Neo-sex Chromosomes Track the Mitochondrial Phylogeny and Exhibit an Extensive Added Stratum of Recombination Suppression in Honeyeaters (Aves: Meliphagidae).

ABSTRACT: Mounting discoveries of avian neo-sex chromosomes are providing opportunities to understand the extent of variation in fundamental aspects of avian neo-sex chromosome evolution. We integrated cytogenetic data, long-read assemblies, and whole-genome resequencing to test phylogenetic hypotheses of recombination suppression and to elucidate the phylogenetic distribution of neo-sex chromosomes in honeyeaters (Aves: Meliphagidae). We find that neo-sex chromosomes in honeyeaters evolved through a fusion of the long arm of chromosome 5 and the pseudoautosomal region (PAR) of both ancestral Z and W sex chromosomes. Resequencing data from 11 species of honeyeaters and outgroups supports our cytogenetic evidence that these neo-sex chromosomes are derived within honeyeaters. Phylogenetic analyzes con

SUBMITTER: Orzechowski SCM 

PROVIDER: S-EPMC12666536 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature