Ecological diversification of sea catfishes is accompanied by genome-wide signatures of positive selection.

ABSTRACT: Habitat transitions have shaped the evolutionary trajectory of many clades. Sea catfishes (Ariidae) have repeatedly undergone ecological transitions, including colonizing freshwaters from marine environments, leading to an adaptive radiation in Australia and New Guinea alongside non-radiating freshwater lineages elsewhere. Here, we generate and analyze one long-read reference genome and 66 short-read whole genome assemblies, in conjunction with genomic data for 54 additional species. We investigate how three major ecological transitions have shaped genomic variation among ariids over their ~ 50 million-year evolutionary history. Our results show that relatively younger freshwater lineages exhibit a higher incidence of positive selection than their more ancient marine counterparts. They als

SUBMITTER: Rincon-Sandoval M 

PROVIDER: S-EPMC11579386 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature