Adaptive Divergence of Meiotic Recombination Rate in Ecological Speciation.

ABSTRACT: Theories predict that directional selection during adaptation to a novel habitat results in elevated meiotic recombination rate. Yet the lack of population-level recombination rate data leaves this hypothesis untested in natural populations. Here, we examine the population-level recombination rate variation in two incipient ecological species, the microcrustacean Daphnia pulex (an ephemeral-pond species) and Daphnia pulicaria (a permanent-lake species). The divergence of D. pulicaria from D. pulex involved habitat shifts from pond to lake habitats as well as strong local adaptation due to directional selection. Using a novel single-sperm genotyping approach, we estimated the male-specific recombination rate of two linkage groups in multiple populations of each species in common garden expe

SUBMITTER: Neupane S 

PROVIDER: S-EPMC7594247 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature