A vertebrate adaptive radiation is assembled from an ancient and disjunct spatiotemporal landscape.

ABSTRACT: To investigate the origins and stages of vertebrate adaptive radiation, we reconstructed the spatial and temporal histories of adaptive alleles underlying major phenotypic axes of diversification from the genomes of 202 Caribbean pupfishes. On a single Bahamian island, ancient standing variation from disjunct geographic sources was reassembled into new combinations under strong directional selection for adaptation to the novel trophic niches of scale-eating and molluscivory. We found evidence for two longstanding hypotheses of adaptive radiation: hybrid swarm origins and temporal stages of adaptation. Using a combination of population genomics, transcriptomics, and genome-wide association mapping, we demonstrate that this microendemic adaptive radiation of novel trophic specialists on San

SUBMITTER: Richards EJ 

PROVIDER: S-EPMC8157919 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature