Admixture in a butterfly species complex creates a genomic mosaic of ancestry with distinct histories for different chromosomes.

ABSTRACT: Hybridization and admixture give rise to populations with mosaic genomes composed of ancestry segments with distinct origins and histories. Despite a growing number of documented cases of admixture in nature, relatively little is known about how mosaic patterns of ancestry vary simultaneously across the genome and among multiple populations or lineages of hybridizing species. Here, using pooled whole-genome sequence data from more than 20 populations representing three nominal species and multiple admixed or taxonomically ambiguous populations, we show that widespread admixture in Lycaeides butterflies has resulted in distinct evolutionary histories within and among chromosomes, with the most notable differences between the autosomes and the Z sex chromosome. Many populations exhibi

SUBMITTER: Gompert Z 

PROVIDER: S-EPMC12704007 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature