Extensive local adaptation within the chemosensory system following Drosophila melanogaster's global expansion.

ABSTRACT: How organisms adapt to new environments is of fundamental biological interest, but poorly understood at the genetic level. Chemosensory systems provide attractive models to address this problem, because they lie between external environmental signals and internal physiological responses. To investigate how selection has shaped the well-characterized chemosensory system of Drosophila melanogaster, we have analysed genome-wide data from five diverse populations. By couching population genomic analyses of chemosensory protein families within parallel analyses of other large families, we demonstrate that chemosensory proteins are not outliers for adaptive divergence between species. However, chemosensory families often display the strongest genome-wide signals of recent selection within D. mel

SUBMITTER: Arguello JR 

PROVIDER: S-EPMC4910016 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature