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Gunn JC, Christensen BM, Bueno EM, Cohen ZP, Kissonergis AS, Chen YH. Agricultural insect pests as models for studying stress-induced evolutionary processes. Insect Mol Biol 2024. [PMID: 38655882 DOI: 10.1111/imb.12915] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/14/2024] [Indexed: 04/26/2024]
Abstract
Agricultural insect pests (AIPs) are widely successful in adapting to natural and anthropogenic stressors, repeatedly overcoming population bottlenecks and acquiring resistance to intensive management practices. Although they have been largely overlooked in evolutionary studies, AIPs are ideal systems for understanding rapid adaptation under novel environmental conditions. Researchers have identified several genomic mechanisms that likely contribute to adaptive stress responses, including positive selection on de novo mutations, polygenic selection on standing allelic variation and phenotypic plasticity (e.g., hormesis). However, new theory suggests that stress itself may induce epigenetic modifications, which may confer heritable physiological changes (i.e., stress-resistant phenotypes). In this perspective, we discuss how environmental stress from agricultural management generates the epigenetic and genetic modifications that are associated with rapid adaptation in AIPs. We summarise existing evidence for stress-induced evolutionary processes in the context of insecticide resistance. Ultimately, we propose that studying AIPs offers new opportunities and resources for advancing our knowledge of stress-induced evolution.
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Affiliation(s)
- Joe C Gunn
- Department of Plant and Soil Science, University of Vermont, Burlington, Vermont, USA
| | - Blair M Christensen
- Department of Plant and Soil Science, University of Vermont, Burlington, Vermont, USA
| | - Erika M Bueno
- Department of Plant and Soil Science, University of Vermont, Burlington, Vermont, USA
| | - Zachary P Cohen
- Insect Control and Cotton Disease Research, USDA ARS, College Station, Texas, USA
| | | | - Yolanda H Chen
- Department of Plant and Soil Science, University of Vermont, Burlington, Vermont, USA
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2
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Yang F, Liu N, Crossley MS, Wang P, Ma Z, Guo J, Zhang R. Cropland connectivity affects genetic divergence of Colorado potato beetle along an invasion front. Evol Appl 2021; 14:553-565. [PMID: 33664794 PMCID: PMC7896701 DOI: 10.1111/eva.13140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 03/20/2020] [Revised: 09/02/2020] [Accepted: 09/10/2020] [Indexed: 12/27/2022] Open
Abstract
The population genetic structure of invasive species can be strongly affected by environmental and landscape barriers to dispersal. Disentangling the relative contributions of these factors to genetic divergence among invading populations is a fundamental goal of landscape genetics with important implications for invasion management. Here, we relate patterns of genetic divergence in a global invasive agricultural pest, Colorado potato beetle (CPB; Leptinotarsa decemlineata), to environmental and landscape factors along an invasion front in Northwestern China. We first used microsatellite markers and spatial-temporal samples to assess broad patterns of genetic diversity as well as fine-scale changes in patterns of genetic divergence. We then distinguished the relative contributions of five factors to genetic divergence among front populations: geographic distance (isolation by distance), climate dissimilarity (isolation by environment), and least-cost distances (isolation by resistance) modeled with three factors: climate suitability, cropland cover, and road networks. Genetic diversity broadly decreased from West to East, with the exception being Eastern China. Low levels of genetic diversity and varying degrees of divergence were observed in Northwestern China, reflecting the potential effect of landscape heterogeneity. Least-cost distance across cropland cover was most positively correlated with genetic divergence, suggesting a role of croplands in facilitating gene flow. The contribution of climate to genetic divergence was secondary, whether modeled in terms of local adaptability or connectivity of the climatic landscape, suggesting that constraints to CPB gene flow imposed by a harsh climate may be ameliorated in agricultural landscapes. No evidence was found for an obvious effect of road networks on genetic divergence and population structuring. Our study provides an example of how agricultural landscape connectivity can facilitate the spread of invasive pests, even across a broad climatic gradient. More broadly, our findings can guide decisions about future land management for mitigating further spread.
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Affiliation(s)
- Fangyuan Yang
- Institute of EntomologyGuizhou UniversityGuiyangGuizhouChina
- Key Laboratory of Zoological Systematics and EvolutionInstitute of ZoologyChinese Academy of SciencesBeijingChina
| | - Ning Liu
- Key Laboratory of Zoological Systematics and EvolutionInstitute of ZoologyChinese Academy of SciencesBeijingChina
| | | | - Pengcheng Wang
- Key Laboratory of Zoological Systematics and EvolutionInstitute of ZoologyChinese Academy of SciencesBeijingChina
- College of Life ScienceUniversity of Chinese Academy of SciencesBeijingChina
| | - Zhuo Ma
- Key Laboratory of Zoological Systematics and EvolutionInstitute of ZoologyChinese Academy of SciencesBeijingChina
- College of Life ScienceUniversity of Chinese Academy of SciencesBeijingChina
| | - Jianjun Guo
- Institute of EntomologyGuizhou UniversityGuiyangGuizhouChina
| | - Runzhi Zhang
- Key Laboratory of Zoological Systematics and EvolutionInstitute of ZoologyChinese Academy of SciencesBeijingChina
- College of Life ScienceUniversity of Chinese Academy of SciencesBeijingChina
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Fu Z, Meier AR, Epstein B, Bergland AO, Castillo Carrillo CI, Cooper WR, Cruzado RK, Horton DR, Jensen AS, Kelley JL, Rashed A, Reitz SR, Rondon SI, Thinakaran J, Wenninger EJ, Wohleb CH, Crowder DW, Snyder WE. Host plants and Wolbachia shape the population genetics of sympatric herbivore populations. Evol Appl 2020; 13:2740-2753. [PMID: 33294020 PMCID: PMC7691456 DOI: 10.1111/eva.13079] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 07/17/2020] [Accepted: 07/21/2020] [Indexed: 01/06/2023] Open
Abstract
Changing climate and land-use practices have the potential to bring previously isolated populations of pest insects into new sympatry. This heightens the need to better understand how differing patterns of host-plant association, and unique endosymbionts, serve to promote genetic isolation or integration. We addressed these factors in populations of potato psyllid, Bactericera cockerelli (Šulc), a generalist herbivore that vectors a bacterial pathogen (Candidatus Liberibacter solanacearum, causal pathogen of zebra chip disease) of potato (Solanum tuberosum L.). Genome-wide SNP data revealed two major genetic clusters-psyllids collected from potato crops were genetically similar to psyllids found on a common weed, Lycium spp., but dissimilar from those found on another common non-crop host, Solanum dulcamara L. Most psyllids found on Lycium spp. and potato represented a single mitochondrial cytochrome oxidase I (COI) haplotype that has been suggested to not be native to the region, and whose arrival may have been concurrent with zebra chip disease first emerging. The putatively introduced COI haplotype usually co-occurred with endosymbiotic Wolbachia, while the putatively resident COI haplotype generally did not. Genetic intermediates between the two genetic populations of insects were rare, consistent with recent sympatry or reproductive isolation, although admixture patterns of apparent hybrids were consistent with introgression of genes from introduced into resident populations. Our results suggest that both host-plant associations and endosymbionts are shaping the population genetic structure of sympatric psyllid populations associated with different non-crop hosts. It is of future interest to explicitly examine vectorial capacity of the two populations and their potential hybrids, as population structure and hybridization might alter regional vector capacity and disease outbreaks.
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Affiliation(s)
- Zhen Fu
- Department of EntomologyWashington State UniversityPullmanWAUSA
- Present address:
Department of EntomologyTexas A&M UniversityCollege StationTXUSA
| | | | - Brendan Epstein
- Department of Plant and Microbial BiologyUniversity of MinnesotaSt. PaulMNUSA
| | | | - Carmen I. Castillo Carrillo
- Departamento de Protección VegetalEstación Experimental Santa CatalinaInstituto Nacional de Investigaciones Agropecuarias (INIAP)QuitoEcuador
| | | | - Regina K. Cruzado
- Department of Entomology, Plant Pathology, and NematologyUniversity of IdahoMoscowIDUSA
| | - David R. Horton
- Temperate Tree Fruit and Vegetable ResearchUSDA‐ARSWapatoWAUSA
| | | | - Joanna L. Kelley
- School of Biological SciencesWashington State UniversityPullmanWAUSA
| | - Arash Rashed
- Department of Entomology, Plant Pathology, and NematologyUniversity of IdahoMoscowIDUSA
| | - Stuart R. Reitz
- Malheur Experiment StationOregon State UniversityOntarioORUSA
| | - Silvia I. Rondon
- Department of Crop and Soil ScienceHermiston Agricultural Research and Extension CenterHermistonORUSA
| | | | - Erik J. Wenninger
- Department of Entomology, Plant Pathology, and NematologyKimberly Research and Extension CenterUniversity of IdahoKimberlyIDUSA
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Cohen ZP, Brevik K, Chen YH, Hawthorne DJ, Weibel BD, Schoville SD. Elevated rates of positive selection drive the evolution of pestiferousness in the Colorado potato beetle (Leptinotarsa decemlineata, Say). Mol Ecol 2020; 30:237-254. [PMID: 33095936 DOI: 10.1111/mec.15703] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 09/28/2020] [Accepted: 10/15/2020] [Indexed: 12/16/2022]
Abstract
Contextualizing evolutionary history and identifying genomic features of an insect that might contribute to its pest status is important in developing early detection and control tactics. In order to understand the evolution of pestiferousness, which we define as the accumulation of traits that contribute to an insect population's success in an agroecosystem, we tested the importance of known genomic properties associated with rapid adaptation in the Colorado potato beetle (CPB), Leptinotarsa decemlineata Say. Within the leaf beetle genus Leptinotarsa, only CPB, and a few populations therein, has risen to pest status on cultivated nightshades, Solanum. Using whole genomes from ten closely related Leptinotarsa species native to the United States, we reconstructed a high-quality species tree and used this phylogenetic framework to assess evolutionary patterns in four genomic features of rapid adaptation: standing genetic variation, gene family expansion and contraction, transposable element abundance and location, and positive selection at protein-coding genes. Throughout approximately 20 million years of history, Leptinotarsa species show little evidence of gene family turnover and transposable element variation. However, there is a clear pattern of CPB experiencing higher rates of positive selection on protein-coding genes. We determine that these rates are associated with greater standing genetic variation due to larger effective population size, which supports the theory that the demographic history contributes to rates of protein evolution. Furthermore, we identify a suite of coding genes under positive selection that are putatively associated with pestiferousness in the Colorado potato beetle lineage. They are involved in the biological processes of xenobiotic detoxification, chemosensation and hormone function.
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Affiliation(s)
- Zachary P Cohen
- Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA
| | - Kristian Brevik
- Department of Plant and Soil Sciences, University of Vermont, Burlington, VT, USA
| | - Yolanda H Chen
- Department of Plant and Soil Sciences, University of Vermont, Burlington, VT, USA
| | - David J Hawthorne
- Department of Entomology, University of Maryland, College Park, MD, USA
| | - Benjamin D Weibel
- Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA
| | - Sean D Schoville
- Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA
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Gutiérrez Illán J, Bloom EH, Wohleb CH, Wenninger EJ, Rondon SI, Jensen AS, Snyder WE, Crowder DW. Landscape structure and climate drive population dynamics of an insect vector within intensely managed agroecosystems. Ecol Appl 2020; 30:e02109. [PMID: 32108396 DOI: 10.1002/eap.2109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
Characterizing factors affecting insect pest populations across variable landscapes is a major challenge for agriculture. In natural ecosystems, insect populations are strongly mediated by landscape and climatic factors. However, it has proven difficult to evaluate if similar factors predict pest dynamics in agroecosystems because control tactics exert strong confounding effects. We addressed this by assessing whether species distribution models could effectively characterize dynamics of an insect pest in intensely managed agroecosystems. Our study used a regional multi-year data set to assess landscape and climatic drivers of potato psyllid (Bactericera cockerelli) populations, which are often subjected to calendar-based insecticide treatments because they transmit pathogens to crops. Despite this, we show that psyllid populations were strongly affected by landscape and climatic factors. Psyllids were more abundant in landscapes with high connectivity, low crop diversity, and large natural areas. Psyllid population dynamics were also mediated by climatic factors, particularly precipitation and humidity. Our results show that many of the same factors that drive insect population dynamics in natural ecosystems can have similar effects in an intensive agroecosystem. More broadly, our study shows that models incorporating landscape and climatic factors can describe pest populations in agroecosystems and may thus promote more sustainable pest management.
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Affiliation(s)
| | - Elias H Bloom
- Department of Entomology, Washington State University, Pullman, Washington, 99164, USA
| | - Carrie H Wohleb
- Washington State University Extension, Ephrata, Washington, 99823, USA
| | - Erik J Wenninger
- Department of Entomology, Plant Pathology, and Nematology, University of Idaho, Kimberly, Idaho, 83844, USA
| | - Silvia I Rondon
- Department of Crop and Soil Science, Oregon State University, Hermiston, Oregon, 97838, USA
| | - Andrew S Jensen
- Northwest Potato Research Consortium, Lakeview, Oregon, 97630, USA
| | - William E Snyder
- Department of Entomology, Washington State University, Pullman, Washington, 99164, USA
| | - David W Crowder
- Department of Entomology, Washington State University, Pullman, Washington, 99164, USA
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González‐Serna MJ, Cordero PJ, Ortego J. Insights into the neutral and adaptive processes shaping the spatial distribution of genomic variation in the economically important Moroccan locust ( Dociostaurus maroccanus). Ecol Evol 2020; 10:3991-4008. [PMID: 32489626 PMCID: PMC7244894 DOI: 10.1002/ece3.6165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 02/12/2020] [Accepted: 02/18/2020] [Indexed: 11/11/2022] Open
Abstract
Understanding the processes that shape neutral and adaptive genomic variation is a fundamental step to determine the demographic and evolutionary dynamics of pest species. Here, we use genomic data obtained via restriction site-associated DNA sequencing to investigate the genetic structure of Moroccan locust (Dociostaurus maroccanus) populations from the westernmost portion of the species distribution (Iberian Peninsula and Canary Islands), infer demographic trends, and determine the role of neutral versus selective processes in shaping spatial patterns of genomic variation in this pest species of great economic importance. Our analyses showed that Iberian populations are characterized by high gene flow, whereas the highly isolated Canarian populations have experienced strong genetic drift and loss of genetic diversity. Historical demographic reconstructions revealed that all populations have passed through a substantial genetic bottleneck around the last glacial maximum (~21 ka BP) followed by a sharp demographic expansion at the onset of the Holocene, indicating increased effective population sizes during warm periods as expected from the thermophilic nature of the species. Genome scans and environmental association analyses identified several loci putatively under selection, suggesting that local adaptation processes in certain populations might not be impeded by widespread gene flow. Finally, all analyses showed few differences between outbreak and nonoutbreak populations. Integrated pest management practices should consider high population connectivity and the potential importance of local adaptation processes on population persistence.
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Affiliation(s)
- María José González‐Serna
- Grupo de Investigación de la Biodiversidad Genética y CulturalInstituto de Investigación en Recursos Cinegéticos – IREC – (CSIC, UCLM, JCCM)Ciudad RealSpain
| | - Pedro J. Cordero
- Grupo de Investigación de la Biodiversidad Genética y CulturalInstituto de Investigación en Recursos Cinegéticos – IREC – (CSIC, UCLM, JCCM)Ciudad RealSpain
- Departamento de Ciencia y Tecnología Agroforestal y GenéticaEscuela Técnica Superior de Ingenieros Agrónomos (ETSIA)Universidad de Castilla‐La Mancha (UCLM)Ciudad RealSpain
| | - Joaquín Ortego
- Department of Integrative EcologyEstación Biológica de Doñana – EBD – (CSIC)SevilleSpain
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Crossley MS, Rondon SI, Schoville SD. Effects of contemporary agricultural land cover on Colorado potato beetle genetic differentiation in the Columbia Basin and Central Sands. Ecol Evol 2019; 9:9385-9394. [PMID: 31463029 PMCID: PMC6706216 DOI: 10.1002/ece3.5489] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 04/09/2019] [Revised: 06/09/2019] [Accepted: 07/06/2019] [Indexed: 01/05/2023] Open
Abstract
Landscape structure, which can be manipulated in agricultural landscapes through crop rotation and modification of field edge habitats, can have important effects on connectivity among local populations of insects. Though crop rotation is known to influence the abundance of Colorado potato beetle (CPB; Leptinotarsa decemlineata Say) in potato (Solanum tuberosum L.) fields each year, whether crop rotation and intervening edge habitat also affect genetic variation among populations is unknown. We investigated the role of landscape configuration and composition in shaping patterns of genetic variation in CPB populations in the Columbia Basin of Oregon and Washington, and the Central Sands of Wisconsin, USA. We compared landscape structure and its potential suitability for dispersal, tested for effects of specific land cover types on genetic differentiation among CPB populations, and examined the relationship between crop rotation distances and genetic diversity. We found higher genetic differentiation between populations separated by low potato land cover, and lower genetic diversity in populations occupying areas with greater crop rotation distances. Importantly, these relationships were only observed in the Columbia Basin, and no other land cover types influenced CPB genetic variation. The lack of signal in Wisconsin may arise as a consequence of greater effective population size and less pronounced genetic drift. Our results suggest that the degree to which host plant land cover connectivity affects CPB genetic variation depends on population size and that power to detect landscape effects on genetic differentiation might be reduced in agricultural insect pest systems.
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Affiliation(s)
| | - Silvia I. Rondon
- Department of Crop & Soil Sciences, Hermiston Agricultural Research and Extension CenterOregon State UniversityHermistonORUSA
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