the southeastern United States. In this study, we assessed the diversity, prevalence, abundance, and intensity of lice from live and salvaged birds in northeastern Arkansas. We also focused on the frequency of co-occurrence of lice and symbiotic feather mites. Finally, we used nuclear and mitochondrial genes to assess the phylogenic relationships among the most common genera of lice in our sample. We found a total louse prevalence of 10.57% with the highest prevalence on the Passeriformes families Turdidae, Passerellidae, and Parulidae. We also found the louse genera Myrsidea and Brueelia to be the most prevalent and abundant in our sample. Additionally, we reported several novel associations among well-studied bird species. We also found that louse phylogenic patterns tend to reflect host taxonomy and/or ecology. Overall, our results provide important insight into the biodiversity, community structure, and host interactions of parasitic lice from North American birds.
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Affiliation(s)
- Paige J. Brewer
- Department of Biological Sciences, Arkansas State University, Jonesboro, AR, United States
| | - Andrew D. Sweet
- Department of Biological Sciences, Arkansas State University, Jonesboro, AR, United States
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3
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Springer A, Durden LA, Kiene F, Klein A, Rakotondravony R, Ehlers J, Greiman SE, Blanco MB, Zohdy S, Kessler SE, Strube C, Radespiel U. Molecular phylogenetics of the sucking louse genus Lemurpediculus (Insecta: Phthiraptera), ectoparasites of lemurs, with descriptions of three new species. Int J Parasitol Parasites Wildl 2023; 20:138-152. [PMID: 36845223 PMCID: PMC9945782 DOI: 10.1016/j.ijppaw.2023.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023]
Abstract
Sucking lice live in intimate association with their hosts and often display a high degree of host specificity. The present study investigated sucking lice of the genus Lemurpediculus from six mouse lemur (Microcebus) and two dwarf lemur (Cheirogaleus) species endemic to the island of Madagascar, considered a biodiversity hotspot. Louse phylogenetic trees were created based on cytochrome C oxidase subunit I (COI), elongation factor 1α (EF1α) and internal transcribed spacer 1 (ITS1) sequences. While clustering according to host species was generally observed for COI and ITS1, suggesting high host specificity of the examined lice, EF1α sequences alone did not distinguish between lice of different Microcebus species, possibly due to rather recent divergence. As bootstrap support for basal tree structure was rather low, further data are necessary to resolve the evolutionary history of louse-mouse lemur associations. Three new species of sucking lice are described: Lemurpediculus zimmermanni sp. Nov. From Microcebus ravelobensis, Lemurpediculus gerpi sp.nov. from Microcebus gerpi, and Lemurpediculus tsimanampesotsae sp. nov. from Microcebus griseorufus. These new species are compared with all known congeneric species and identifying features are illustrated for all known species of Lemurpediculus.
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Affiliation(s)
- Andrea Springer
- Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hanover, Germany
| | - Lance A. Durden
- Department of Biology, Georgia Southern University, 4324 Old Register Road, Statesboro, GA, 30458, USA
| | - Frederik Kiene
- Institute of Zoology, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hannover, Germany,Clinic for Swine and Small Ruminants, Forensic Medicine and Ambulatory Service, University of Veterinary Medicine Hannover, 30173, Hannover, Germany
| | - Annette Klein
- Institute of Zoology, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hannover, Germany
| | - Romule Rakotondravony
- École Doctorale Ecosystèmes Naturels (EDEN), University of Mahajanga, 5 Rue Georges V - Immeuble KAKAL, Mahajanga Be, B.P. 652, Mahajanga 401, Madagascar,Faculté des Sciences, de Technologies et de l’Environnement, University of Mahajanga, 5 Rue Georges V - Immeuble KAKAL, Mahajanga Be, B.P. 652. Mahajanga 401, Madagascar
| | - Julian Ehlers
- Animal Ecology and Conservation, Institute of Cell and Systems Biology of Animals, University of Hamburg, Martin-Luther-King-Platz 3, 20146, Hamburg, Germany
| | - Stephen E. Greiman
- Department of Biology, Georgia Southern University, 4324 Old Register Road, Statesboro, GA, 30458, USA
| | - Marina B. Blanco
- Duke Lemur Center, Durham, NC, 27705, USA,Department of Biology, Duke University, Durham, NC, 27708, USA
| | - Sarah Zohdy
- School of Forestry and Wildlife Sciences, 602 Duncan Drive, Auburn, AL, 36849, USA
| | - Sharon E. Kessler
- Department of Psychology, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, Scotland, UK
| | - Christina Strube
- Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hanover, Germany,Corresponding author.
| | - Ute Radespiel
- Institute of Zoology, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hannover, Germany,Corresponding author.
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Detailed morphological structure and phylogenetic relationships of Degeeriella punctifer (Phthiraptera: Philopteridae), a parasite of the bearded vulture Gypaetus barbatus (Accipitriformes: Accipitridae). Sci Rep 2023; 13:512. [PMID: 36627350 PMCID: PMC9832001 DOI: 10.1038/s41598-023-27774-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023] Open
Abstract
Habitat loss is one of the main threats to species survival and, in the case of parasites, it is their hosts that provide their habitat. Therefore, extinction even at local scale of host taxa also implies the extinction of their parasites in a process known as co-extinction. This is the case of the bearded vulture (Gypaetus barbatus), which almost became extinct at the beginning of the twentieth century. After several attempts, this species was successfully reintroduced into the Alps at the end of the twentieth century. We collected 25 lice specimens from an electrocuted bearded vulture from Susa (Italian Alps) that were morphologically identified as Degeeriella punctifer. Six individuals were studied by scanning electron microscopy, with particular emphasis on their cephalic sensorial structures, while four further specimens were characterized at molecular level by amplifying partial regions of the 12SrRNA, COX1 and elongation factor 1 alpha (EF-1) genes. From a morphological perspective, the number, type and arrangement of the sensillae on the two distal antennal segments is quite similar to that of other species of the family Philopteridae (Phthiraptera: Ischnocera). The mandibles and tarsal claws allow lice to cling firmly to their host's feathers. Phylogenetic analyses help unravel the paraphyletic nature of the genus Degeeriella and demonstrate the clear differentiation between lice parasitizing Accipitriformes and Falconiformes, as well as the close relationship between D. punctifer, D. fulva, D. nisus and Capraiella sp. that, along with other genera, parasitize rollers (Aves: Coraciiformes).
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Alotaibi NJ, Al-Turaiki IM, Alajmi R, Fouzi B, Amjad Bashir M, Almusawi Z, Metwally DM, Alzarzor Alajami MA, Alajmi FE, Nasser MG. Molecular Identification of Newly Recorded Louse Columbicola tschulyschman Eichler (Phthiraptera: Philopteridae) From Saudi Arabia With a Note on Genus Columbicola spp. Phylogeny. JOURNAL OF MEDICAL ENTOMOLOGY 2022; 59:1980-1985. [PMID: 36151853 DOI: 10.1093/jme/tjac136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Indexed: 06/16/2023]
Abstract
Chewing lice comprise a large group of ectoparasites that colonize and adversely affect several domestic and wild birds including pigeons. In Saudi Arabia, there is a lack of studies describing such ectoparasites and their infestation rates. Through this work, a new record, Columbicola, tschulyschman Eichler (C. tschulyschman Eichler) was collected from domestic pigeons (Columba livia domestica, Linnaeus). The collected C. tschulyschman Eichler was morphologically identified based on specific taxonomic keys. Mitochondrial (COI) and nuclear (EF-1α) gene fragments were used for molecular identification and phylogenetic reconstruction. In this study, the C. tschulyschman Eichler accounted for around 69.40%. To our knowledge, this is the first report of C. tschulyschman Eichler in Riyadh, Saudi Arabia. To improve the tree topology and differentiate between genera, further studies should utilize the 16s rRNA.
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Affiliation(s)
- Noura J Alotaibi
- Department of Biology, Faculty of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Isra M Al-Turaiki
- Department of Information Technology, College of Computer and Information Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Reem Alajmi
- Department of Zoology, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Boulkenafet Fouzi
- Department of Natural Sciences and Life University of 20th August 1955, Skikda, Algeria
| | - Muhammad Amjad Bashir
- Department of Plant Protection, Faculty of Agricultural Science Ghazi University, Dera Ghazi Khan, Pakistan
| | - Zainab Almusawi
- Department of Zoology, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Dina M Metwally
- Department of Parasitology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt
| | | | - Fatemah E Alajmi
- Department of Biology, College of Science, Hafr Al Batin University, Hafr Al Batin 31991, Saudi Arabia
| | - Mohamed G Nasser
- Department of Entomology, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
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6
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Kolencik S, Johnson KP, Grant AR, Valim MP, Kuabara KMD, Weckstein JD, Allen JM. Molecular phylogenetics of the avian feather louse Philopterus-complex (Phthiraptera: Philopteridae). Mol Phylogenet Evol 2022; 174:107556. [PMID: 35738542 DOI: 10.1016/j.ympev.2022.107556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/19/2022] [Accepted: 05/27/2022] [Indexed: 11/30/2022]
Abstract
The avian feather louse Philopterus-complex (Phthiraptera: Ischnocera: Philopteridae) currently contains 12 genera that have been grouped together because of shared morphological characteristics. Although previously lumped into a single genus (Philopterus), more recent morphological treatments have separated the group into several different genera. Here we evaluate the status of these genera using DNA sequence data from 118 ingroup specimens belonging to ten genera in the Philopterus-complex: Australophilopterus Mey, 2004, Cinclosomicola Mey 2004, Clayiella Eichler, 1940, Corcorides Mey, 2004, Mayriphilopterus Mey, 2004, Paraphilopterus Mey 2004, Philopteroides Mey 2004, Philopterus Nitzsch, 1818, Tyranniphilopterus Mey, 2004, and Vinceopterus Gustafsson, Lei, Chu, Zou, and Bush, 2019. Our sampling includes 97 new louse-host association records. Our analyses suggest that the genus Debeauxoecus Conci, 1941, parasitic on pittas (Aves: Pittidae), is outside of the Philopterus-complex, and that there is strong support for the monophyly of a group containing the remaining genera from the complex. Some diverse genera, such as Philopterus (sensu stricto) and Mayriphilopterus are supported as monophyletic, whereas the genera Australophilopterus, Philopteroides, and Tyranniphilopterus are not. The present study is the largest phylogenetic reconstruction of avian lice belonging to the Philopterus-complex to date and suggests that further generic revision is needed in the group to integrate molecular and morphological information.
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Affiliation(s)
- Stanislav Kolencik
- Department of Biology, University of Nevada, Reno, 1664 N. Virginia Street, Reno, NV 89557, USA.
| | - Kevin P Johnson
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana Champaign, Champaign, IL 61820, USA
| | - Avery R Grant
- Department of Biology, University of Nevada, Reno, 1664 N. Virginia Street, Reno, NV 89557, USA
| | - Michel P Valim
- Universidade Iguaçu, Nova Iguaçu, Rio de Janeiro 28300-000, Brazil
| | - Kamila M D Kuabara
- Department of Ornithology, Academy of Natural Sciences of Drexel University and Department of Biodiversity, Earth, and Environmental Sciences, Drexel University, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA
| | - Jason D Weckstein
- Department of Ornithology, Academy of Natural Sciences of Drexel University and Department of Biodiversity, Earth, and Environmental Sciences, Drexel University, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA
| | - Julie M Allen
- Department of Biology, University of Nevada, Reno, 1664 N. Virginia Street, Reno, NV 89557, USA
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7
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André MR, Neupane P, Lappin M, Herrin B, Smith V, Williams TI, Collins L, Bai H, Jorge GL, Balbuena TS, Bradley J, Maggi RG, Breitschwerdt EB. Using Proteomic Approaches to Unravel the Response of Ctenocephalides felis felis to Blood Feeding and Infection With Bartonella henselae. Front Cell Infect Microbiol 2022; 12:828082. [PMID: 35155282 PMCID: PMC8831700 DOI: 10.3389/fcimb.2022.828082] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/07/2022] [Indexed: 01/19/2023] Open
Abstract
Among the Ctenocephalides felis felis-borne pathogens, Bartonella henselae, the main aetiological agent of cat scratch disease (CSD), is of increasing comparative biomedical importance. Despite the importance of B. henselae as an emergent pathogen, prevention of the diseases caused by this agent in cats, dogs and humans mostly relies on the use of ectoparasiticides. A vaccine targeting both flea fitness and pathogen competence is an attractive choice requiring the identification of flea proteins/metabolites with a dual effect. Even though recent developments in vector and pathogen -omics have advanced the understanding of the genetic factors and molecular pathways involved at the tick-pathogen interface, leading to discovery of candidate protective antigens, only a few studies have focused on the interaction between fleas and flea-borne pathogens. Taking into account the period of time needed for B. henselae replication in flea digestive tract, the present study investigated flea-differentially abundant proteins (FDAP) in unfed fleas, fleas fed on uninfected cats, and fleas fed on B. henselae-infected cats at 24 hours and 9 days after the beginning of blood feeding. Proteomics approaches were designed and implemented to interrogate differentially expressed proteins, so as to gain a better understanding of proteomic changes associated with the initial B. henselae transmission period (24 hour timepoint) and a subsequent time point 9 days after blood ingestion and flea infection. As a result, serine proteases, ribosomal proteins, proteasome subunit α-type, juvenile hormone epoxide hydrolase 1, vitellogenin C, allantoinase, phosphoenolpyruvate carboxykinase, succinic semialdehyde dehydrogenase, glycinamide ribotide transformylase, secreted salivary acid phosphatase had high abundance in response of C. felis blood feeding and/or infection by B. henselae. In contrast, high abundance of serpin-1, arginine kinase, ribosomal proteins, peritrophin-like protein, and FS-H/FSI antigen family member 3 was strongly associated with unfed cat fleas. Findings from this study provide insights into proteomic response of cat fleas to B. henselae infected and uninfected blood meal, as well as C. felis response to invading B. henselae over an infection time course, thus helping understand the complex interactions between cat fleas and B. henselae at protein levels.
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Affiliation(s)
- Marcos Rogério André
- Laboratory of Immunoparasitology, Department of Pathology, Reproduction and One Health, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (FCAV/UNESP), Jaboticabal, Brazil
- Intracellular Pathogens Research Laboratory, Department of Clinical Sciences, The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Pradeep Neupane
- Intracellular Pathogens Research Laboratory, Department of Clinical Sciences, The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Michael Lappin
- Department of Clinical Sciences, Center for Companion Animal Studies, Colorado State University, Fort Collins, CO, United States
| | - Brian Herrin
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, United States
| | - Vicki Smith
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, United States
| | - Taufika Islam Williams
- Department of Chemistry, North Carolina State University, Raleigh, NC, United States
- Molecular Education, Technology and Research Innovation Center (METRIC), North Carolina State University, Raleigh, NC, United States
| | - Leonard Collins
- Molecular Education, Technology and Research Innovation Center (METRIC), North Carolina State University, Raleigh, NC, United States
| | - Hongxia Bai
- Department of Chemistry, North Carolina State University, Raleigh, NC, United States
- Molecular Education, Technology and Research Innovation Center (METRIC), North Carolina State University, Raleigh, NC, United States
| | - Gabriel Lemes Jorge
- Departmento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (FCAV/UNESP), Jaboticabal, Brazil
| | - Tiago Santana Balbuena
- Departmento de Biotecnologia Agropecuária e Ambiental, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (FCAV/UNESP), Jaboticabal, Brazil
| | - Julie Bradley
- Intracellular Pathogens Research Laboratory, Department of Clinical Sciences, The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Ricardo G. Maggi
- Intracellular Pathogens Research Laboratory, Department of Clinical Sciences, The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Edward B. Breitschwerdt
- Intracellular Pathogens Research Laboratory, Department of Clinical Sciences, The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
- *Correspondence: Edward B. Breitschwerdt,
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8
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Chen J, Peng Y, Zhang H, Wang K, Tang Y, Gao J, Zhao C, Zhu G, Palli SR, Han Z. Transcript level is a key factor affecting RNAi efficiency. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 176:104872. [PMID: 34119217 DOI: 10.1016/j.pestbp.2021.104872] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/26/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
Efficiency is the basis for the application of RNA interference (RNAi) technology. Actually, RNAi efficiency varies greatly among insect species, tissues and genes. Previous efforts have revealed the mechanisms for variation among insect species and tissues. Here, we investigated the reason for variable efficiency among the target genes in the same insect. First, we tested the genes sampled randomly from Tribolium castaneum, Locusta migratoria and Drosophila S2 cells for both their expression levels and sensitivity to RNAi. The results indicated that the genes with higher expression levels were more sensitive to RNAi. Statistical analysis showed that the correlation coefficients between transcript levels and knockdown efficiencies were 0.8036 (n = 90), 0.7255 (n = 18) and 0.9505 (n = 13), respectively in T. castaneum, L. migratoria and Drosophila S2 cells. Subsequently, ten genes with varied expression level in different tissues (midgut and carcass without midgut) of T. castaneum were tested. The results indicated that the higher knockdown efficiency was always obtained in the tissue where the target gene expressed higher. In addition, three genes were tested in different developmental stages, larvae and pupae of T. castaneum. The results found that when the expression level increased after insect pupation, these genes became more sensitive to RNAi. Thus, all the proofs support unanimously that transcript level is a key factor affecting RNAi sensitivity. This finding allows for a better understanding of the RNAi efficiency variation and lead to effective or efficient use of RNAi technology.
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Affiliation(s)
- Jiasheng Chen
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Yingchuan Peng
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Institute of Entomology, Jiangxi Agricultural University, Nanchang 330045, China
| | - Hainan Zhang
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Kangxu Wang
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Grains and Oils Quality Control and Processing, College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210046, China
| | - Yujie Tang
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Jing Gao
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Chunqing Zhao
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Guanheng Zhu
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY 40546, USA; School of Agriculture, Sun Yat-Sen University, Shenzhen 518107,China
| | - Subba Reddy Palli
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY 40546, USA
| | - Zhaojun Han
- The Key Laboratory of Monitoring and Management of Plant Diseases and Insects / Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
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9
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Antonello M, Menna-Barreto RFS, Leles D, Pires JR, Brener B. Chewing Lice of Fregata magnificens with First Record of Fregatiella aurifasciata (Phthiraptera: Amblycera) in Brazil. J Parasitol 2021; 106:828-834. [PMID: 33351946 DOI: 10.1645/19-184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The genus Fregata includes 5 species, with 3 recorded in Brazil, with Fregata magnificens being the most abundant. However, its ectoparasitic fauna is still little known. This study aimed to evaluate the incidence of ectoparasites of F. magnificens residing along the coast of Rio de Janeiro and São Paulo collected by 2 animal rehabilitation centers. Samples were collected from 5 frigatebirds of the Instituto Argonauta in São Paulo and 10 frigatebirds of the Centro de Recuperação de Animais Selvagens (CRAS) in Rio de Janeiro. Species of lice were identified using both morphological and molecular methods. Scanning electron microscopy was also used for identification. Colpocephalum spineum, Fregatiella aurifasciata, and Pectinopygus fregatiphagus were identified. All 3 louse species have previously been recorded from this host outside Brazil, but only P. fregatiphagus has been recorded from Brazil. This paper reports the first occurrence of F. aurifasciata and C. spineum in Brazil. It is also the first record of P. fregatiphagus in the state of Rio de Janeiro.
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Affiliation(s)
- Magda Antonello
- Departamento de Microbiologia e Parasitologia, Instituto Biomédico, UFF, 24210-130, Niterói, RJ, Brazil
| | - Rubem F S Menna-Barreto
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, FIOCRUZ, 21040-360, Rio de Janeiro, RJ, Brazil
| | - Daniela Leles
- Departamento de Microbiologia e Parasitologia, Instituto Biomédico, UFF, 24210-130, Niterói, RJ, Brazil
| | - J R Pires
- Centro de Recuperação de Animais Selvagens, Estácio, Campus Vargem Pequena, 22783-325, Rio de Janeiro, RJ, Brazil
| | - Beatriz Brener
- Departamento de Microbiologia e Parasitologia, Instituto Biomédico, UFF, 24210-130, Niterói, RJ, Brazil
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10
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Najer T, Papousek I, Sychra O, Sweet AD, Johnson KP. Combining Nuclear and Mitochondrial Loci Provides Phylogenetic Information in the Philopterus Complex of Lice (Psocodea: Ischnocera: Philopteridae). JOURNAL OF MEDICAL ENTOMOLOGY 2021; 58:252-260. [PMID: 32829404 DOI: 10.1093/jme/tjaa166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Indexed: 06/11/2023]
Abstract
The Philopterus Complex includes several lineages of lice that occur on birds. The complex includes the genera Philopterus (Nitzsch, 1818; Psocodea: Philopteridae), Philopteroides (Mey, 2004; Psocodea: Philopteridae), and many other lineages that have sometimes been regarded as separate genera. Only a few studies have investigated the phylogeny of this complex, all of which are based on morphological data. Here we evaluate the utility of nuclear and mitochondrial loci for recovering the phylogeny within this group. We obtained phylogenetic trees from 39 samples of the Philopterus Complex (Psocodea: Philopteridae), using sequences of two nuclear (hyp and TMEDE6) and one mitochondrial (COI) marker. We evaluated trees derived from these genes individually as well as from concatenated sequences. All trees show 20 clearly demarcated taxa (i.e., putative species) divided into five well-supported clades. Percent sequence divergence between putative species (~5-30%) for the COI gene tended to be much higher than those for the nuclear genes (~1-15%), as expected. In cases where species are described, the lineages identified based on molecular divergence correspond to morphologically defined species. In some cases, species that are host generalists exhibit additional underlying genetic variation and such cases need to be explored by further future taxonomic revisions of the Philopterus Complex.
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Affiliation(s)
- Tomas Najer
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka, Prague, Czechia
| | - Ivo Papousek
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences, Palackeho, Brno, Czechia
| | - Oldrich Sychra
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences, Palackeho, Brno, Czechia
| | - Andrew D Sweet
- Department of Entomology, Purdue University, West Lafayette, IN
| | - Kevin P Johnson
- Illinois Natural History Survey, University of Illinois, Champaign, IL
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11
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Durden LA, Kessler SE, Boundenga L, Ngoubangoye B, Tsoumbou TA, Moussadji-Kinga CI, Halbwax M, Setchell JM, Nichols J, Greiman SE. A New Species of Sucking Louse from the Mandrill from Gabon with a Review of Host Associations and Geographical Distributions, and Identification Keys to Members of the Genus pedicinus (Phthiraptera: Anoplura: Pedicinidae). J Parasitol 2020; 106:221-232. [PMID: 32164028 DOI: 10.1645/19-170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Members of the sucking louse genus Pedicinus are ectoparasites of cercopithecid primates in Africa, Asia, and Gibraltar. Pedicinus gabonensis n. sp. is described on the basis of adult male and female specimens collected from the mandrill (Mandrillus sphinx) in Gabon. The new species is compared morphologically with other members of the genus Pedicinus, and a nuclear elongation factor 1 alpha gene sequence is provided. Host associations and geographical distributions of the 18 previously recognized species of the genus and of P. gabonensis n. sp. are reviewed. Updated identification keys are provided for males and females of all known valid species of Pedicinus.
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Affiliation(s)
- Lance A Durden
- Department of Biology, Georgia Southern University, Statesboro, Georgia 30458
| | - Sharon E Kessler
- University of Stirling, Department of Psychology, Faculty of Natural Sciences, Stirling FK9 4LA, Scotland.,Durham University, Department of Anthropology, Durham, DH1 3LE, U.K
| | - Larson Boundenga
- Centre de Primatologie, Centre International de Recherches Médicales de Franceville (CIRMF), B.P. 769 Franceville, Gabon
| | - Barthélemy Ngoubangoye
- Centre de Primatologie, Centre International de Recherches Médicales de Franceville (CIRMF), B.P. 769 Franceville, Gabon
| | - Thierry A Tsoumbou
- Centre de Primatologie, Centre International de Recherches Médicales de Franceville (CIRMF), B.P. 769 Franceville, Gabon
| | - Cyr I Moussadji-Kinga
- Centre de Primatologie, Centre International de Recherches Médicales de Franceville (CIRMF), B.P. 769 Franceville, Gabon
| | - Michel Halbwax
- Centre de Primatologie, Centre International de Recherches Médicales de Franceville (CIRMF), B.P. 769 Franceville, Gabon.,Agence Nationale des Parcs Nationaux, B.P. 20379, Libreville, Gabon
| | | | - Jennifer Nichols
- Durham University, Department of Anthropology, Durham, DH1 3LE, U.K
| | - Stephen E Greiman
- Department of Biology, Georgia Southern University, Statesboro, Georgia 30458
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12
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Gajdošová M, Sychra O, Kreisinger J, Sedláček O, Nana ED, Albrecht T, Munclinger P. Patterns of host-parasite associations in tropical lice and their passerine hosts in Cameroon. Ecol Evol 2020; 10:6512-6524. [PMID: 32724529 PMCID: PMC7381757 DOI: 10.1002/ece3.6386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/18/2020] [Accepted: 04/22/2020] [Indexed: 01/30/2023] Open
Abstract
Coevolutionary processes that drive the patterns of host-parasite associations can be deduced through congruence analysis of their phylogenies. Feather lice and their avian hosts have previously been used as typical model systems for congruence analysis; however, such analyses are strongly biased toward nonpasserine hosts in the temperate zone. Further, in the Afrotropical region especially, cospeciation studies of lice and birds are entirely missing. This work supplements knowledge of host-parasite associations in lice using cospeciation analysis of feather lice (genus Myrsidea and the Brueelia complex) and their avian hosts in the tropical rainforests of Cameroon. Our analysis revealed a limited number of cospeciation events in both parasite groups. The parasite-host associations in both louse groups were predominantly shaped by host switching. Despite a general dissimilarity in phylogeny for the parasites and hosts, we found significant congruence in host-parasite distance matrices, mainly driven by associations between Brueelia lice and passerine species of the Waxbill (Estrildidae) family, and Myrsidea lice and their Bulbul (Pycnonotidae) host species. As such, our study supports the importance of complex biotic interactions in tropical environments.
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Affiliation(s)
- Magdalena Gajdošová
- Department of ZoologyFaculty of ScienceCharles UniversityPragueCzech Republic
- Department of EcologyFaculty of ScienceCharles UniversityPragueCzech Republic
| | - Oldřich Sychra
- Department of Biology and Wildlife DiseasesFaculty of Veterinary Hygiene and EcologyUniversity of Veterinary and Pharmaceutical SciencesBrnoCzech Republic
| | - Jakub Kreisinger
- Department of ZoologyFaculty of ScienceCharles UniversityPragueCzech Republic
| | - Ondřej Sedláček
- Department of EcologyFaculty of ScienceCharles UniversityPragueCzech Republic
| | - Eric Djomo Nana
- Institute of Agricultural Research for Development (IRAD)Messa ‐YaoundéCameroon
| | - Tomáš Albrecht
- Department of ZoologyFaculty of ScienceCharles UniversityPragueCzech Republic
- Institute of Vertebrate BiologyCzech Academy of SciencesBrnoCzech Republic
| | - Pavel Munclinger
- Department of ZoologyFaculty of ScienceCharles UniversityPragueCzech Republic
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13
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Akankunda T, To H, Rodriguez Lopez C, Leijs R, Hogendoorn K. A method to generate multilocus barcodes of pinned insect specimens using MiSeq. Mol Ecol Resour 2020; 20. [PMID: 32104992 DOI: 10.1111/1755-0998.13143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/20/2020] [Accepted: 02/03/2020] [Indexed: 01/03/2023]
Abstract
For molecular insect identification, amplicon sequencing methods are recommended because they offer a cost-effective approach for targeting small sets of informative genes from multiple samples. In this context, high-throughput multilocus amplicon sequencing has been achieved using the MiSeq Illumina sequencing platform. However, this approach generates short gene fragments of <500 bp, which then have to be overlapped using bioinformatics to achieve longer sequence lengths. This increases the risk of generating chimeric sequences or leads to the formation of incomplete loci. Here, we propose a modified nested amplicon sequencing method for targeting multiple loci from pinned insect specimens using the MiSeq Illumina platform. The modification exists in using a three-step nested PCR approach targeting near full-length loci in the initial PCR and subsequently amplifying short fragments of between 300 and 350 bp for high-throughput sequencing using Illumina chemistry. Using this method, we generated 407 sequences of three loci from 86% of all the specimens sequenced. Out of 103 pinned bee specimens of replicated species, 71% passed the 95% sequence similarity threshold between species replicates. This method worked best for pinned specimens aged between 0 and 5 years, with a limit of 10 years for pinned and 14 years for ethanol-preserved specimens. Hence, our method overcomes some of the challenges of amplicon sequencing using short read next generation sequencing and improves the possibility of creating high-quality multilocus barcodes from insect collections.
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Affiliation(s)
- Trace Akankunda
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia
| | - Hien To
- The Bioinformatics Hub, The University of Adelaide, Adelaide, SA, Australia
| | - Carlos Rodriguez Lopez
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia.,Environmental Epigenetics and Genetics Group, Department of Horticulture, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, USA
| | - Remko Leijs
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia.,South Australian Museum, North Terrace, Adelaide, SA, Australia
| | - Katja Hogendoorn
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia
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14
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O'Donnell K, Lutzoni FM, Ward TJ, Benny GL. Evolutionary relationships among mucoralean fungi (Zygomycota): Evidence for family polyphyly on a large scale. Mycologia 2019. [DOI: 10.1080/00275514.2001.12063160] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Kerry O'Donnell
- Microbial Properties Research Unit, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Agricultural Research Service, 1815 North University Street, Peoria, Illinois, USA 61604-3999
| | - François M. Lutzoni
- Department of Botany, The Field Museum, 1400 S. Lake Shore Drive, Chicago, Illinois, USA 60605-2496
| | - Todd J. Ward
- Microbial Properties Research Unit, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Agricultural Research Service, 1815 North University Street, Peoria, Illinois, USA 61604-3999
| | - Gerald L. Benny
- Department of Plant Pathology, 1453 Fifield Hall, University of Florida, Gainesville, Florida, USA 32611-0680
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15
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Two lineages of kingfisher feather lice exhibit differing degrees of cospeciation with their hosts. Parasitology 2019; 146:1083-1095. [PMID: 31046855 DOI: 10.1017/s0031182019000453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Unlike most bird species, individual kingfisher species (Aves: Alcedinidae) are typically parasitized by only a single genus of louse (Alcedoffula, Alcedoecus, or Emersoniella). These louse genera are typically specific to a particular kingfisher subfamily. Specifically, Alcedoecus and Emersoniella parasitize Halcyoninae, whereas Alcedoffula parasitizes Alcedininae and Cerylinae. Although Emersoniella is geographically restricted to the Indo-Pacific region, Alcedoecus and Alcedoffula are geographically widespread. We used DNA sequences from two genes, the mitochondrial COI and nuclear EF-1α genes, to infer phylogenies for the two geographically widespread genera of kingfisher lice, Alcedoffula and Alcedoecus. These phylogenies included 47 kingfisher lice sampled from 11 of the 19 currently recognized genera of kingfishers. We compared louse phylogenies to host phylogenies to reconstruct their cophylogenetic history. Two distinct clades occur within Alcedoffula, one that infests Alcedininae and a second that infests Cerylinae. All species of Alcedoecus were found only on host species of the subfamily Halcyoninae. Cophylogenetic analysis indicated that Alcedoecus, as well as the clade of Alcedoffula occurring on Alcedininae, do not show evidence of cospeciation. In contrast, the clade of Alcedoffula occurring on Cerylinae showed strong evidence of cospeciation.
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16
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Sweet AD, Bush SE, Gustafsson DR, Allen JM, DiBlasi E, Skeen HR, Weckstein JD, Johnson KP. Host and parasite morphology influence congruence between host and parasite phylogenies. Int J Parasitol 2018; 48:641-648. [PMID: 29577890 DOI: 10.1016/j.ijpara.2018.01.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 01/10/2018] [Accepted: 01/16/2018] [Indexed: 02/04/2023]
Abstract
Comparisons of host and parasite phylogenies often show varying degrees of phylogenetic congruence. However, few studies have rigorously explored the factors driving this variation. Multiple factors such as host or parasite morphology may govern the degree of phylogenetic congruence. An ideal analysis for understanding the factors correlated with congruence would focus on a diverse host-parasite system for increased variation and statistical power. In this study, we focused on the Brueelia-complex, a diverse and widespread group of feather lice that primarily parasitise songbirds. We generated a molecular phylogeny of the lice and compared this tree with a phylogeny of their avian hosts. We also tested for the contribution of each host-parasite association to the overall congruence. The two trees overall were significantly congruent, but the contribution of individual associations to this congruence varied. To understand this variation, we developed a novel approach to test whether host, parasite or biogeographic factors were statistically associated with patterns of congruence. Both host plumage dimorphism and parasite ecomorphology were associated with patterns of congruence, whereas host body size, other plumage traits and biogeography were not. Our results lay the framework for future studies to further elucidate how these factors influence the process of host-parasite coevolution.
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Affiliation(s)
- Andrew D Sweet
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 1816 S. Oak St., Champaign, IL 61820, USA; Program in Ecology, Evolution, and Conservation Biology, School of Integrative Biology, University of Illinois at Urbana-Champaign, USA.
| | - Sarah E Bush
- Department of Biology, University of Utah, 257 S. 1400 E. Salt Lake City, UT 84112, USA
| | - Daniel R Gustafsson
- Department of Biology, University of Utah, 257 S. 1400 E. Salt Lake City, UT 84112, USA; Guangdong Key Laboratory of Animal Conservation and Resources, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, Guangdong, China
| | - Julie M Allen
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 1816 S. Oak St., Champaign, IL 61820, USA
| | - Emily DiBlasi
- Department of Biology, University of Utah, 257 S. 1400 E. Salt Lake City, UT 84112, USA
| | - Heather R Skeen
- Field Museum of Natural History, Science and Education, Integrative Research Center, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA; The University of Chicago, Committee on Evolutionary Biology, Culver Hall 402, Chicago, IL 60637, USA
| | - Jason D Weckstein
- Department of Ornithology, Academy of Natural Science, Drexel University, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA; Department of Biodiversity, Earth, and Environmental Sciences, Drexel University, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA
| | - Kevin P Johnson
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 1816 S. Oak St., Champaign, IL 61820, USA
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17
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Martoni F, Bulman SR, Pitman A, Armstrong KF. Elongation Factor-1α Accurately Reconstructs Relationships Amongst Psyllid Families (Hemiptera: Psylloidea), with Possible Diagnostic Implications. JOURNAL OF ECONOMIC ENTOMOLOGY 2017; 110:2618-2622. [PMID: 29040629 DOI: 10.1093/jee/tox261] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Indexed: 06/07/2023]
Abstract
The superfamily Psylloidea (Hemiptera: Sternorrhyncha) lacks a robust multigene phylogeny. This impedes our understanding of the evolution of this group of insects and, consequently, an accurate identification of individuals, of their plant host associations, and their roles as vectors of economically important plant pathogens. The conserved nuclear gene elongation factor-1 alpha (EF-1α) has been valuable as a higher-level phylogenetic marker in insects and it has also been widely used to investigate the evolution of intron/exon structure. To explore evolutionary relationships among Psylloidea, polymerase chain reaction amplification and nucleotide sequencing of a 250-bp EF-1α gene fragment was applied to psyllids belonging to five different families. Introns were detected in three individuals belonging to two families. The nine genera belonging to the family Aphalaridae all lacked introns, highlighting the possibility of using intron presence/absence as a diagnostic tool at a family level. When paired with cytochrome oxidase I gene sequences, the 250 bp EF-1α sequence appeared to be a very promising higher-level phylogenetic marker for psyllids.
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Affiliation(s)
- Francesco Martoni
- Bio-Protection Research Centre, Lincoln University, New Zealand
- Australian Plant Biosecurity Cooperative Research Centre, Australia
| | - Simon R Bulman
- Australian Plant Biosecurity Cooperative Research Centre, Australia
- The New Zealand Institute for Plant & Food Research Limited, New Zealand
- Better Border Biosecurity (B3), New Zealand
| | - Andrew Pitman
- Bio-Protection Research Centre, Lincoln University, New Zealand
- The New Zealand Institute for Plant & Food Research Limited, New Zealand
| | - Karen F Armstrong
- Bio-Protection Research Centre, Lincoln University, New Zealand
- Australian Plant Biosecurity Cooperative Research Centre, Australia
- The New Zealand Institute for Plant & Food Research Limited, New Zealand
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18
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Catanach TA, Valim MP, Weckstein JD, Johnson KP. Cophylogenetic analysis of lice in the
Colpocephalum
complex (Phthiraptera: Amblycera). ZOOL SCR 2017. [DOI: 10.1111/zsc.12262] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Therese A. Catanach
- Department of Ornithology Academy of Natural Sciences Drexel University Philadelphia PA USA
| | - Michel P. Valim
- Department of Ornithology Academy of Natural Sciences Drexel University Philadelphia PA USA
- Museu de Zoologia da Universidade de São Paulo São Paulo SP Brazil
- Biotério da Universidade Iguaçu Nova Iguaçu RJ Brazil
| | - Jason D. Weckstein
- Department of Ornithology Academy of Natural Sciences Drexel University Philadelphia PA USA
- Department of Biodiversity, Earth, and Environmental Sciences Drexel University Philadelphia PA USA
| | - Kevin P. Johnson
- Illinois Natural History Survey Prairie Research Institute University of Illinois at Urbana‐Champaign Champaign IL USA
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19
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The roles of barriers, refugia, and chromosomal clines underlying diversification in Atlantic Forest social wasps. Sci Rep 2017; 7:7689. [PMID: 28794485 PMCID: PMC5550474 DOI: 10.1038/s41598-017-07776-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 07/03/2017] [Indexed: 12/11/2022] Open
Abstract
Phylogeographic studies have sought to explain the genetic imprints of historical climatic changes and geographic barriers within the Brazilian Atlantic Forest (AF) biota, and consequently two processes of diversification (refugia and barriers) have been proposed. Additionally, there is evidence that eustatic changes influenced the biogeographic history of the AF. Here we evaluate these contrasting diversification processes using two AF social wasp species – the mid-montane Synoeca cyanea and the lowland Synoeca aff. septentrionalis. We analyzed several sources of data including multilocus DNA sequence, climatic niche models and chromosomal features. We find support for idiosyncratic phylogeographic patterns between these wasps, involving different levels of population structure and genetic diversity, contrary suitable climatic conditions during the last glaciation, and contrasting historical movements along the AF. Our data indicate that neotectonics and refugia played distinct roles in shaping the genetic structure of these wasps. However, we argue that eustatic changes influenced the demographic expansion but not population structure in AF biota. Notably, these wasps exhibited chromosomal clines, involving chromosome number and decreasing of GC content, latitudinally oriented along the AF. Together, these results reinforce the need to consider individual organismal histories and indicate that barriers and refugia are significant factors in understanding AF evolution.
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20
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Wang WX, Zhu TH, Li KL, Chen LF, Lai FX, Fu Q. Molecular characterization, expression analysis and RNAi knock-down of elongation factor 1α and 1γ from Nilaparvata lugens and its yeast-like symbiont. BULLETIN OF ENTOMOLOGICAL RESEARCH 2017; 107:303-312. [PMID: 27809951 DOI: 10.1017/s0007485316000882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In the present paper, four cDNAs encoding the alpha and gamma subunits of elongation factor 1 (EF-1) were cloned and sequenced from Nilaparvata lugens, named NlEF-1α, NlEF-1γ, and its yeast-like symbiont (YLS), named YsEF-1α and YsEF-1γ, respectively. Comparisons with sequences from other species indicated a greater conservation for EF-1α than for EF-1γ. NlEF-1α has two identical copies. The deduced amino acid sequence homology of NlEF-1α and NlEF-1γ is 96 and 64%, respectively, compared with Homalodisca vitripennis and Locusta migratoria. The deduced amino acid sequence homology of YsEF-1α and YsEF-1γ is 96 and 74%, respectively, compared with Metarhizium anisopliae and Ophiocordyceps sinensis. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) analysis revealed that the expression level of NlEF-1α and NlEF-1γ mRNA in hemolymph, ovary, fat body and salivary glands were higher than the midgut and leg tissue. YsEF-1α and YsEF-1γ was highly expressed in fat body. The expression level of NlEF-1α was higher than that of NlEF-1γ. Through RNA interference (RNAi) of the two genes, the mortality of nymph reached 92.2% at the 11th day after treatment and the ovarian development was severely hindered. The RT-qPCR analysis verified the correlation between mortality, sterility and the down-regulation of the target genes. The expression and synthesis of vitellogenin (Vg) protein in insects injected with NlEF-1α and NlEF-1γ double-stranded RNA (dsRNA) was significantly lower than control groups. Attempts to knockdown the YsEF-1 genes in the YLS was unsuccessful. However, the phenotype of N. lugens injected with YsEF-1α dsRNA was the same as that injected with NlEF-1α dsRNA, possibly due to the high similarity (up to 71.9%) in the nucleotide sequences between NlEF-1α and YsEF-1α. We demonstrated that partial silencing of NlEF-1α and NlEF-1γ genes caused lethal and sterility effect on N. lugens. NlEF-1γ shares low identity with that of other insects and therefore it could be a potential target for RNAi-based pest management.
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Affiliation(s)
- W X Wang
- State Key Laboratory of Rice Biology,China National Rice Research Institute,Tiyuchang Road 359, Hangzhou, Zhejiang, 310006,People's Republic of China
| | - T H Zhu
- College of Biological and Environmental Engineering,Zhejiang University of Technology,Chaowang Road,Hangzhou,Zhejiang, 310014,People's Republic of China
| | - K L Li
- State Key Laboratory of Rice Biology,China National Rice Research Institute,Tiyuchang Road 359, Hangzhou, Zhejiang, 310006,People's Republic of China
| | - L F Chen
- State Key Laboratory of Rice Biology,China National Rice Research Institute,Tiyuchang Road 359, Hangzhou, Zhejiang, 310006,People's Republic of China
| | - F X Lai
- State Key Laboratory of Rice Biology,China National Rice Research Institute,Tiyuchang Road 359, Hangzhou, Zhejiang, 310006,People's Republic of China
| | - Q Fu
- State Key Laboratory of Rice Biology,China National Rice Research Institute,Tiyuchang Road 359, Hangzhou, Zhejiang, 310006,People's Republic of China
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21
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Normark BB. EVOLUTION IN A PUTATTVELY ANCIENT ASEXUAL APHID LINEAGE: RECOMBINATION AND RAPID KARYOTYPE CHANGE. Evolution 2017; 53:1458-1469. [PMID: 28565550 DOI: 10.1111/j.1558-5646.1999.tb05410.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/1999] [Accepted: 04/20/1999] [Indexed: 11/28/2022]
Abstract
Ancient asexual lineages are of great potential significance for understanding the evolutionary biology of sex, but their existence is controversial. In part, this is because claims of ancient asexuality have rested on negative evidence-a mere absence of evidence for sexuality in a taxon. M. Meselson has suggested a method, discussed by Judson and Normark (1996) and by Birky (1996), that has the potential to uncover positive evidence of ancient asexuality. Phylogenetic relationships between alleles and interallelic divergences are predicted to be very different in diploid lineages that lack recombination from those in diploid lineages that undergo recombination. I have applied Meselson's method to the putatively ancient asexual aphid tribe Tramini (Homoptera: Aphidoidea: Lachnidae), using the intron-bearing nuclear protein-coding gene elongation factor 1α (EF-1α). I found heterozygosities much lower than intraspecific divergences, indicating that some recombination has occurred, but not discriminating between recombination within an asexual lineage (automixis or mitotic recombination) and outcrossing sex. Species of Tramini (especially in the genus Trama) typically have highly structurally heterozygous karyotypes that appear to be incompatible with regular successful meiosis, and have very high levels of karyotype variability within species. I found very high levels of karyotype variability within lineages with identical EF-1α and mitochondrial (cytochrome oxidase 1 and 2) genotypes, indicating a high rate of karyotype evolution compared to the rate of nucleotide substitution.
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Affiliation(s)
- Benjamin B Normark
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, 85721.,Department of Entomology, The Natural History Museum, Cromwell Road, London, SW7 5BD, United Kingdom
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22
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Belshaw R, Quicke DLJ, Völkl W, Godfray HCJ. MOLECULAR MARKERS INDICATE RARE SEX IN A PREDOMINANTLY ASEXUAL PARASITOID WASP. Evolution 2017; 53:1189-1199. [DOI: 10.1111/j.1558-5646.1999.tb04532.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/1998] [Accepted: 03/19/1999] [Indexed: 11/29/2022]
Affiliation(s)
- Robert Belshaw
- Department of Biology and NERC Centre for Population Biology; Imperial College at Silwood Park; Ascot Berks SL5 7PY United Kingdom
| | - Donald L. J. Quicke
- Department of Biology and NERC Centre for Population Biology; Imperial College at Silwood Park; Ascot Berks SL5 7PY United Kingdom
- Department of Entomology; The Natural History Museum; London SW7 5BD United Kingdom
| | - Wolfgang Völkl
- Department of Animal Ecology; University of Bayreuth; P.O. Box 101 251 D-95440 Bayreuth Germany
| | - H. Charles J. Godfray
- Department of Biology and NERC Centre for Population Biology; Imperial College at Silwood Park; Ascot Berks SL5 7PY United Kingdom
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23
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Chen J, Jiang D, Tan D, Fan Z, Wei Y, Li M, Wang D. Heterozygous mutation of eEF1A1b resulted in spermatogenesis arrest and infertility in male tilapia, Oreochromis niloticus. Sci Rep 2017; 7:43733. [PMID: 28266557 PMCID: PMC5339811 DOI: 10.1038/srep43733] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 01/27/2017] [Indexed: 01/23/2023] Open
Abstract
Eukaryotic elongation factor 1 alpha (eEF1A) is an essential component of the translational apparatus. In the present study, eEF1A1b was isolated from the Nile tilapia. Real-time PCR and Western blot revealed that eEF1A1b was expressed highly in the testis from 90 dah (days after hatching) onwards. In situ hybridization and immunohistochemistry analyses showed that eEF1A1b was highly expressed in the spermatogonia of the testis. CRISPR/Cas9 mediated mutation of eEF1A1b resulted in spermatogenesis arrest and infertility in the F0 XY fish. Consistently, heterozygous mutation of eEF1A1b (eEF1A1b+/-) resulted in an absence of spermatocytes at 90 dah, very few spermatocytes, spermatids and spermatozoa at 180 dah, and decreased Cyp11b2 and serum 11-ketotestosterone level at both stages. Further examination of the fertilization capacity of the sperm indicated that the eEF1A1b+/- XY fish were infertile due to abnormal spermiogenesis. Transcriptomic analyses of the eEF1A1b+/- testis from 180 dah XY fish revealed that key elements involved in spermatogenesis, steroidogenesis and sperm motility were significantly down-regulated compared with the control XY. Transgenic overexpression of eEF1A1b rescued the spermatogenesis arrest phenotype of the eEF1A1b+/- testis. Taken together, our data suggested that eEF1A1b is crucial for spermatogenesis and male fertility in the Nile tilapia.
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Affiliation(s)
- Jinlin Chen
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Dongneng Jiang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Dejie Tan
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Zheng Fan
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Yingying Wei
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Minghui Li
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Deshou Wang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
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Cruaud P, Rasplus JY, Rodriguez LJ, Cruaud A. High-throughput sequencing of multiple amplicons for barcoding and integrative taxonomy. Sci Rep 2017; 7:41948. [PMID: 28165046 PMCID: PMC5292727 DOI: 10.1038/srep41948] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 01/03/2017] [Indexed: 11/09/2022] Open
Abstract
Until now, the potential of NGS for the construction of barcode libraries or integrative taxonomy has been seldom realised. Here, we amplified (two-step PCR) and simultaneously sequenced (MiSeq) multiple markers from hundreds of fig wasp specimens. We also developed a workflow for quality control of the data. Illumina and Sanger sequences accumulated in the past years were compared. Interestingly, primers and PCR conditions used for the Sanger approach did not require optimisation to construct the MiSeq library. After quality controls, 87% of the species (76% of the specimens) had a valid MiSeq sequence for each marker. Importantly, major clusters did not always correspond to the targeted loci. Nine specimens exhibited two divergent sequences (up to 10%). In 95% of the species, MiSeq and Sanger sequences obtained from the same sampling were similar. For the remaining 5%, species were paraphyletic or the sequences clustered into divergent groups on the Sanger + MiSeq trees (>7%). These problematic cases may represent coding NUMTS or heteroplasms. Our results illustrate that Illumina approaches are not artefact-free and confirm that Sanger databases can contain non-target genes. This highlights the importance of quality controls, working with taxonomists and using multiple markers for DNA-taxonomy or species diversity assessment.
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Affiliation(s)
| | | | - Lillian Jennifer Rodriguez
- INRA, UMR1062 CBGP, F-34988 Montferrier-sur-Lez, France
- Institute of Biology, University of the Philippines Diliman, Quezon City, Philippines
| | - Astrid Cruaud
- INRA, UMR1062 CBGP, F-34988 Montferrier-sur-Lez, France
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Takano OM, Mitchell PS, Gustafsson DR, Adite A, Voelker G, Light JE. An Assessment of Host Associations, Geographic Distributions, and Genetic Diversity of Avian Chewing Lice (Insecta: Phthiraptera) from Benin. J Parasitol 2017; 103:152-160. [PMID: 28067108 DOI: 10.1645/16-137] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Host associations of highly host-specific chewing lice (Insecta: Phthiraptera) across multiple avian species remains fairly undocumented in the West African country of Benin. Two hundred and seventeen bird specimens collected from multiple localities across Benin and housed at the Texas A&M University Biodiversity Research and Teaching Collections were examined for lice. Lice were identified and genetic data (mitochondrial COI and nuclear EF-1α genes) were obtained and phylogenetically analyzed. In total, we found 15 host associations, 7 of which were new to science. Genetically, most lice from Benin were unique and could represent new species. Based on host associations and unique genetic lineages, we estimate we discovered a minimum of 4 and possibly as many as 8 new chewing louse species. Given the lack of current data on chewing louse species distributions in Benin, this study adds to the knowledge of host associations, geographic distribution, and genetic variability of avian chewing louse species in West Africa.
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Affiliation(s)
- Oona M Takano
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas 77843
| | - Preston S Mitchell
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas 77843
| | - Daniel R Gustafsson
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas 77843
| | - Alphonse Adite
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas 77843
| | - Gary Voelker
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas 77843
| | - Jessica E Light
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas 77843
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Cophylogenetic analysis of New World ground-doves (Aves: Columbidae) and their parasitic wing lice (Insecta: Phthiraptera: Columbicola). Mol Phylogenet Evol 2016; 103:122-132. [DOI: 10.1016/j.ympev.2016.07.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/13/2016] [Accepted: 07/17/2016] [Indexed: 11/24/2022]
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Genomic Mining of Phylogenetically Informative Nuclear Markers in Bark and Ambrosia Beetles. PLoS One 2016; 11:e0163529. [PMID: 27668729 PMCID: PMC5036811 DOI: 10.1371/journal.pone.0163529] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 09/10/2016] [Indexed: 11/19/2022] Open
Abstract
Deep level insect relationships are generally difficult to resolve, especially within taxa of the most diverse and species rich holometabolous orders. In beetles, the major diversity occurs in the Phytophaga, including charismatic groups such as leaf beetles, longhorn beetles and weevils. Bark and ambrosia beetles are wood boring weevils that contribute 12 percent of the diversity encountered in Curculionidae, one of the largest families of beetles with more than 50000 described species. Phylogenetic resolution in groups of Cretaceous age has proven particularly difficult and requires large quantity of data. In this study, we investigated 100 nuclear genes in order to select a number of markers with low evolutionary rates and high phylogenetic signal. A PCR screening using degenerate primers was applied to 26 different weevil species. We obtained sequences from 57 of the 100 targeted genes. Sequences from each nuclear marker were aligned and examined for detecting multiple copies, pseudogenes and introns. Phylogenetic informativeness (PI) and the capacity for reconstruction of previously established phylogenetic relationships were used as proxies for selecting a subset of the 57 amplified genes. Finally, we selected 16 markers suitable for large-scale phylogenetics of Scolytinae and related weevil taxa.
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28
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Escalante GC, Sweet AD, McCracken KG, Gustafsson DR, Wilson RE, Johnson KP. Patterns of cryptic host specificity in duck lice based on molecular data. MEDICAL AND VETERINARY ENTOMOLOGY 2016; 30:200-208. [PMID: 26753998 DOI: 10.1111/mve.12157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/11/2015] [Accepted: 08/22/2015] [Indexed: 06/05/2023]
Abstract
Documenting patterns of host specificity in parasites relies on the adequate definition of parasite species. In many cases, parasites have simplified morphology, making species delimitation based on traditional morphological characters difficult. Molecular data can help in assessing whether widespread parasites harbour cryptic species and, alternatively, in guiding further taxonomic revision in cases in which there is morphological variation. The duck louse genus Anaticola (Phthiraptera: Philopteridae), based on current taxonomy, contains both host-specific and widespread species. Mitochondrial and nuclear DNA sequences of samples from this genus were used to document patterns of host specificity. The comparison of these patterns with morphological variations in Anaticola revealed a general correspondence between the groups identified by DNA sequences and morphology, respectively. These results suggest that a more thorough taxonomic review of this genus is needed. In general, the groups identified on the basis of molecular data were associated with particular groups of waterfowl (e.g. dabbling ducks, sea ducks, geese) or specific biogeographic regions (e.g. North America, South America, Australia, Eurasia).
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Affiliation(s)
- G C Escalante
- Illinois Natural History Survey, University of Illinois, Champaign, IL, U.S.A
| | - A D Sweet
- Illinois Natural History Survey, University of Illinois, Champaign, IL, U.S.A
| | - K G McCracken
- Department of Biology, University of Miami, Miami, FL, U.S.A
- Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL, U.S.A
- Department of Biology, University of Utah, Salt Lake City, UT, U.S.A
| | - D R Gustafsson
- Department of Biology, University of Utah, Salt Lake City, UT, U.S.A
| | - R E Wilson
- Institute of Arctic Biology, University of Alaska, Fairbanks, AK, U.S.A
| | - K P Johnson
- Illinois Natural History Survey, University of Illinois, Champaign, IL, U.S.A
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29
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Light JE, Nessner CE, Gustafsson DR, Wise SR, Voelker G. Remarkable levels of avian louse (Insecta: Phthiraptera) diversity in the Congo Basin. ZOOL SCR 2016. [DOI: 10.1111/zsc.12170] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jessica E. Light
- Department of Wildlife and Fisheries Sciences; Texas A&M University; 210 Nagle Hall College Station TX 77843 USA
| | - Caitlin E. Nessner
- Department of Wildlife and Fisheries Sciences; Texas A&M University; 210 Nagle Hall College Station TX 77843 USA
| | - Daniel R. Gustafsson
- Department of Biology; University of Utah; 257 South 1400 East, Room 201 Salt Lake City UT 84112 USA
| | - Samantha R. Wise
- Department of Wildlife and Fisheries Sciences; Texas A&M University; 210 Nagle Hall College Station TX 77843 USA
| | - Gary Voelker
- Department of Wildlife and Fisheries Sciences; Texas A&M University; 210 Nagle Hall College Station TX 77843 USA
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30
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Molecular phylogeny of Pompilinae (Hymenoptera: Pompilidae): Evidence for rapid diversification and host shifts in spider wasps. Mol Phylogenet Evol 2016; 94:55-64. [DOI: 10.1016/j.ympev.2015.08.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 07/20/2015] [Accepted: 08/14/2015] [Indexed: 01/02/2023]
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31
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Waichert C, Rodriguez J, Wasbauer MS, von Dohlen CD, Pitts JP. Molecular phylogeny and systematics of spider wasps (Hymenoptera: Pompilidae): redefining subfamily boundaries and the origin of the family. Zool J Linn Soc 2015. [DOI: 10.1111/zoj.12272] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Cecilia Waichert
- Department of Biology; Utah State University; 5305 Old Main Hill Logan UT 84326 USA
| | - Juanita Rodriguez
- Department of Biological Sciences; Auburn University; 101 Life Sciences Building Auburn AL 36849 USA
| | | | - Carol D. von Dohlen
- Department of Biology; Utah State University; 5305 Old Main Hill Logan UT 84326 USA
| | - James P. Pitts
- Department of Biology; Utah State University; 5305 Old Main Hill Logan UT 84326 USA
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Rivera-Parra JL, Levin II, Johnson KP, Parker PG. Lineage sorting in multihost parasites: Eidmanniella albescens and Fregatiella aurifasciata on seabirds from the Galapagos Islands. Ecol Evol 2015; 5:3264-71. [PMID: 26380662 PMCID: PMC4569024 DOI: 10.1002/ece3.1587] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 06/03/2015] [Accepted: 06/08/2015] [Indexed: 11/06/2022] Open
Abstract
Parasites comprise a significant percentage of the biodiversity of the planet and are useful systems to test evolutionary and ecological hypotheses. In this study, we analyze the effect of host species identity and the immediate local species assemblage within mixed species colonies of nesting seabirds on patterns of genetic clustering within two species of multihost ectoparasitic lice. We use three genetic markers (one mitochondrial, COI, and two nuclear, EF1-α and wingless) and maximum likelihood phylogenetic trees to test whether (1) parasites show lineage sorting based on their host species; and (2) switching of lineages to the alternate host species depends on the immediate local species assemblage of individual hosts within a colony. Specifically, we examine the genetic structure of two louse species: Eidmanniella albescens, infecting both Nazca (Sula granti) and blue-footed boobies (Sula nebouxii), and Fregatiella aurifasciata, infecting both great (Fregata minor) and magnificent frigatebirds (Fregata magnificens). We found that host species identity was the only factor explaining the patterns of genetic structure in both parasites. In both cases, there is evident genetic differentiation depending on the host species. Thus, a revision of the taxonomy of these louse species is needed. One possible explanation of this pattern is extremely low louse migration rates between host species, perhaps influenced by fine-scale spatial separation of host species within mixed colonies, and low parasite infrapopulation numbers.
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Affiliation(s)
- Jose L Rivera-Parra
- Department of Biology and Whitney R. Harris World Ecology Center, University of Missouri - St Louis St Louis, Missouri, 63110 ; Facultad de Geología y Petróleos, Departamento de Petróleos, Escuela Politécnica Nacional del Ecuador Quito, Ecuador
| | - Iris I Levin
- Department of Biology and Whitney R. Harris World Ecology Center, University of Missouri - St Louis St Louis, Missouri, 63110
| | - Kevin P Johnson
- Illinois Natural History Survey, University of Illinois Champaign, Illinois, 61820
| | - Patricia G Parker
- Department of Biology and Whitney R. Harris World Ecology Center, University of Missouri - St Louis St Louis, Missouri, 63110 ; Saint Louis Zoo WildCare Institute, One Government Drive Saint Louis, Missouri, 63110
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Ueno T, Takeuchi H, Kawasaki K, Kubo T. Changes in the Gene Expression Profiles of the Hypopharyngeal Gland of Worker Honeybees in Association with Worker Behavior and Hormonal Factors. PLoS One 2015; 10:e0130206. [PMID: 26083737 PMCID: PMC4470657 DOI: 10.1371/journal.pone.0130206] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Accepted: 05/18/2015] [Indexed: 01/24/2023] Open
Abstract
The hypopharyngeal glands (HPGs) of worker honeybees undergo physiological changes along with the age-dependent role change from nursing to foraging: nurse bee HPGs secrete mainly major royal jelly proteins, whereas forager HPGs secrete mainly α-glucosidase III, which converts the sucrose in the nectar into glucose and fructose. We previously identified two other genes, Apis mellifera buffy (Ambuffy) and Apis mellifera matrix metalloproteinase 1 (AmMMP1), with enriched expression in nurse bee and forager HPGs, respectively. In the present study, to clarify the molecular mechanisms that coordinate HPG physiology with worker behavior, we first analyzed whether Ambuffy, AmMMP1, mrjp2 (a gene encoding one of major royal jelly protein isoforms), and Hbg3 (a gene encoding α-glucosidase III) expression, is associated with worker behavior in 'single-cohort colonies' where workers of almost the same age perform different tasks. Expression of these genes correlated with the worker’s role, while controlling for age, indicating their regulation associated with the worker’s behavior. Associated gene expression suggested the possible involvement of some hormonal factors in its regulation. We therefore examined the relationship between ecdysone- and juvenile hormone (JH)-signaling, and the expression profiles of these ‘indicator’ genes (nurse bee HPG-selective genes: mrjp2 and Ambuffy, and forager HPG-selective genes: Hbg3 and AmMMP1). Expression of both ecdysone-regulated genes (ecdysone receptor, mushroom body large type Kenyon cell specific protein-1, and E74) and JH-regulated genes (Methoprene tolerant and Krüppel homolog 1) was higher in the forager HPGs than in the nurse bee HPGs, suggesting the possible roles of ecdysone- and JH-regulated genes in worker HPGs. Furthermore, 20-hydroxyecdysone-treatment repressed both nurse bee- and forager-selective gene expression, whereas methoprene-treatment enhanced the expression of forager-selective genes and repressed nurse bee-selective genes in the HPGs. Our findings suggest that both ecdysone- and JH-signaling cooperatively regulate the physiological state of the HPGs in association with the worker’s behavior.
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Affiliation(s)
- Takayuki Ueno
- Department of Biological Sciences, Graduate School of Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, 113–0033, Japan
- Faculty of Pharmaceutical Sciences, Doshisha Women's College, Kyotanabe, Kyoto, 610–0395, Japan
| | - Hideaki Takeuchi
- Department of Biological Sciences, Graduate School of Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, 113–0033, Japan
| | - Kiyoshi Kawasaki
- Faculty of Pharmaceutical Sciences, Doshisha Women's College, Kyotanabe, Kyoto, 610–0395, Japan
| | - Takeo Kubo
- Department of Biological Sciences, Graduate School of Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, 113–0033, Japan
- * E-mail:
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Nguyen DT, Spooner-Hart RN, Riegler M. Polyploidy versus endosymbionts in obligately thelytokous thrips. BMC Evol Biol 2015; 15:23. [PMID: 25880387 PMCID: PMC4349774 DOI: 10.1186/s12862-015-0304-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 02/10/2015] [Indexed: 11/10/2022] Open
Abstract
Background Thelytoky, the parthenogenetic development of females, has independently evolved in several insect orders yet the study of its mechanisms has so far mostly focussed on haplodiploid Hymenoptera, while alternative mechanisms of thelytoky such as polyploidy are far less understood. In haplodiploid insects, thelytoky can be encoded in their genomes, or induced by maternally inherited bacteria such as Wolbachia or Cardinium. Microbially facilitated thelytoky usually results in complete homozygosity due to gamete duplication and can be reverted into arrhenotoky, the parthenogenetic development of males, through treatment with antibiotics. In contrast, genetically encoded thelytoky cannot be removed and may result in conservation of heterozygosity due to gamete fusion. We have probed the obligate thelytoky of the greenhouse thrips, Heliothrips haemorrhoidalis (Bouché), a significant cosmopolitan pest and a model species of thelytoky in the haplodiploid insect order Thysanoptera. Earlier studies suggested terminal fusion as a mechanism for thelytoky in this species, while another study reported presence of Wolbachia; later it was speculated that Wolbachia plays a role in this thrips’ thelytokous reproduction. Results By using PCR and sequence analysis, we demonstrated that global population samples of H. haemorrhoidalis were not infected with Wolbachia, Cardinium or any other known bacterial reproductive manipulators. Antibiotic treatment of this thrips did also not result in male production. Some individuals carried two different alleles in two nuclear loci, histone 3 and elongation factor 1 alpha, suggesting heterozygosity. However, the majority of individuals had three different alleles suggesting that they were polyploid. Genetic diversity across both nuclear loci was low in all populations, and absent from mitochondrial cytochrome oxidase I, indicating that this species had experienced genetic bottlenecks, perhaps due to its invasion biology or a switch to thelytoky. Conclusions Geographically broad sampling and experimental manipulation revealed low genetic diversity, absence of Wolbachia but presence of three different alleles of nuclear loci in most analysed individuals of obligately thelytokous H. haemorrhoidalis. This suggests that polyploidy may be involved in the thelytokous reproduction of this thrips species, and polyploidy may be a contributing factor in the reproduction of Thysanoptera and other haplodiploid insect orders. Electronic supplementary material The online version of this article (doi:10.1186/s12862-015-0304-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Duong T Nguyen
- Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Robert N Spooner-Hart
- Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia. .,School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Markus Riegler
- Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia.
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35
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Catanach TA, Johnson KP. Independent origins of the feather lice (Insecta:Degeeriella) of raptors. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12453] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Therese A. Catanach
- Illinois Natural History Survey; Prairie Research Institute; University of Illinois; Champaign IL 61820 USA
- Department of Wildlife and Fisheries Sciences; Texas A&M University; College Station TX 77843 USA
| | - Kevin P. Johnson
- Illinois Natural History Survey; Prairie Research Institute; University of Illinois; Champaign IL 61820 USA
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Martinů J, Sychra O, Literák I, Čapek M, Gustafsson DL, Štefka J. Host generalists and specialists emerging side by side: an analysis of evolutionary patterns in the cosmopolitan chewing louse genus Menacanthus. Int J Parasitol 2014; 45:63-73. [PMID: 25311782 DOI: 10.1016/j.ijpara.2014.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/26/2014] [Accepted: 09/04/2014] [Indexed: 11/26/2022]
Abstract
Parasites with wide host spectra provide opportunities to study the ecological parameters of speciation, as well as the process of the evolution of host specificity. The speciose and cosmopolitan louse genus Menacanthus comprises both multi-host and specialised species, allowing exploration of the ecological and historical factors affecting the evolution of parasites using a comparative approach. We used phylogenetic analysis to reconstruct evolutionary relationships in 14 species of Menacanthus based on the sequences of one mitochondrial and one nuclear gene. The results allowed us to validate species identification based on morphology, as well as to explore host distribution by assumed generalist and specialist species. Our analyses confirmed a narrow host use for several species, however in some cases, the supposed host specialists had a wider host spectrum than anticipated. In one case a host generalist (Menacanthus eurysternus) was clustered terminally on a clade almost exclusively containing host specialists. Such a clade topology indicates that the process of host specialisation may not be irreversible in parasite evolution. Finally, we compared patterns of population genetic structure, geographic distribution and host spectra between two selected species, M. eurysternus and Menacanthus camelinus, using haplotype networks. Menacanthus camelinus showed limited geographical distribution in combination with monoxenous host use, whereas M. eurysternus showed a global distribution and lack of host specificity. It is suggested that frequent host switching maintains gene flow between M. eurysternus populations on unrelated hosts in local populations. However, gene flow between geographically distant localities was restricted, suggesting that geography rather than host-specificity is the main factor defining the global genetic diversity of M. eurysternus.
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Affiliation(s)
- Jana Martinů
- Faculty of Science, University of South Bohemia and Biology Centre ASCR, Institute of Parasitology, Branisovska 31, 37005 Ceske Budejovice, Czech Republic.
| | - Oldřich Sychra
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1/3, 61242 Brno, Czech Republic
| | - Ivan Literák
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1/3, 61242 Brno, Czech Republic
| | - Miroslav Čapek
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, v.v.i., Kvetna 8, 60365 Brno, Czech Republic
| | | | - Jan Štefka
- Faculty of Science, University of South Bohemia and Biology Centre ASCR, Institute of Parasitology, Branisovska 31, 37005 Ceske Budejovice, Czech Republic
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37
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Praz CJ, Packer L. Phylogenetic position of the bee genera Ancyla and Tarsalia (Hymenoptera: Apidae): a remarkable base compositional bias and an early Paleogene geodispersal from North America to the Old World. Mol Phylogenet Evol 2014; 81:258-70. [PMID: 25238948 DOI: 10.1016/j.ympev.2014.09.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 09/05/2014] [Accepted: 09/09/2014] [Indexed: 11/24/2022]
Abstract
We address the phylogenetic position of the bee genera Tarsalia and Ancyla (currently forming the tribe Ancylaini) on the basis of morphological, molecular and combined data. We assembled a matrix of 309 morphological characters and 5246 aligned nucleotide positions from six nuclear genes (28S, EF-1a, wingless, POL2, LW-Rhodopsin, NAK). In addition to both constituent genera of Ancylaini, we include all three subtribes of the Eucerini as well as a large number of other tribes from the "eucerine line". The morphological data suggest Ancyla to be sister to Tarsalia+Eucerini and analyses of the entire molecular dataset suggest Tarsalia to be sister to Ancyla+Eucerini. However, analyses of the combined dataset suggests the Ancylaini to be monophyletic. We address possible bias within the molecular data and show that the base composition of two markers (EF-1a and NAK) is significantly heterogeneous among taxa and that this heterogeneity is strong enough to overcome the phylogenetic signal from the other markers. Analyses of a molecular matrix where the heterogeneous partitions have been RY-recoded yield trees that are better resolved and have higher nodal support values than those recovered in analyses of the non-recoded matrix, and strongly suggest the Ancylaini to be a monophyletic sister group to the Eucerini. A dated phylogeny and ancestral range reconstructions suggest that the common ancestor of the Ancylaini reached the Old World from the New World most probably via the Thulean Land Bridge in a time window between 69 and 47 mya, a period that includes the Early Eocene Climatic Optimum. No further exchanges between the New World and the Old World are implied by our data until the period between 22 mya and 13.9 mya. These more recent faunal exchanges probably involved geodispersal over the Bering Land Bridge by less thermophilic lineages.
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Affiliation(s)
- Christophe J Praz
- Institute of Biology, University of Neuchatel, Emile-Argand 11, 2000 Neuchatel, Switzerland.
| | - Laurence Packer
- Department of Biology, York University, 4700 Keele St., Toronto, ON M3J 1P3, Canada
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Rabeling C, Schultz T, Pierce N, Bacci M. A Social Parasite Evolved Reproductive Isolation from Its Fungus-Growing Ant Host in Sympatry. Curr Biol 2014; 24:2047-52. [DOI: 10.1016/j.cub.2014.07.048] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 05/30/2014] [Accepted: 07/17/2014] [Indexed: 10/24/2022]
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López-Uribe MM, Zamudio KR, Cardoso CF, Danforth BN. Climate, physiological tolerance and sex-biased dispersal shape genetic structure of Neotropical orchid bees. Mol Ecol 2014; 23:1874-90. [PMID: 24641728 DOI: 10.1111/mec.12689] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/20/2014] [Accepted: 02/03/2014] [Indexed: 11/26/2022]
Abstract
Understanding the impact of past climatic events on the demographic history of extant species is critical for predicting species' responses to future climate change. Palaeoclimatic instability is a major mechanism of lineage diversification in taxa with low dispersal and small geographical ranges in tropical ecosystems. However, the impact of these climatic events remains questionable for the diversification of species with high levels of gene flow and large geographical distributions. In this study, we investigate the impact of Pleistocene climate change on three Neotropical orchid bee species (Eulaema bombiformis, E. meriana and E. cingulata) with transcontinental distributions and different physiological tolerances. We first generated ecological niche models to identify species-specific climatically stable areas during Pleistocene climatic oscillations. Using a combination of mitochondrial and nuclear markers, we inferred calibrated phylogenies and estimated historical demographic parameters to reconstruct the phylogeographical history of each species. Our results indicate species with narrower physiological tolerance experienced less suitable habitat during glaciations and currently exhibit strong population structure in the mitochondrial genome. However, nuclear markers with low and high mutation rates show lack of association with geography. These results combined with lower migration rate estimates from the mitochondrial than the nuclear genome suggest male-biased dispersal. We conclude that despite large effective population sizes and capacity for long-distance dispersal, climatic instability is an important mechanism of maternal lineage diversification in orchid bees. Thus, these Neotropical pollinators are susceptible to disruption of genetic connectivity in the event of large-scale climatic changes.
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Dellicour S, Lecocq T, Kuhlmann M, Mardulyn P, Michez D. Molecular phylogeny, biogeography, and host plant shifts in the bee genus Melitta (Hymenoptera: Anthophila). Mol Phylogenet Evol 2013; 70:412-9. [PMID: 23994491 DOI: 10.1016/j.ympev.2013.08.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 08/05/2013] [Accepted: 08/16/2013] [Indexed: 11/25/2022]
Abstract
New molecular studies suggested that the family Melittidae is either a paraphyletic group from which all the other bees are derived, or the sister clade to all other existing bees. Studying the historical biogeography and evolution of each major lineage within this group is a key step to understand the origin and early radiation of bees. Melitta is the largest genus of melittid bees, for which a robust molecular phylogeny and a biogeographic analysis are still lacking. Here, we derive a phylogenetic hypothesis from the sequences of seven independent DNA fragments of mitochondrial and nuclear origin. This phylogenetic hypothesis is then used to infer the evolution of the species range and of the host-plant shifts in Melitta. Our results confirmed the monophyly of Melitta, but did not recover all previously defined clades within the genus. We propose new taxa by splitting the genus in three subgenera (including two new subgenera described in the Appendix: Afromelitta subgen. nov., Plesiomelitta subgen. nov.) and describe two new species: Melitta avontuurensis sp. n. and M. richtersveldensis sp. n. Regarding the evolution of host-plant use, our analysis suggests that all species currently specialized on one plant family originated from an ancestor that was specialized on Fabaceae plants. The inferred biogeographic history for the genus supported an African origin. In concordance with previous studies identifying Africa as the geographic origin for many clades of bees, our data bring new evidence for an African origin of melittid bees.
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Affiliation(s)
- Simon Dellicour
- Evolutionary Biology and Ecology, Université Libre de Bruxelles, Avenue F.D. Roosevelt 50, 1050 Brussels, Belgium.
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41
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Clouse RM, Sharma PP, Giribet G, Wheeler WC. Elongation factor-1α, a putative single-copy nuclear gene, has divergent sets of paralogs in an arachnid. Mol Phylogenet Evol 2013; 68:471-81. [PMID: 23669012 DOI: 10.1016/j.ympev.2013.04.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 03/21/2013] [Accepted: 04/22/2013] [Indexed: 11/17/2022]
Abstract
Identification of paralogy in candidate nuclear loci is an important prerequisite in phylogenetics and statistical phylogeography, but one that is often overlooked. One marker commonly assumed to be a single-copy gene and claimed to harbor great utility for inferring recent divergences is elongation factor-1α (EF-1α). To test this hypothesis, we systematically cloned EF-1α in three disjunct populations of the harvestman Metasiro americanus. Here we show that EF-1α has a large number of paralogs in this species. The paralogs do not evolve in a concerted manner, and the paralogs diverged prior to the population divergence. Moreover, the paralogs of M. americanus are not comparable to the highly divergent EF-1α paralogs found in bees and spiders, which are easily recognized and separated through the use of specific primers. We demonstrate statistically that our detection of paralogs cannot be attributed to amplification error. The presence of EF-1α paralogs in M. americanus prevents its use in statistical phylogeography, and the presence of out-paralogs argues against its use in phylogenetic inference among recently diverged clades. These data contradict the common assumption that EF-1α is for most or all taxa a single-copy gene, or that it has a small number of paralogs that are homogenized through gene conversion, unequal crossing over, or other processes.
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Affiliation(s)
- Ronald M Clouse
- American Museum of Natural History, Division of Invertebrate Zoology, Central Park West at 79th St., New York City, NY 10024, USA.
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Convergent intron gains in hymenopteran elongation factor-1α. Mol Phylogenet Evol 2013; 67:266-76. [PMID: 23396205 DOI: 10.1016/j.ympev.2013.01.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 01/17/2013] [Accepted: 01/29/2013] [Indexed: 11/23/2022]
Abstract
The eukaryotic translation elongation factor-1α gene (eEF1A) has been used extensively in higher level phylogenetics of insects and other groups, despite being present in two or more copies in several taxa. Orthology assessment has relied heavily on the position of introns, but the basic assumption of low rates of intron loss and absence of convergent intron gains has not been tested thoroughly. Here, we study the evolution of eEF1A based on a broad sample of taxa in the insect order Hymenoptera. The gene is universally present in two copies - F1 and F2 - both of which apparently originated before the emergence of the order. An elevated ratio of non-synonymous versus synonymous substitutions and differences in rates of amino acid replacements between the copies suggest that they evolve independently, and phylogenetic methods clearly cluster the copies separately. The F2 copy appears to be ancient; it is orthologous with the copy known as F1 in Diptera, and is likely present in most insect orders. The hymenopteran F1 copy, which may or may not be unique to this order, apparently originated through retroposition and was originally intron free. During the evolution of the Hymenoptera, it has successively accumulated introns, at least three of which have appeared at the same position as introns in the F2 copy or in eEF1A copies in other insects. The sites of convergent intron gain are characterized by highly conserved nucleotides that strongly resemble specific intron-associated sequence motifs, so-called proto-splice sites. The significant rate of convergent intron gain renders intron-exon structure unreliable as an indicator of orthology in eEF1A, and probably also in other protein-coding genes.
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Ronquist F, Klopfstein S, Vilhelmsen L, Schulmeister S, Murray DL, Rasnitsyn AP. A total-evidence approach to dating with fossils, applied to the early radiation of the hymenoptera. Syst Biol 2012; 61:973-99. [PMID: 22723471 PMCID: PMC3478566 DOI: 10.1093/sysbio/sys058] [Citation(s) in RCA: 438] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 10/19/2011] [Accepted: 06/07/2012] [Indexed: 12/04/2022] Open
Abstract
Phylogenies are usually dated by calibrating interior nodes against the fossil record. This relies on indirect methods that, in the worst case, misrepresent the fossil information. Here, we contrast such node dating with an approach that includes fossils along with the extant taxa in a Bayesian total-evidence analysis. As a test case, we focus on the early radiation of the Hymenoptera, mostly documented by poorly preserved impression fossils that are difficult to place phylogenetically. Specifically, we compare node dating using nine calibration points derived from the fossil record with total-evidence dating based on 343 morphological characters scored for 45 fossil (4--20 complete) and 68 extant taxa. In both cases we use molecular data from seven markers (∼5 kb) for the extant taxa. Because it is difficult to model speciation, extinction, sampling, and fossil preservation realistically, we develop a simple uniform prior for clock trees with fossils, and we use relaxed clock models to accommodate rate variation across the tree. Despite considerable uncertainty in the placement of most fossils, we find that they contribute significantly to the estimation of divergence times in the total-evidence analysis. In particular, the posterior distributions on divergence times are less sensitive to prior assumptions and tend to be more precise than in node dating. The total-evidence analysis also shows that four of the seven Hymenoptera calibration points used in node dating are likely to be based on erroneous or doubtful assumptions about the fossil placement. With respect to the early radiation of Hymenoptera, our results suggest that the crown group dates back to the Carboniferous, ∼309 Ma (95% interval: 291--347 Ma), and diversified into major extant lineages much earlier than previously thought, well before the Triassic. [Bayesian inference; fossil dating; morphological evolution; relaxed clock; statistical phylogenetics.].
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Affiliation(s)
- Fredrik Ronquist
- Department of Biodiversity Informatics, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden.
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Sulaiman IM, Anderson M, Oi DH, Simpson S, Kerdahi K. Multilocus genetic characterization of two ant vectors (Group II "Dirty 22" species) known to contaminate food and food products and spread foodborne pathogens. J Food Prot 2012; 75:1447-52. [PMID: 22856568 DOI: 10.4315/0362-028x.jfp-12-098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The U.S. Food and Drug Administration utilizes the presence of filth and extraneous materials as one of the criteria for implementing regulatory actions and assessing adulteration of food products of public health importance. Twenty-two prevalent pest species (also known as the ''Dirty 22'' species) have been considered by this agency as possible vehicles for the spread of foodborne diseases, and the presence of these species is considered an indicator of unsanitary conditions in food processing and storage facilities. In a previous study, we further categorized the Dirty 22 species into four groups: group I includes four cockroach species, group II includes two ant species, group III includes 12 fly species, and group IV includes four rodent species. Here, we describe the development of three nested PCR primer sets and multilocus genetic characterization by amplifying the small subunit rRNA, elongation factor 1-alpha, and wingless (WNT-1) genes of group II Dirty 22 ant species Monomorium pharaonis and Solenopsis molesta. These novel group II Dirty 22 species-specific nested PCR primer sets can be used when the specimens cannot be identified using conventional microscopic methods. These newly developed assays will provide correct identification of group II Dirty 22 ant species, and the information can be used in the control of foodborne pathogens.
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Affiliation(s)
- Irshad M Sulaiman
- U.S. Food and Drug Administration, Southeast Regional Laboratory, 60 Eighth Street, Atlanta, GA 30309, USA.
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Bowman HM, Hoy MA. Molecular discrimination of phytoseiids associated with the red palm mite Raoiella indica (Acari: Tenuipalpidae) from Mauritius and South Florida. EXPERIMENTAL & APPLIED ACAROLOGY 2012; 57:395-407. [PMID: 22527831 DOI: 10.1007/s10493-012-9549-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Accepted: 03/21/2012] [Indexed: 05/31/2023]
Abstract
Phytoseiid populations imported from Mauritius for evaluation for a classical biological control program in Florida, USA, were morphologically identified as Amblyseius largoensis Muma, a species associated with the red palm mite in south Florida and the Caribbean. Bayesian analysis and sequence divergences of the mitochondrial 12S rRNA and nuclear Elongation factor--I alpha (EF-Iα) genes and Neighbor-Joining analysis of High-fidelity-RAPD-PCR markers were used to discriminate between the south Florida and Mauritius populations. High-fidelity-RAPD-PCR markers in addition to Bayesian and sequence divergence analyses of the 12S rRNA sequences suggest that the Mauritius and south Florida populations are genetically different but whether these are species or population differences is unknown. The degenerate EF-Iα primers used to survey the phytoseiids amplified two different elongation factor sequences with distinct amino acid translations, the putative EF-Iα and an unknown elongation factor. Variability within the 12S gene was used to develop population-specific primers for identifying the Mauritius phytoseiids in the event they are released in south Florida.
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Affiliation(s)
- Heidi M Bowman
- Department of Entomology and Nematology, University of Florida, POB 110620, Gainesville, FL 32611, USA.
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Johnson KP, Shreve SM, Smith VS. Repeated adaptive divergence of microhabitat specialization in avian feather lice. BMC Biol 2012; 10:52. [PMID: 22717002 PMCID: PMC3391173 DOI: 10.1186/1741-7007-10-52] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 06/20/2012] [Indexed: 11/30/2022] Open
Abstract
Background Repeated adaptive radiations are evident when phenotypic divergence occurs within lineages, but this divergence into different forms is convergent when compared across lineages. Classic examples of such repeated adaptive divergence occur in island (for example, Caribbean Anolis lizards) and lake systems (for example, African cichlids). Host-parasite systems in many respects are analogous to island systems, where host species represent isolated islands for parasites whose life cycle is highly tied to that of their hosts. Thus, host-parasite systems might exhibit interesting cases of repeated adaptive divergence as seen in island and lake systems. The feather lice of birds spend their entire life cycle on the body of the host and occupy distinct microhabitats on the host: head, wing, body and generalist. These microhabitat specialists show pronounced morphological differences corresponding to how they escape from host preening. We tested whether these different microhabitat specialists were a case of repeated adaptive divergence by constructing both morphological and molecular phylogenies for a diversity of avian feather lice, including many examples of head, wing, body and generalist forms. Results Morphological and molecular based phylogenies were highly incongruent, which could be explained by rampant convergence in morphology related to microhabitat specialization on the host. In many cases lice from different microhabitat specializations, but from the same group of birds, were sister taxa. Conclusions This pattern indicates a process of repeated adaptive divergence of these parasites within host group, but convergence when comparing parasites across host groups. These results suggest that host-parasite systems might be another case in which repeated adaptive radiations could be relatively common, but potentially overlooked, because morphological convergence can obscure evolutionary relationships.
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Affiliation(s)
- Kevin P Johnson
- Illinois Natural History Survey, University of Illinois, Champaign, IL, USA.
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Pereira-da-Conceicoa LL, Price BW, Barber-James HM, Barker NP, de Moor FC, Villet MH. Cryptic variation in an ecological indicator organism: mitochondrial and nuclear DNA sequence data confirm distinct lineages of Baetis harrisoni Barnard (Ephemeroptera: Baetidae) in southern Africa. BMC Evol Biol 2012; 12:26. [PMID: 22373076 PMCID: PMC3523013 DOI: 10.1186/1471-2148-12-26] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 02/08/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Baetis harrisoni Barnard is a mayfly frequently encountered in river studies across Africa, but the external morphological features used for identifying nymphs have been observed to vary subtly between different geographic locations. It has been associated with a wide range of ecological conditions, including pH extremes of pH 2.9-10.0 in polluted waters. We present a molecular study of the genetic variation within B. harrisoni across 21 rivers in its distribution range in southern Africa. RESULTS Four gene regions were examined, two mitochondrial (cytochrome c oxidase subunit I [COI] and small subunit ribosomal 16S rDNA [16S]) and two nuclear (elongation factor 1 alpha [EF1α] and phosphoenolpyruvate carboxykinase [PEPCK]). Bayesian and parsimony approaches to phylogeny reconstruction resulted in five well-supported major lineages, which were confirmed using a general mixed Yule-coalescent (GMYC) model. Results from the EF1α gene were significantly incongruent with both mitochondrial and nuclear (PEPCK) results, possibly due to incomplete lineage sorting of the EF1α gene. Mean between-clade distance estimated using the COI and PEPCK data was found to be an order of magnitude greater than the within-clade distance and comparable to that previously reported for other recognised Baetis species. Analysis of the Isolation by Distance (IBD) between all samples showed a small but significant effect of IBD. Within each lineage the contribution of IBD was minimal. Tentative dating analyses using an uncorrelated log-normal relaxed clock and two published estimates of COI mutation rates suggest that diversification within the group occurred throughout the Pliocene and mid-Miocene (~2.4-11.5 mya). CONCLUSIONS The distinct lineages of B. harrisoni correspond to categorical environmental variation, with two lineages comprising samples from streams that flow through acidic Table Mountain Sandstone and three lineages with samples from neutral-to-alkaline streams found within eastern South Africa, Malawi and Zambia. The results of this study suggest that B. harrisoni as it is currently recognised is not a single species with a wide geographic range and pH-tolerance, but may comprise up to five species under the phylogenetic species concept, each with limited pH-tolerances, and that the B. harrisoni species group is thus in need of taxonomic review.
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Affiliation(s)
| | - Benjamin W Price
- Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Grahamstown, 6140, South Africa
- Department of Freshwater Invertebrates, Albany Museum, Somerset Street, Grahamstown, 6140, South Africa
- Department of Ecology & Evolutionary Biology, University of Connecticut, Storrs, 06269, CT, USA
| | - Helen M Barber-James
- Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Grahamstown, 6140, South Africa
- Department of Freshwater Invertebrates, Albany Museum, Somerset Street, Grahamstown, 6140, South Africa
| | - Nigel P Barker
- Molecular Ecology & Systematics Group, Department of Botany, Rhodes University, P.O. Box 94, Grahamstown, 6140, South Africa
| | - Ferdy C de Moor
- Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Grahamstown, 6140, South Africa
- Department of Freshwater Invertebrates, Albany Museum, Somerset Street, Grahamstown, 6140, South Africa
| | - Martin H Villet
- Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Grahamstown, 6140, South Africa
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Karatolos N, Williamson MS, Denholm I, Gorman K, Ffrench-Constant RH, Bass C. Over-expression of a cytochrome P450 is associated with resistance to pyriproxyfen in the greenhouse whitefly Trialeurodes vaporariorum. PLoS One 2012; 7:e31077. [PMID: 22347432 PMCID: PMC3275616 DOI: 10.1371/journal.pone.0031077] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 01/02/2012] [Indexed: 11/19/2022] Open
Abstract
Background The juvenile hormone mimic, pyriproxyfen is a suppressor of insect embryogenesis and development, and is effective at controlling pests such as the greenhouse whitefly Trialeurodes vaporariorum (Westwood) which are resistant to other chemical classes of insecticides. Although there are reports of insects evolving resistance to pyriproxyfen, the underlying resistance mechanism(s) are poorly understood. Results Bioassays against eggs of a German (TV8) population of T. vaporariorum revealed a moderate level (21-fold) of resistance to pyriproxyfen. This is the first time that pyriproxyfen resistance has been confirmed in this species. Sequential selection of TV8 rapidly generated a strain (TV8pyrsel) displaying a much higher resistance ratio (>4000-fold). The enzyme inhibitor piperonyl butoxide (PBO) suppressed this increased resistance, indicating that it was primarily mediated via metabolic detoxification. Microarray analysis identified a number of significantly over-expressed genes in TV8pyrsel as candidates for a role in resistance including cytochrome-P450 dependent monooxygenases (P450s). Quantitative PCR highlighted a single P450 gene (CYP4G61) that was highly over-expressed (81.7-fold) in TV8pyrsel. Conclusion Over-expression of a single cytochrome P450 gene (CYP4G61) has emerged as a strong candidate for causing the enhanced resistance phenotype. Further work is needed to confirm the role of the encoded P450 enzyme CYP4G61 in detoxifying pyriproxyfen.
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Affiliation(s)
- Nikos Karatolos
- Rothamsted Research, Harpenden, Hertfordshire, United Kingdom.
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Gustafsson DR, Olsson U. Flyway homogenisation or differentiation? Insights from the phylogeny of the sandpiper (Charadriiformes: Scolopacidae: Calidrinae) wing louse genus Lunaceps (Phthiraptera: Ischnocera). Int J Parasitol 2012; 42:93-102. [DOI: 10.1016/j.ijpara.2011.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 11/01/2011] [Accepted: 11/02/2011] [Indexed: 11/16/2022]
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50
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Demastes JW, Spradling TA, Hafner MS, Spies GR, Hafner DJ, Light JE. Cophylogeny on a fine scale: Geomydoecus chewing lice and their pocket gopher hosts, Pappogeomys bulleri. J Parasitol 2011; 98:262-70. [PMID: 22010942 DOI: 10.1645/ge-2904.1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Many species of pocket gophers and their ectoparasitic chewing lice have broadly congruent phylogenies, indicating a history of frequent codivergence. For a variety of reasons, phylogenies of codiverging hosts and parasites are expected to be less congruent for more recently diverged taxa. This study is the first of its scale in the pocket gopher and chewing louse system, with its focus entirely on comparisons among populations within a single species of host and 3 chewing louse species in the Geomydoecus bulleri species complex. We examined mitochondrial DNA from a total of 46 specimens of Geomydoecus lice collected from 11 populations of the pocket gopher host, Pappogeomys bulleri. We also examined nuclear DNA from a subset of these chewing lice. Louse phylogenies were compared with a published pocket gopher phylogeny. Contrary to expectations, we observed a statistically significant degree of parallel cladogenesis in these closely related hosts and their parasites. We also observed a higher rate of evolution in chewing louse lineages than in their corresponding pocket gopher hosts. In addition, we found that 1 louse species (Geomydoecus burti) may not be a valid species, that subspecies within G. bulleri are not reciprocally monophyletic, and that morphological and genetic evidence support recognition of a new species of louse, Geomydoecus pricei.
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Affiliation(s)
- James W Demastes
- Department of Biology, University of Northern Iowa, Cedar Falls, Iowa 50614, USA.
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