Genomic architecture of parallel ecological divergence: Beyond a single environmental contrast.

ABSTRACT: The study of parallel ecological divergence provides important clues to the operation of natural selection. Parallel divergence often occurs in heterogeneous environments with different kinds of environmental gradients in different locations, but the genomic basis underlying this process is unknown. We investigated the genomics of rapid parallel adaptation in the marine snail Littorina saxatilis in response to two independent environmental axes (crab-predation versus wave-action and low-shore versus high-shore). Using pooled whole-genome resequencing, we show that sharing of genomic regions of high differentiation between environments is generally low but increases at smaller spatial scales. We identify different shared genomic regions of divergence for each environmental axis and s

SUBMITTER: Morales HE 

PROVIDER: S-EPMC6892616 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature