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van der Merwe NA, Phakalatsane T, Wilken PM. The Unique Homothallic Mating-Type Loci of the Fungal Tree Pathogens Chrysoporthe syzygiicola and Chrysoporthe zambiensis from Africa. Genes (Basel) 2023; 14:1158. [PMID: 37372338 DOI: 10.3390/genes14061158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 06/29/2023] Open
Abstract
Chrysoporthe syzygiicola and C. zambiensis are ascomycete tree pathogens first described from Zambia, causing stem canker on Syzygium guineense and Eucalyptus grandis, respectively. The taxonomic descriptions of these two species were based on their anamorphic states, as no sexual states are known. The main purpose of this work was to use whole genome sequences to identify and define the mating-type (MAT1) loci of these two species. The unique MAT1 loci for C. zambiensis and C. syzygiicola consist of the MAT1-1-1, MAT1-1-2, and MAT1-2-1 genes, but the MAT1-1-3 gene is absent. Genes canonically associated with opposite mating types were present at the single mating-type locus, suggesting that C. zambiensis and C. syzygiicola have homothallic mating systems.
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Affiliation(s)
- Nicolaas A van der Merwe
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0028, South Africa
| | - Tshiamo Phakalatsane
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0028, South Africa
| | - P Markus Wilken
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0028, South Africa
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van Wyk S, Wingfield BD, De Vos L, van der Merwe NA, Steenkamp ET. Genome-Wide Analyses of Repeat-Induced Point Mutations in the Ascomycota. Front Microbiol 2021; 11:622368. [PMID: 33597932 PMCID: PMC7882544 DOI: 10.3389/fmicb.2020.622368] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/29/2020] [Indexed: 11/17/2022] Open
Abstract
The Repeat-Induced Point (RIP) mutation pathway is a fungus-specific genome defense mechanism that mitigates the deleterious consequences of repeated genomic regions and transposable elements (TEs). RIP mutates targeted sequences by introducing cytosine to thymine transitions. We investigated the genome-wide occurrence and extent of RIP with a sliding-window approach. Using genome-wide RIP data and two sets of control groups, the association between RIP, TEs, and GC content were contrasted in organisms capable and incapable of RIP. Based on these data, we then set out to determine the extent and occurrence of RIP in 58 representatives of the Ascomycota. The findings were summarized by placing each of the fungi investigated in one of six categories based on the extent of genome-wide RIP. In silico RIP analyses, using a sliding-window approach with stringent RIP parameters, implemented simultaneously within the same genetic context, on high quality genome assemblies, yielded superior results in determining the genome-wide RIP among the Ascomycota. Most Ascomycota had RIP and these mutations were particularly widespread among classes of the Pezizomycotina, including the early diverging Orbiliomycetes and the Pezizomycetes. The most extreme cases of RIP were limited to representatives of the Dothideomycetes and Sordariomycetes. By contrast, the genomes of the Taphrinomycotina and Saccharomycotina contained no detectable evidence of RIP. Also, recent losses in RIP combined with controlled TE proliferation in the Pezizomycotina subphyla may promote substantial genome enlargement as well as the formation of sub-genomic compartments. These findings have broadened our understanding of the taxonomic range and extent of RIP in Ascomycota and how this pathway affects the genomes of fungi harboring it.
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Affiliation(s)
| | | | | | | | - Emma T. Steenkamp
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
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van der Nest MA, Hlongwane N, Hadebe K, Chan WY, van der Merwe NA, De Vos L, Greyling B, Kooverjee BB, Soma P, Dzomba EF, Bradfield M, Muchadeyi FC. Breed Ancestry, Divergence, Admixture, and Selection Patterns of the Simbra Crossbreed. Front Genet 2021; 11:608650. [PMID: 33584805 PMCID: PMC7876384 DOI: 10.3389/fgene.2020.608650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 12/18/2020] [Indexed: 12/21/2022] Open
Abstract
In this study, we evaluated an admixed South African Simbra crossbred population, as well as the Brahman (Indicine) and Simmental (Taurine) ancestor populations to understand their genetic architecture and detect genomic regions showing signatures of selection. Animals were genotyped using the Illumina BovineLD v2 BeadChip (7K). Genomic structure analysis confirmed that the South African Simbra cattle have an admixed genome, composed of 5/8 Taurine and 3/8 Indicine, ensuring that the Simbra genome maintains favorable traits from both breeds. Genomic regions that have been targeted by selection were detected using the linkage disequilibrium-based methods iHS and Rsb. These analyses identified 10 candidate regions that are potentially under strong positive selection, containing genes implicated in cattle health and production (e.g., TRIM63, KCNA10, NCAM1, SMIM5, MIER3, and SLC24A4). These adaptive alleles likely contribute to the biological and cellular functions determining phenotype in the Simbra hybrid cattle breed. Our data suggested that these alleles were introgressed from the breed's original indicine and taurine ancestors. The Simbra breed thus possesses derived parental alleles that combine the superior traits of the founder Brahman and Simmental breeds. These regions and genes might represent good targets for ad-hoc physiological studies, selection of breeding material and eventually even gene editing, for improved traits in modern cattle breeds. This study represents an important step toward developing and improving strategies for selection and population breeding to ultimately contribute meaningfully to the beef production industry.
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Affiliation(s)
| | - Nompilo Hlongwane
- Biotechnology Platform, Agricultural Research Council, Pretoria, South Africa
| | - Khanyisile Hadebe
- Biotechnology Platform, Agricultural Research Council, Pretoria, South Africa
| | - Wai-Yin Chan
- Biotechnology Platform, Agricultural Research Council, Pretoria, South Africa
| | - Nicolaas A van der Merwe
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Lieschen De Vos
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Ben Greyling
- Animal Production, Agricultural Research Council, Pretoria, South Africa
| | | | - Pranisha Soma
- Animal Production, Agricultural Research Council, Pretoria, South Africa
| | - Edgar F Dzomba
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | | | - Farai C Muchadeyi
- Biotechnology Platform, Agricultural Research Council, Pretoria, South Africa
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Roux J, Kamgan Nkuekam G, Marincowitz S, van der Merwe NA, Uchida J, Wingfield MJ, Chen S. Cryphonectriaceae associated with rust-infected Syzygium jambos in Hawaii. MycoKeys 2020; 76:49-79. [PMID: 33505197 PMCID: PMC7790811 DOI: 10.3897/mycokeys.76.58406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 12/08/2020] [Indexed: 11/21/2022] Open
Abstract
Syzygium jambos (Myrtales, Myrtaceae) trees in Hawaii are severely affected by a rust disease caused by Austropuccinia psidii (Pucciniales, Sphaerophragmiaceae), but they are commonly co-infected with species of Cryphonectriaceae (Diaporthales). In this study, S. jambos and other trees in the Myrtales were examined on three Hawaiian Islands for the presence of Cryphonectriaceae. Bark samples with fruiting bodies were collected from infected trees and fungi were isolated directly from these structures. Pure cultures were produced and the fungi were identified using DNA sequence data for the internal transcribed spacer (ITS) region, part of the β-tubulin (BT1) gene and the transcription elongation factor-1α (TEF1) gene. Five species in three genera of Cryphonectriaceae were identified from Myrtaceae tree samples. These included Chrysoporthe deuterocubensis, Microthia havanensis and three previously-unknown taxa described here as Celoporthe hauoliensis sp. nov., Cel. hawaiiensis sp. nov. and Cel. paradisiaca sp. nov. Representative isolates of Cel. hauoliensis, Cel. hawaiiensis, Cel. paradisiaca, Chr. deuterocubensis and Mic. havanensis were used in artificial inoculation studies to consider their pathogenicity on S. jambos. Celoporthe hawaiiensis, Cel. paradisiaca and Chr. deuterocubensis produced lesions on young S. jambos trees in inoculation trials, suggesting that, together with A. psidii, they may contribute to the death of trees. Microsatellite markers were subsequently used to consider the diversity of Chr. deuterocubensis on the Islands and thus to gain insights into its possible origin in Hawaii. Isolates of this important Myrtaceae and particularly Eucalyptus pathogen were found to be clonal. This provides evidence that Chr. deuterocubensis was introduced to the Hawaiian Islands as a single introduction, from a currently unknown source.
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Affiliation(s)
- Jolanda Roux
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South AfricaUniversity of PretoriaPretoriaSouth Africa
| | - Gilbert Kamgan Nkuekam
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South AfricaUniversity of PretoriaPretoriaSouth Africa
| | - Seonju Marincowitz
- Department of Biochemistry, Genetics and Microbiology, FABI, University of Pretoria, Pretoria 0028, South AfricaUniversity of Hawaii at ManoaHonoluluUnited States of America
| | - Nicolaas A. van der Merwe
- Department of Biochemistry, Genetics and Microbiology, FABI, University of Pretoria, Pretoria 0028, South AfricaUniversity of Hawaii at ManoaHonoluluUnited States of America
| | - Janice Uchida
- Department of Plant and Environmental Protection Sciences, Tropical Plant Pathology Program, College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USAUniversity of PretoriaZhanjiangChina
| | - Michael J. Wingfield
- Department of Biochemistry, Genetics and Microbiology, FABI, University of Pretoria, Pretoria 0028, South AfricaUniversity of Hawaii at ManoaHonoluluUnited States of America
| | - ShuaiFei Chen
- Department of Biochemistry, Genetics and Microbiology, FABI, University of Pretoria, Pretoria 0028, South AfricaUniversity of Hawaii at ManoaHonoluluUnited States of America
- China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), ZhanJiang, 524022, GuangDong Province, ChinaChina Eucalypt Research Centre, Chinese Academy of ForestryZhanJiangChina
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van Wyk S, Wingfield BD, De Vos L, van der Merwe NA, Santana QC, Steenkamp ET. Repeat-Induced Point Mutations Drive Divergence between Fusarium circinatum and Its Close Relatives. Pathogens 2019; 8:pathogens8040298. [PMID: 31847413 PMCID: PMC6963459 DOI: 10.3390/pathogens8040298] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 01/01/2023] Open
Abstract
The Repeat-Induced Point (RIP) mutation pathway is a fungal-specific genome defense mechanism that counteracts the deleterious effects of transposable elements. This pathway permanently mutates its target sequences by introducing cytosine to thymine transitions. We investigated the genome-wide occurrence of RIP in the pitch canker pathogen, Fusarium circinatum, and its close relatives in the Fusarium fujikuroi species complex (FFSC). Our results showed that the examined fungi all exhibited hallmarks of RIP, but that they differed in terms of the extent to which their genomes were affected by this pathway. RIP mutations constituted a large proportion of all the FFSC genomes, including both core and dispensable chromosomes, although the latter were generally more extensively affected by RIP. Large RIP-affected genomic regions were also much more gene sparse than the rest of the genome. Our data further showed that RIP-directed sequence diversification increased the variability between homologous regions of related species, and that RIP-affected regions can interfere with homologous recombination during meiosis, thereby contributing to post-mating segregation distortion. Taken together, these findings suggest that RIP can drive the independent divergence of chromosomes, alter chromosome architecture, and contribute to the divergence among F. circinatum and other members of this economically important group of fungi.
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Song J, Liang JF, Mehrabi-Koushki M, Krisai-Greilhuber I, Ali B, Bhatt VK, Cerna-Mendoza A, Chen B, Chen ZX, Chu HL, Corazon-Guivin MA, da Silva GA, De Kesel A, Dima B, Dovana F, Farokhinejad R, Ferisin G, Guerrero-Abad JC, Guo T, Han LH, Ilyas S, Justo A, Khalid AN, Khodadadi-Pourarpanahi S, Li TH, Liu C, Lorenzini M, Lu JK, Mumtaz AS, Oehl F, Pan XY, Papp V, Qian W, Razaq A, Semwal KC, Tang LZ, Tian XL, Vallejos-Tapullima A, van der Merwe NA, Wang SK, Wang CQ, Yang RH, Yu F, Zapparoli G, Zhang M, Antonín V, Aptroot A, Aslan A, Banerjee A, Chatterjee S, Dirks AC, Ebrahimi L, Fotouhifar KB, Ghosta Y, Kalinina LB, Karahan D, Liu J, Maiti MK, Mookherjee A, Nath PS, Panja B, Saha J, Ševčíková H, Voglmayr H, Yazıcı K, Haelewaters D. Fungal Systematics and Evolution: FUSE 5. Sydowia 2019; 71:141-245. [PMID: 31975743 PMCID: PMC6978154 DOI: 10.12905/0380.sydowia71-2019-0141] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Thirteen new species are formally described: Cortinarius brunneocarpus from Pakistan, C. lilacinoarmillatus from India, Curvularia khuzestanica on Atriplex lentiformis from Iran, Gloeocantharellus neoechinosporus from China, Laboulbenia bernaliana on species of Apenes, Apristus, and Philophuga (Coleoptera, Carabidae) from Nicaragua and Panama, L. oioveliicola on Oiovelia machadoi (Hemiptera, Veliidae) from Brazil, L. termiticola on Macrotermes subhyalinus (Blattodea, Termitidae) from the DR Congo, Pluteus cutefractus from Slovenia, Rhizoglomus variabile from Peru, Russula phloginea from China, Stagonosporopsis flacciduvarum on Vitis vinifera from Italy, Strobilomyces huangshanensis from China, Uromyces klotzschianus on Rumex dentatus subsp. klotzschianus from Pakistan. The following new records are reported: Alternaria calendulae on Calendula officinalis from India; A. tenuissima on apple and quince fruits from Iran; Candelariella oleaginescens from Turkey; Didymella americana and D. calidophila on Vitis vinifera from Italy; Lasiodiplodia theobromae causing tip blight of Dianella tasmanica 'variegata' from India; Marasmiellus subpruinosus from Madeira, Portugal, new for Macaronesia and Africa; Mycena albidolilacea, M. tenuispinosa, and M. xantholeuca from Russia; Neonectria neomacrospora on Madhuca longifolia from India; Nothophoma quercina on Vitis vinifera from Italy; Plagiosphaera immersa on Urtica dioica from Austria; Rinodina sicula from Turkey; Sphaerosporium lignatile from Wisconsin, USA; and Verrucaria murina from Turkey. Multi-locus analysis of ITS, LSU, rpb1, tef1 sequences revealed that P. immersa, commonly classified within Gnomoniaceae (Diaporthales) or as Sordariomycetes incertae sedis, belongs to Magnaporthaceae (Magnaporthales). Analysis of a six-locus Ascomycota-wide dataset including SSU and LSU sequences of S. lignatile revealed that this species, currently in Ascomycota incertae sedis, belongs to Pyronemataceae (Pezizomycetes, Pezizales).
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Affiliation(s)
- Jie Song
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Jun-Feng Liang
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Mehdi Mehrabi-Koushki
- Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
- Biotechnology and Bioscience Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | | | - Barkat Ali
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
- Department of Biochemistry, Genetics and Microbiology, Division of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria 0028, South Africa
| | | | - Agustín Cerna-Mendoza
- Laboratorio de Biología y Genética Molecular, Universidad Nacional de San Martín, Jr. Amorarca 315, Morales, Peru
| | - Bin Chen
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Zai-Xiong Chen
- Management Bureau of Danxiashan National Nature Reserve of Guangdong, Shaoguan 512300, China
| | - Hong-Long Chu
- College of Biological Resource and Food Engineering, Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan 655011, China
| | - Mike Anderson Corazon-Guivin
- Laboratorio de Biología y Genética Molecular, Universidad Nacional de San Martín, Jr. Amorarca 315, Morales, Peru
| | - Gladstone Alves da Silva
- Departamento de Micologia, CB, Universidade Federal de Pernambuco, Av. da engenharia s/n, Cidade Universitária, 50740-600, Recife, PE, Brazil
| | - André De Kesel
- Meise Botanic Garden, Nieuwelaan 38, 1860 Meise, Belgium
| | - Bálint Dima
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Francesco Dovana
- Department of Life Sciences and Systems Biology, University of Torino, Viale P.A. Mattioli 25, I-10125 Torino, Italy
| | - Reza Farokhinejad
- Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | | | - Juan Carlos Guerrero-Abad
- Laboratorio de Biología y Genética Molecular, Universidad Nacional de San Martín, Jr. Amorarca 315, Morales, Peru
- Instituto Nacional de Innovación Agraria (INIA). Dirección General de Recursos Genéticos y Biotecnología. Av. La Molina 1981, La Molina - Lima, Peru
| | - Ting Guo
- Key Laboratory of Edible Fungal Resources and Utilization (South), National Engineering Research Center of Edible Fungi, Key Laboratory of Agricultural Genetics and Breeding of Shanghai, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Li-Hong Han
- College of Biological Resource and Food Engineering, Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan 655011, China
| | - Sobia Ilyas
- Department of Botany, Lahore College for Women University, Lahore, Pakistan
| | - Alfredo Justo
- New Brunswick Museum, 277 Douglas Ave., Saint John, New Brunswick, E2K 1E5, Canada
| | | | | | - Tai-Hui Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application & Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China
| | - Chao Liu
- College of Biological Resource and Food Engineering, Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan 655011, China
| | | | - Jun-Kun Lu
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Abdul Samad Mumtaz
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Fritz Oehl
- Agroscope, Competence Division for Plants and Plant Products, Ecotoxicology, Müller-Thurgau-Strasse 29, CH-8820 Wädenswil, Switzerland
| | - Xue-Yu Pan
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Viktor Papp
- Department of Botany, Szent István University, H-1518 Budapest, Hungary
| | - Wu Qian
- Bureau of Parks and Woods of Mt. Huangshan Administrative Committee, Huangshan, Anhui 245000, China
| | - Abdul Razaq
- Discipline of Botany, Faculty of Fisheries and Wildlife, University of Veterinary and Animal Sciences (UVAS), Ravi Campus, Pattoki, Pakistan
| | - Kamal C. Semwal
- Department of Biology, College of Sciences, Eritrea Institute of Technology, Mai Nafhi, Asmara, Eritrea
| | - Li-Zhou Tang
- College of Biological Resource and Food Engineering, Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan 655011, China
| | - Xue-Lian Tian
- College of Biological Resource and Food Engineering, Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan 655011, China
| | - Adela Vallejos-Tapullima
- Laboratorio de Biología y Genética Molecular, Universidad Nacional de San Martín, Jr. Amorarca 315, Morales, Peru
| | - Nicolaas A. van der Merwe
- Department of Biochemistry, Genetics and Microbiology, Division of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria 0028, South Africa
| | - Sheng-Kun Wang
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Chao-Qun Wang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application & Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China
| | - Rui-Heng Yang
- Key Laboratory of Edible Fungal Resources and Utilization (South), National Engineering Research Center of Edible Fungi, Key Laboratory of Agricultural Genetics and Breeding of Shanghai, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Fei Yu
- Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, P.R. China
| | - Giacomo Zapparoli
- Università degli Studi di Verona, Dipartimento di Biotecnologie, Italy
| | - Ming Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application & Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China
| | - Vladimir Antonín
- Department of Botany, Moravian Museum, Zelný trh 6, CZ-659 37 Brno, Czech Republic
| | - André Aptroot
- ABL Herbarium G.v.d.Veenstraat, 107 NL-3762, XK Soest, The Netherlands
| | - Ali Aslan
- Yüzüncü Yıl University, Faculty of Pharmacy, 65080 Campus, Van, Turkey; Kyrgyz-Turkish Manas University, Faculty of Arts and Science, Dept. of Biology, Bishkek, Kyrgyzstan
| | - Arghya Banerjee
- Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741252, West Bengal, India
| | - Subrata Chatterjee
- Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741252, West Bengal, India
| | - Alden C. Dirks
- Department of Ecology and Evolutionary Biology, University of Michigan, 1105 North University Avenue, 4050 Biological Sciences Building, Ann Arbor, MI 48109, USA
| | - Leila Ebrahimi
- Department of Entomology and Plant Pathology, Aburaihan Campus, University of Tehran, Tehran, 33916-53755, Iran
| | - Khalil-Berdi Fotouhifar
- Department of Plant Protection, Faculty of Agricultural Sciences and Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, 31587-77871, Iran
| | - Youbert Ghosta
- Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, P. O. Box 165, Iran
| | - Lyudmila B. Kalinina
- Russian Academy of Sciences, Komarov Botanical Institute, Prof. Popov Str. 2, St. Petersburg RU-197376, Russia
| | - Dilara Karahan
- Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Jingyu Liu
- Department of Botany and Plant Pathology, Purdue University, 915 W. State Street, West Lafayette, IN 47907, USA
| | - Mrinal Kumar Maiti
- Department of Biotechnology, Indian Institute of Technology Kharagpur, 721302, West Bengal, India
| | - Abhirup Mookherjee
- Department of Biotechnology, Indian Institute of Technology Kharagpur, 721302, West Bengal, India
| | - Partha Sarathi Nath
- Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741252, West Bengal, India
| | - Birendranath Panja
- Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741252, West Bengal, India
| | - Jayanta Saha
- Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Nadia-741252, West Bengal, India
| | - Hana Ševčíková
- Department of Botany, Moravian Museum, Zelný trh 6, CZ-659 37 Brno, Czech Republic
| | - Hermann Voglmayr
- Department of Botany and Biodiversity Research, Universität Wien, Rennweg 14, 1030 Wien, Austria
- Institute of Forest Entomology, Forest Pathology and Forest Protection, BOKU-University of Natural Resources and Life Sciences, Peter-Jordan-Straße 82/I, 1190 Wien, Austria
| | - Kenan Yazıcı
- Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Danny Haelewaters
- Department of Botany and Plant Pathology, Purdue University, 915 W. State Street, West Lafayette, IN 47907, USA
- Harvard University Herbaria, 22 Divinity Avenue, Cambridge, MA 02138, USA
- Herbario UCH, Universidad Autónoma de Chiriquí, Apartado Postal 0427, David, Panama
- Smithsonian Tropical Research Institute, Apartado Postal 0843-03092, Balboa, Panama
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7
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van Wyk S, Harrison CH, Wingfield BD, De Vos L, van der Merwe NA, Steenkamp ET. The RIPper, a web-based tool for genome-wide quantification of Repeat-Induced Point (RIP) mutations. PeerJ 2019; 7:e7447. [PMID: 31523495 PMCID: PMC6714961 DOI: 10.7717/peerj.7447] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 07/09/2019] [Indexed: 12/24/2022] Open
Abstract
Background The RIPper (http://theripper.hawk.rocks) is a set of web-based tools designed for analyses of Repeat-Induced Point (RIP) mutations in the genome sequences of Ascomycota. The RIP pathway is a fungal genome defense mechanism that is aimed at identifying repeated and duplicated motifs, into which it then introduces cytosine to thymine transition mutations. RIP thus serves to deactivate and counteract the deleterious consequences of selfish or mobile DNA elements in fungal genomes. The occurrence, genetic context and frequency of RIP mutations are widely used to assess the activity of this pathway in genomic regions of interest. Here, we present a bioinformatics tool that is specifically fashioned to automate the investigation of changes in RIP product and substrate nucleotide frequencies in fungal genomes. Results We demonstrated the ability of The RIPper to detect the occurrence and extent of RIP mutations in known RIP affected sequences. Specifically, a sliding window approach was used to perform genome-wide RIP analysis on the genome assembly of Neurospora crassa. Additionally, fine-scale analysis with The RIPper showed that gene regions and transposable element sequences, previously determined to be affected by RIP, were indeed characterized by high frequencies of RIP mutations. Data generated using this software further showed that large proportions of the N. crassa genome constitutes RIP mutations with extensively affected regions displaying reduced GC content. The RIPper was further useful for investigating and visualizing changes in RIP mutations across the length of sequences of interest, allowing for fine-scale analyses. Conclusion This software identified RIP targeted genomic regions and provided RIP statistics for an entire genome assembly, including the genomic proportion affected by RIP. Here, we present The RIPper as an efficient tool for genome-wide RIP analyses.
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Affiliation(s)
- Stephanie van Wyk
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, Gauteng, South Africa
| | - Christopher H Harrison
- Department of product and software development, Amplo PTY, Pretoria, Gauteng, South Africa
| | - Brenda D Wingfield
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, Gauteng, South Africa
| | - Lieschen De Vos
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, Gauteng, South Africa
| | - Nicolaas A van der Merwe
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, Gauteng, South Africa
| | - Emma T Steenkamp
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, Gauteng, South Africa
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8
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Wingfield BD, Berger DK, Steenkamp ET, Lim HJ, Duong TA, Bluhm BH, de Beer ZW, De Vos L, Fourie G, Naidoo K, Olivier N, Lin YC, Van de Peer Y, Joubert F, Crampton BG, Swart V, Soal N, Tatham C, van der Nest MA, van der Merwe NA, van Wyk S, Wilken PM, Wingfield MJ. IMA Genome-F 8: Draft genome of Cercospora zeina, Fusarium pininemorale, Hawksworthiomyces lignivorus, Huntiella decipiens and Ophiostoma ips. IMA Fungus 2017; 8:385-396. [PMID: 29242781 PMCID: PMC5729718 DOI: 10.5598/imafungus.2017.08.02.10] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 11/09/2017] [Indexed: 11/29/2022] Open
Abstract
The genomes of Cercospora zeina, Fusarium pininemorale, Hawksworthiomyces lignivorus, Huntiella decipiens, and Ophiostoma ips are presented in this genome announcement. Three of these genomes are from plant pathogens and otherwise economically important fungal species. Fusarium pininemorale and H. decipiens are not known to cause significant disease but are closely related to species of economic importance. The genome sizes range from 25.99 Mb in the case of O. ips to 4.82 Mb for H. lignivorus. These genomes include the first reports of a genome from the genus Hawksworthiomyces. The availability of these genome data will allow the resolution of longstanding questions regarding the taxonomy of these species. In addition these genome sequences through comparative studies with closely related organisms will increase our understanding of how these species or close relatives cause disease.
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Affiliation(s)
- Brenda D. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Dave K. Berger
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Emma T. Steenkamp
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Hye-Jin Lim
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Tuan A. Duong
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Burton H. Bluhm
- Department of Plant Pathology, University of Arkansas, Fayetteville, USA
| | - Z. Wilhelm de Beer
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Lieschen De Vos
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - G. Fourie
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Kershney Naidoo
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Nicky Olivier
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
- Centre for Bioinformatics and Computational Biology, Department of Biochemistry, University of Pretoria, Pretoria, South Africa
| | - Yao-Cheng Lin
- VIB Department of Plant Systems Biology, Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
| | - Yves Van de Peer
- VIB Department of Plant Systems Biology, Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Department of Genetics, Genomics Research Institute, University of Pretoria, Pretoria, South Africa
| | - Fourie Joubert
- Centre for Bioinformatics and Computational Biology, Department of Biochemistry, University of Pretoria, Pretoria, South Africa
| | - Bridget G. Crampton
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Velushka Swart
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Nicole Soal
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Catherine Tatham
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Magriet A. van der Nest
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Nicolaas A. van der Merwe
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Stephanie van Wyk
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - P. Markus Wilken
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Michael J. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
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9
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Zwart L, Berger DK, Moleleki LN, van der Merwe NA, Myburg AA, Naidoo S. Evidence for salicylic acid signalling and histological changes in the defence response of Eucalyptus grandis to Chrysoporthe austroafricana. Sci Rep 2017; 7:45402. [PMID: 28349984 PMCID: PMC5368643 DOI: 10.1038/srep45402] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 02/23/2017] [Indexed: 12/16/2022] Open
Abstract
Eucalyptus species are cultivated for forestry and are of economic importance. The fungal stem canker pathogen Chrysoporthe austroafricana causes disease of varying severity on E. grandis. The Eucalyptus grandis-Chrysoporthe austroafricana interaction has been established as a model system for studying Eucalyptus antifungal defence. Previous studies revealed that the phytohormone salicylic acid (SA) affects the levels of resistance in highly susceptible (ZG14) and moderately resistant (TAG5) clones. The aims of this study were to examine histochemical changes in response to wounding and inoculation as well as host responses at the protein level. The anatomy and histochemical changes induced by wounding and inoculation were similar between the clones, suggesting that anatomical differences do not underlie their different levels of resistance. Tyloses and gum-like substances were present after inoculation and wounding, but cell death occurred only after inoculation. Hyphae of C. austroafricana were observed inside dead and living cells, suggesting that the possibility of a hemibiotrophic interaction requires further investigation. Proteomics analysis revealed the possible involvement of proteins associated with cell death, SA signalling and systemic resistance. In combination with previous information, this study forms a basis for future functional characterisation of candidate genes involved in resistance of E. grandis to C. austroafricana.
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Affiliation(s)
- Lizahn Zwart
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Pretoria, South Africa
| | - Dave Kenneth Berger
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Pretoria, South Africa
| | - Lucy Novungayo Moleleki
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Nicolaas A. van der Merwe
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Pretoria, South Africa
| | - Alexander A. Myburg
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Pretoria, South Africa
| | - Sanushka Naidoo
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Pretoria, South Africa
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10
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Mangwanda R, Zwart L, van der Merwe NA, Moleleki LN, Berger DK, Myburg AA, Naidoo S. Localization and Transcriptional Responses of Chrysoporthe austroafricana in Eucalyptus grandis Identify Putative Pathogenicity Factors. Front Microbiol 2016; 7:1953. [PMID: 28008326 PMCID: PMC5143476 DOI: 10.3389/fmicb.2016.01953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 11/21/2016] [Indexed: 12/18/2022] Open
Abstract
Chrysoporthe austroafricana is a fungal pathogen that causes the development of stem cankers on susceptible Eucalyptus grandis trees. Clones of E. grandis that are partially resistant and highly susceptible have been identified based on the extent of lesion formation on the stem upon inoculation with C. austroafricana. These interactions have been used as a model pathosystem to enhance our understanding of interactions between pathogenic fungi and woody hosts, which may be different to herbaceous hosts. In previous research, transcriptomics of host responses in these two clones to C. austroafricana suggested roles for salicylic acid and gibberellic acid phytohormone signaling in defense. However, it is unclear how the pathogen infiltrates host tissue and which pathogenicity factors facilitate its spread in the two host genotypes. The aim of this study was to investigate these two aspects of the E. grandis-C. austroafricana interaction and to test the hypothesis that the pathogen possesses mechanisms to modulate the tree phytohormone-mediated defenses. Light microscopy showed that the pathogen occurred in most cell types and structures within infected E. grandis stem tissue. Notably, the fungus appeared to spread through the stem by penetrating cell wall pits. In order to understand the molecular interaction between these organisms and predict putative pathogenicity mechanisms of C. austroafricana, fungal gene expression was studied in vitro and in planta. Fungal genes associated with cell wall degradation, carbohydrate metabolism and phytohormone manipulation were expressed in planta by C. austroafricana. These genes could be involved in fungal spread by facilitating cell wall pit degradation and manipulating phytohormone mediated defense in each host environment, respectively. Specifically, the in planta expression of an ent-kaurene oxidase and salicylate hydroxylase in C. austroafricana suggests putative mechanisms by which the pathogen can modulate the phytohormone-mediated defenses of the host. These mechanisms have been reported in herbaceous plant-pathogen interactions, supporting the notion that these aspects of the interaction are similar in a woody species. This study highlights ent-kaurene oxidase and salicylate hydroxylase as candidates for further functional characterization.
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Affiliation(s)
- Ronishree Mangwanda
- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Genomics Research Institute, University of PretoriaPretoria, South Africa
| | - Lizahn Zwart
- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Genomics Research Institute, University of PretoriaPretoria, South Africa
| | - Nicolaas A. van der Merwe
- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Genomics Research Institute, University of PretoriaPretoria, South Africa
| | - Lucy Novungayo Moleleki
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute, University of PretoriaPretoria, South Africa
| | - Dave Kenneth Berger
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute, Genomics Research Institute, University of PretoriaPretoria, South Africa
| | - Alexander A. Myburg
- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Genomics Research Institute, University of PretoriaPretoria, South Africa
| | - Sanushka Naidoo
- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Genomics Research Institute, University of PretoriaPretoria, South Africa
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11
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Wingfield BD, Barnes I, Wilhelm de Beer Z, De Vos L, Duong TA, Kanzi AM, Naidoo K, Nguyen HD, Santana QC, Sayari M, Seifert KA, Steenkamp ET, Trollip C, van der Merwe NA, van der Nest MA, Markus Wilken P, Wingfield MJ. IMA Genome-F 5: Draft genome sequences of Ceratocystis eucalypticola, Chrysoporthe cubensis, C. deuterocubensis, Davidsoniella virescens, Fusarium temperatum,Graphilbum fragrans, Penicillium nordicum, and Thielaviopsis musarum. IMA Fungus 2015; 6:493-506. [PMID: 26734552 PMCID: PMC4681265 DOI: 10.5598/imafungus.2015.06.02.13] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 11/23/2015] [Indexed: 12/05/2022] Open
Abstract
The genomes of Ceratocystis eucalypticola, Chrysoporthe cubensis, Chrysoporthe deuterocubensis, Davidsoniella virescens, Fusarium temperatum, Graphilbum fragrans, Penicillium nordicum and Thielaviopsis musarum are presented in this genome announcement. These seven genomes are from plant pathogens and otherwise economically important fungal species. The genome sizes range from 28 Mb in the case of T. musarum to 45 Mb for Fusarium temperatum. These genomes include the first reports of genomes for the genera Davidsoniella, Graphilbum and Thielaviopsis. The availability of these genome data will provide opportunities to resolve longstanding questions regarding the taxonomy of species in these genera. In addition these genome sequences through comparative studies with closely related organisms will increase our understanding of how these pathogens cause disease.
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Affiliation(s)
- Brenda D. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Irene Barnes
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Z. Wilhelm de Beer
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Lieschen De Vos
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Tuan A. Duong
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Aquillah M. Kanzi
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Kershney Naidoo
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Hai D.T. Nguyen
- Biodiversity (Mycology), Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada
| | - Quentin C. Santana
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Mohammad Sayari
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Keith A. Seifert
- Biodiversity (Mycology), Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada
| | - Emma T. Steenkamp
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Conrad Trollip
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Nicolaas A. van der Merwe
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Magriet A. van der Nest
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - P. Markus Wilken
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
| | - Michael J. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, 0028 South Africa
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12
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Baron S, van der Merwe NA, Madder M, Maritz-Olivier C. SNP Analysis Infers that Recombination Is Involved in the Evolution of Amitraz Resistance in Rhipicephalus microplus. PLoS One 2015; 10:e0131341. [PMID: 26158272 PMCID: PMC4497657 DOI: 10.1371/journal.pone.0131341] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 06/01/2015] [Indexed: 12/01/2022] Open
Abstract
Rhipicephalus microplus, better known as the Asiatic cattle tick, is a largely invasive ectoparasite of great economic importance due to the negative effect it has on agricultural livestock on a global scale, particularly cattle. Tick-borne diseases (babesiosis and anaplasmosis) transmitted by R. microplus are alarming as they decrease the quality of livestock health and production. In sub-Saharan Africa, cattle represent a major source of meat and milk, but this region of the world is severely affected by the Rhipicephalus microplus tick. The principal method for tick control is the use of chemical acaricides, notably amitraz, which was implemented in the 1990’s after resistance to other acaricides surfaced. However, the efficiency of chemical control is hindered by an increase in the frequency of mutant resistance alleles to amitraz in tick populations. Presently, the only way to assess amitraz resistance is by means of larval packet tests, but this technique is time-consuming and not particularly cost effective. The main aims of this study were three-fold. First, we attempted to correlate two known SNPs in the octopamine/tyramine (OCT/Tyr) receptor with amitraz resistance in South African field samples of R. microplus. Second, we calculated gametic disequilibrium for these SNPs to determine whether they are randomly associated. Lastly, we conducted a study to assess the evolutionary effects of recombination within the OCT/Tyr receptor. Our results confirmed that the two SNPs are associated with amitraz resistance in the South African tick strain, and that they are in gametic disequilibrium. Additionally, recombination was detected in the OCT/Tyr receptor generating two recombinant haplotypes. These results are of concern to farmers in sub-Saharan Africa, and the emergence of amitraz resistance should be closely monitored in future. Therefore, we present a quick and affordable RFLP based diagnostic technique to assess amitraz resistance in field samples of R. microplus.
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Affiliation(s)
- Samantha Baron
- Department of Genetics, University of Pretoria, Pretoria, South Africa
| | | | - Maxime Madder
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Department of Veterinary Tropical Diseases, University of Pretoria, Pretoria, South Africa
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Wingfield BD, Ades PK, Al-Naemi FA, Beirn LA, Bihon W, Crouch JA, de Beer ZW, De Vos L, Duong TA, Fields CJ, Fourie G, Kanzi AM, Malapi-Wight M, Pethybridge SJ, Radwan O, Rendon G, Slippers B, Santana QC, Steenkamp ET, Taylor PW, Vaghefi N, van der Merwe NA, Veltri D, Wingfield MJ. IMA Genome-F 4: Draft genome sequences of Chrysoporthe austroafricana, Diplodia scrobiculata, Fusarium nygamai, Leptographium lundbergii, Limonomyces culmigenus, Stagonosporopsis tanaceti, and Thielaviopsis punctulata. IMA Fungus 2015; 6:233-48. [PMID: 26203426 PMCID: PMC4500086 DOI: 10.5598/imafungus.2015.06.01.15] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 06/16/2015] [Indexed: 12/15/2022] Open
Abstract
The genomes of Chrysoporthe austroafricana, Diplodia scrobiculata, Fusarium nygami, Leptographium lundbergii, Limonomyces culmigenus, Stagonosporopsis tanaceti, and Thielaviopsis punctulata are presented in this genome announcement. These seven genomes are from endophytes, plant pathogens and economically important fungal species. The genome sizes range from 26.6 Mb in the case of Leptographium lundbergii to 44 Mb for Chrysoporthe austroafricana. The availability of these genome data will provide opportunities to resolve longstanding questions regarding the taxonomy of species in these genera, and may contribute to our understanding of the lifestyles through comparative studies with closely related organisms.
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Affiliation(s)
- Brenda D. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Peter K. Ades
- Department of Forest and Ecosystem Science, The University of Melbourne, Victoria, 3010, Australia
| | - Fatima A. Al-Naemi
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha, Qatar
| | - Lisa A. Beirn
- Department of Plant Biology and Pathology, Rutgers University, 59 Dudley Road, New Brunswick, NJ 08901, USA
| | - Wubetu Bihon
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. bag x20, Pretoria 0028, South Africa
- Agricultural Research Council, Vegetable and Ornamental Plant Institute, P. Bag X293, Pretoria 0001, South Africa
| | - Jo Anne Crouch
- Systematic Mycology and Microbiology Laboratory, U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS), Beltsville, MD 20705, USA
| | - Z. Wilhelm de Beer
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. bag x20, Pretoria 0028, South Africa
| | - Lieschen De Vos
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Tuan A. Duong
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Christopher J. Fields
- High Performance Biological Computing Group, Roy J. Carver Biotechnology Center/W.M. Keck Center, University of Illinois at Urbana-Champaign, IL, USA
| | - Gerda Fourie
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. bag x20, Pretoria 0028, South Africa
| | - Aquillah M. Kanzi
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Martha Malapi-Wight
- Systematic Mycology and Microbiology Laboratory, U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS), Beltsville, MD 20705, USA
| | - Sarah J. Pethybridge
- School of Integrative Plant Sciences, Plant Pathology & Plant-Microbe Biology Section, Cornell University, Geneva, NY, 14456, USA
| | - Osman Radwan
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, IL, USA and Department of Plant Production, College of Technology, Zagazig University, Sharkia, Egypt
| | - Gloria Rendon
- High Performance Biological Computing Group, Roy J. Carver Biotechnology Center/W.M. Keck Center, University of Illinois at Urbana-Champaign, IL, USA
| | - Bernard Slippers
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Quentin C. Santana
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Emma T. Steenkamp
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. bag x20, Pretoria 0028, South Africa
| | - Paul W.J. Taylor
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria, 3010, Australia
| | - Niloofar Vaghefi
- School of Integrative Plant Sciences, Plant Pathology & Plant-Microbe Biology Section, Cornell University, Geneva, NY, 14456, USA
| | - Nicolaas A. van der Merwe
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - Daniel Veltri
- Systematic Mycology and Microbiology Laboratory, U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS), Beltsville, MD 20705, USA
- Oak Ridge Laboratories ARS Research Participation Program, USDA-ARS, Beltsville, MD 20705, USA
| | - Michael J. Wingfield
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. bag x20, Pretoria 0028, South Africa
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De Vos L, Steenkamp ET, Martin SH, Santana QC, Fourie G, van der Merwe NA, Wingfield MJ, Wingfield BD. Genome-wide macrosynteny among Fusarium species in the Gibberella fujikuroi complex revealed by amplified fragment length polymorphisms. PLoS One 2014; 9:e114682. [PMID: 25486277 PMCID: PMC4259476 DOI: 10.1371/journal.pone.0114682] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 11/12/2014] [Indexed: 01/28/2023] Open
Abstract
The Gibberella fujikuroi complex includes many Fusarium species that cause significant losses in yield and quality of agricultural and forestry crops. Due to their economic importance, whole-genome sequence information has rapidly become available for species including Fusarium circinatum, Fusarium fujikuroi and Fusarium verticillioides, each of which represent one of the three main clades known in this complex. However, no previous studies have explored the genomic commonalities and differences among these fungi. In this study, a previously completed genetic linkage map for an interspecific cross between Fusarium temperatum and F. circinatum, together with genomic sequence data, was utilized to consider the level of synteny between the three Fusarium genomes. Regions that are homologous amongst the Fusarium genomes examined were identified using in silico and pyrosequenced amplified fragment length polymorphism (AFLP) fragment analyses. Homology was determined using BLAST analysis of the sequences, with 777 homologous regions aligned to F. fujikuroi and F. verticillioides. This also made it possible to assign the linkage groups from the interspecific cross to their corresponding chromosomes in F. verticillioides and F. fujikuroi, as well as to assign two previously unmapped supercontigs of F. verticillioides to probable chromosomal locations. We further found evidence of a reciprocal translocation between the distal ends of chromosome 8 and 11, which apparently originated before the divergence of F. circinatum and F. temperatum. Overall, a remarkable level of macrosynteny was observed among the three Fusarium genomes, when comparing AFLP fragments. This study not only demonstrates how in silico AFLPs can aid in the integration of a genetic linkage map to the physical genome, but it also highlights the benefits of using this tool to study genomic synteny and architecture.
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Affiliation(s)
- Lieschen De Vos
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Emma T Steenkamp
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Simon H Martin
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Quentin C Santana
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Gerda Fourie
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Nicolaas A van der Merwe
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Michael J Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
| | - Brenda D Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria, South Africa
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Fourie G, van der Merwe NA, Wingfield BD, Bogale M, Tudzynski B, Wingfield MJ, Steenkamp ET. Evidence for inter-specific recombination among the mitochondrial genomes of Fusarium species in the Gibberella fujikuroi complex. BMC Genomics 2013; 14:605. [PMID: 24010864 PMCID: PMC3847072 DOI: 10.1186/1471-2164-14-605] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 09/04/2013] [Indexed: 12/31/2022] Open
Abstract
Background The availability of mitochondrial genomes has allowed for the resolution of numerous questions regarding the evolutionary history of fungi and other eukaryotes. In the Gibberella fujikuroi species complex, the exact relationships among the so-called “African”, “Asian” and “American” Clades remain largely unresolved, irrespective of the markers employed. In this study, we considered the feasibility of using mitochondrial genes to infer the phylogenetic relationships among Fusarium species in this complex. The mitochondrial genomes of representatives of the three Clades (Fusarium circinatum, F. verticillioides and F. fujikuroi) were characterized and we determined whether or not the mitochondrial genomes of these fungi have value in resolving the higher level evolutionary relationships in the complex. Results Overall, the mitochondrial genomes of the three species displayed a high degree of synteny, with all the genes (protein coding genes, unique ORFs, ribosomal RNA and tRNA genes) in identical order and orientation, as well as introns that share similar positions within genes. The intergenic regions and introns generally contributed significantly to the size differences and diversity observed among these genomes. Phylogenetic analysis of the concatenated protein-coding dataset separated members of the Gibberella fujikuroi complex from other Fusarium species and suggested that F. fujikuroi (“Asian” Clade) is basal in the complex. However, individual mitochondrial gene trees were largely incongruent with one another and with the concatenated gene tree, because six distinct phylogenetic trees were recovered from the various single gene datasets. Conclusion The mitochondrial genomes of Fusarium species in the Gibberella fujikuroi complex are remarkably similar to those of the previously characterized Fusarium species and Sordariomycetes. Despite apparently representing a single replicative unit, all of the genes encoded on the mitochondrial genomes of these fungi do not share the same evolutionary history. This incongruence could be due to biased selection on some genes or recombination among mitochondrial genomes. The results thus suggest that the use of individual mitochondrial genes for phylogenetic inference could mask the true relationships between species in this complex.
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Affiliation(s)
- Gerda Fourie
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa.
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Louw E, van der Merwe NA, Neitz AWH, Maritz-Olivier C. Evolution of the tissue factor pathway inhibitor-like Kunitz domain-containing protein family in Rhipicephalus microplus. Int J Parasitol 2012; 43:81-94. [PMID: 23220044 DOI: 10.1016/j.ijpara.2012.11.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 11/14/2012] [Accepted: 11/15/2012] [Indexed: 01/26/2023]
Abstract
One of the principle mechanisms utilised by ticks to obtain a blood meal is the subversion of the host's haemostatic response. This is achieved through the secretion of saliva containing anti-haemostatic proteins into the feeding lesion. Lineage-specific expansion of predicted secretory protein families have been observed in all previously studied ticks and occurred in response to adaptation to a blood-feeding environment. Of these, the predominant families are common between both hard and soft ticks. One of these families, namely the Kunitz domain-containing protein family, includes proven tissue factor pathway inhibitor-like (TFPI-like) anti-haemostatics such as ixolaris and penthalaris that play a crucial role during tick feeding. Although Kunitz-type proteins have been found in Rhipicephalus microplus, the TFPI-like Kunitz protein family has not yet been studied. We report a comprehensive search for TFPI-like Kunitz domain-containing proteins in R. microplus expressed sequence tag libraries, resulting in the identification of 42 homologues. The homologues were bioinformatically and phylogenetically studied, including the application of an intensive Bayesian Markov Chain Monte Carlo (MCMC) analysis of the individual Kunitz domain nucleotide sequences. We show that the R. microplus TFPI-like Kunitz protein family groups into two main clades that presumably underwent ancient duplication, which indicates that a whole genome duplication event occurred at least 150 million years ago. Evidence for recent and ancient gene and domain duplication events was also found. Furthermore, the divergence times of the various tick lineages estimated in this paper correspond with those presented in previous studies. The elucidation of this large protein family's evolution within R. microplus adds to current knowledge of this economically important tick.
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Affiliation(s)
- Elizabeth Louw
- Department of Biochemistry, University of Pretoria, Pretoria, South Africa
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De Vos L, van der Nest MA, van der Merwe NA, Myburg AA, Wingfield MJ, Wingfield BD. Genetic analysis of growth, morphology and pathogenicity in the F(1) progeny of an interspecific cross between Fusarium circinatum and Fusarium subglutinans. Fungal Biol 2011; 115:902-8. [PMID: 21872187 DOI: 10.1016/j.funbio.2011.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 07/04/2011] [Accepted: 07/06/2011] [Indexed: 10/18/2022]
Abstract
Fusarium circinatum and Fusarium subglutinans are two distinct species in the Gibberella fujikuroi species complex. A genetic linkage map produced from an interspecific cross between these species was used to identify quantitative trait loci (QTLs) associated with variation in mycelial growth and morphology of colony margins (CMs) in the 94 F(1) progeny. Mycelial growth was assessed by measuring culture size at 25°C and 30°C, while CM morphology was characterized in the parents and assessed in their F(1) progeny. In order to test the pathogenicity of the progeny, Pinus patula seedlings were inoculated and lesion lengths were measured after 3weeks. Seven putative QTLs were associated with mycelial growth, three for growth at 25°C and four at 30°C. One highly significant QTL (P<0.001) was present at both growth temperatures. For CM morphology, a QTL was identified at the same position (P<0.001) as the QTL responsible for growth at the two temperatures. The putative QTLs accounted for 45 and 41% of the total mycelial growth variation at 25°C and 30°C, respectively, and for 21% of the variation in CM morphology. Only one of the 94 F(1) progeny was pathogenic on P. patula seedlings. This observation could be explained by the genetic constitution of this F(1) isolate, namely that ∼96% of its genome originated from the F. circinatum parent. This F(1) individual also grew significantly faster at 25°C than the F. circinatum parent (P<0.05), as well as more rapidly than the average growth for the remaining 93 F(1) progeny (P<0.05). However, no association was found between mycelial growth and pathogenicity at 25°C. The highly significant QTL associated with growth at two temperatures, suggests that this is a principal genomic region involved in mycelial growth at both temperatures, and that the same region is also responsible for CM morphology.
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Affiliation(s)
- Lieschen De Vos
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Hillcrest, South Africa.
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van der Merwe NA, Gryzenhout M, Steenkamp ET, Wingfield BD, Wingfield MJ. Multigene phylogenetic and population differentiation data confirm the existence of a cryptic species within Chrysoporthe cubensis. Fungal Biol 2010; 114:966-79. [PMID: 21036341 DOI: 10.1016/j.funbio.2010.09.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 09/05/2010] [Accepted: 09/15/2010] [Indexed: 11/29/2022]
Abstract
Chrysoporthe cubensis is one of the most important pathogens of Eucalyptus. Based on phylogenetic evidence and geographic origin, isolates of this fungus are known to reside in distinct 'South America' and 'Southeast Asia' clades. In this study, reproductive isolation amongst these isolates of C. cubensis was tested using gene flow statistics for 12 polymorphic loci, and to support these data, phylogenetic affiliations based on gene trees and a multigene phylogeny were used. Gene flow statistics between populations, and relative to the closely related Chrysoporthe austroafricana, were low and not significantly different (P<0.05). Additionally, phylogenetic analyses of DNA sequence data for four gene regions convincingly distinguished the two subclades of C. cubensis. Isolates in the Southeast Asian subclade are described in the new species, Chrysoporthe deuterocubensis. Chrysoporthe cubensis and C. deuterocubensis represent closely related fungi that are thought to be native to South America and Southeast Asia, respectively. A technique is presented that allows for rapid differentiation between these species and that will aid in quarantine procedures to limit their spread to new environments.
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