Genomic Landscape of Divergence in Ballan Wrasse (Labrus bergylta).

ABSTRACT: The architecture underpinning genomic divergence is still a largely uncharted territory and likely case-dependent. Here, we investigated genome-wide variation in Ballan wrasse, a northeastern Atlantic fish species that displays two sympatric colour morphs, spotty and plain, that have been suggested to represent subspecies. We produced a chromosome-level reference genome and thereafter investigated genomic divergence among 152 individuals including both morphs, from two localities in Spain and Norway each and one in France. Differences between morphs dominated in Spain in accordance with sympatric divergence, whereas in Norway allopatric differentiation was prominent and repeated genomic signals of local divergence were found. Chromosomes had large low-recombining areas shared across all po

SUBMITTER: Jansson E 

PROVIDER: S-EPMC12573741 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature