Complex population history affects admixture analyses in nine-spined sticklebacks.

ABSTRACT: Introgressive hybridization is an important process in evolution but challenging to identify, undermining the efforts to understand its role and significance. On the contrary, many analytical methods assume direct descent from a single common ancestor, and admixture among populations can violate their assumptions and lead to seriously biased results. A detailed analysis of 888 whole-genome sequences of nine-spined sticklebacks (Pungitius pungitius) revealed a complex pattern of population ancestry involving multiple waves of gene flow and introgression across northern Europe. The two recognized lineages were found to have drastically different histories, and their secondary contact zone was wider than anticipated, displaying a smooth gradient of foreign ancestry with some curious deviation

SUBMITTER: Feng X 

PROVIDER: S-EPMC9828525 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature