Adaptive alien genes are maintained amid a vanishing introgression footprint in a sea squirt.

ABSTRACT: Human transport of species across oceans disrupts natural dispersal barriers and facilitates hybridization between previously allopatric species. The recent introduction of the North Pacific sea squirt, Ciona robusta, into the native range of the North Atlantic sea squirt, Ciona intestinalis, is a good example of this outcome. Recent studies have revealed an adaptive introgression in a single chromosomal region from the introduced into the native species. Here, we monitored this adaptive introgression over time, examining both the frequency of adaptive alleles at the core and the hitchhiking footprint in the shoulders of the introgression island by studying a thousand Ciona spp. individuals collected in 22 ports of the contact zone, 14 of which were sampled 20 generati

SUBMITTER: Touchard F 

PROVIDER: S-EPMC11291672 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature