Inter and Intraspecific Genomic Divergence in Drosophila montana Shows Evidence for Cold Adaptation.

ABSTRACT: The genomes of species that are ecological specialists will likely contain signatures of genomic adaptation to their niche. However, distinguishing genes related to ecological specialism from other sources of selection and more random changes is a challenge. Here, we describe the genome of Drosophila montana, which is the most extremely cold-adapted Drosophila species known. We use branch tests to identify genes showing accelerated divergence in contrasts between cold- and warm-adapted species and identify about 250 genes that show differences, possibly driven by a lower synonymous substitution rate in cold-adapted species. We also look for evidence of accelerated divergence between D. montana and D. virilis, a previously sequenced relative, but do not find strong evidence for divergent se

SUBMITTER: Parker DJ 

PROVIDER: S-EPMC6107330 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature