Population genetic structure in a self-compatible hermaphroditic snail is driven by drift independently of its contemporary mating system
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Journal Article
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Published
Recommended form of citation (APA)
Çetin, C., Jokela, J., Feulner, P. G. D., Schlegel, T., Tardent, N., & Seppälä, O. (2024). Population genetic structure in a self-compatible hermaphroditic snail is driven by drift independently of its contemporary mating system. Ecology and Evolution, 14, e70162. https://doi.org/10.1002/ece3.70162
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CC BY 4.0 (International)
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Gold OA
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Mathematische, Naturwissenschaftliche und Technische Bildung
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Fields of Science and Technology (OECD)
Natural sciences
Abstract
Genetic drift, gene flow, and natural selection commonly influence population geneticdiversity. In populations of self-compatible hermaphrodites, the mating system (e.g.,self-fertilization) further reduces individual heterozygosity. Furthermore, selfing, as aform of inbreeding, significantly impacts genetic drift by reducing effective popula-tion size (Ne). This can potentially accelerate genetic drift, particularly in small popula-tions where self-fertilization is likely during founder events. To investigate the rolesof genetic drift and contemporary mating system in populations of the freshwatersnail Lymnaea stagnalis, we examined their effective population sizes (Ne) and Tajima'sD values, which reflect genetic drift over extended time periods, as well as estimatesof within-population selfing rates and pairwise relatedness reflecting contemporarymating system. We used 4054 SNP markers obtained using restriction site associatedDNA (RAD) sequencing from individuals in five snail populations originating from geo-graphically closely located ponds. We found strong population genetic structure anddifferences in genetic diversity among populations. Covariation between genetic di-versity and Ne estimates and Tajima's D values suggested drift being an important de-terminant of genetic diversity and structure in these populations. However, this effectwas independent of the contemporary mating system, as indicated by the similarityof selfing rates and relatedness estimates among populations. Thus, founder events(possibly including historical inbreeding) and/or drift due to small sizes of L. stagnalispopulations are likely to explain their genetic structure and limit within-populationgenetic diversity.
Additional Information
Publikation entstand im Rahmen des SNF-geförderten EAWAG-Projekt "Natural selection on immune defence: a genome-wide gene expression analysis" (https://data.snf.ch/grants/grant/169531)
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Published Version
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metadata only (bibliographisch)
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CC BY 4.0 (International)
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