Genomic time-series data show that gene flow maintains high genetic diversity despite substantial genetic drift in a butterfly species

Zachariah Gompert, Amy Springer, Megan Brady, Samridhi Chaturvedi & Lauren Lucas
Effective population size affects the efficacy of selection, rate of evolution by drift, and neutral diversity levels. When species are subdivided into multiple populations connected by gene flow, evolutionary processes can depend on global or local effective population sizes. Theory predicts that high levels of diversity might be maintained by gene flow, even very low levels of gene flow, consistent with species long-term effective population size, but tests of this idea are mostly lacking. Here,...
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