Population genomics of parallel evolution in gene expression and gene sequence during ecological adaptation.

ABSTRACT: Natural selection often produces parallel phenotypic changes in response to a similar adaptive challenge. However, the extent to which parallel gene expression differences and genomic divergence underlie parallel phenotypic traits and whether they are decoupled or not remains largely unexplored. We performed a population genomic study of parallel ecological adaptation among replicate ecotype pairs of the rough periwinkle (Littorina saxatilis) at a regional geographical scale (NW Spain). We show that genomic changes underlying parallel phenotypic divergence followed a complex pattern of both repeatable differences and of differences unique to specific ecotype pairs, in which parallel changes in expression or sequence are restricted to a limited set of genes. Yet, the majority of divergent g

SUBMITTER: Rivas MJ 

PROVIDER: S-EPMC6212547 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature