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- W1970784888 abstract "Abstract Disentangling the relative contributions of selective and neutral processes underlying phenotypic and genetic variation under natural, environmental conditions remains a central challenge in evolutionary ecology. However, much of the variation that could be informative in this area of research is likely to be cryptic in nature; thus, the identification of wild populations suitable for study may be problematic. We use a landscape genetics approach to identify such populations of three‐spined stickleback inhabiting the Saint Lawrence River estuary. We sampled 1865 adult fish over multiple years. Individuals were genotyped for nine microsatellite loci, and georeferenced multilocus data were used to infer population groupings, as well as locations of genetic discontinuities, under a Bayesian model framework ( geneland ). We modelled environmental data using nonparametric multiple regression to explain genetic differentiation as a function of spatio‐ecological effects. Additionally, we used genotype data to estimate dispersal and gene flow to parameterize a simple model predicting adaptive vs. plastic divergence between demes. We demonstrate a bipartite division of the genetic landscape into freshwater and maritime zones, independent of geographical distance. Moreover, we show that the greatest proportion of genetic variation (31.5%) is explained by environmental differences. However, the potential for either adaptive or plastic divergence between demes is highly dependent upon the strength of migration and selection. Consequently, we highlight the utility of landscape genetics as a tool for hypothesis generation and experimental design, to identify focal populations and putative selection gradients, in order to distinguish between phenotypic plasticity and local adaptation." @default.
- W1970784888 created "2016-06-24" @default.
- W1970784888 creator A5001654353 @default.
- W1970784888 creator A5001675482 @default.
- W1970784888 date "2008-08-22" @default.
- W1970784888 modified "2023-10-03" @default.
- W1970784888 title "Landscape genetic analyses reveal cryptic population structure and putative selection gradients in a large-scale estuarine environment" @default.
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- W1970784888 doi "https://doi.org/10.1111/j.1365-294x.2008.03884.x" @default.
- W1970784888 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18662229" @default.
- W1970784888 hasPublicationYear "2008" @default.
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