Signatures of selection in the three-spined stickleback along a small-scale brackish water - freshwater transition zone.

ABSTRACT: Local adaptation is often obvious when gene flow is impeded, such as observed at large spatial scales and across strong ecological contrasts. However, it becomes less certain at small scales such as between adjacent populations or across weak ecological contrasts, when gene flow is strong. While studies on genomic adaptation tend to focus on the former, less is known about the genomic targets of natural selection in the latter situation. In this study, we investigate genomic adaptation in populations of the three-spined stickleback Gasterosteus aculeatus L. across a small-scale ecological transition with salinities ranging from brackish to fresh. Adaptation to salinity has been repeatedly demonstrated in this species. A genome scan based on 87 microsatellite markers revealed only few signa

SUBMITTER: Konijnendijk N 

PROVIDER: S-EPMC4588664 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature