Genomic data and multi-species demographic modelling uncover past hybridization between currently allopatric freshwater species.

ABSTRACT: Evidence for ancient interspecific gene flow through hybridization has been reported in many animal and plant taxa based on genetic markers. The study of genomic patterns of closely related species with allopatric distributions allows the assessment of the relative importance of vicariant isolating events and past gene flow. Here, we investigated the role of gene flow in the evolutionary history of four closely related freshwater fish species with currently allopatric distributions in western Iberian rivers-Squalius carolitertii, S. pyrenaicus, S. torgalensis and S. aradensis-using a population genomics dataset of 23,562 SNPs from 48 individuals, obtained through genotyping by sequencing (GBS). We uncovered a species tree with two well-differentiated clades: (i) S. carolitertii and S. pyre

SUBMITTER: Mendes SL 

PROVIDER: S-EPMC8478877 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature