Chromosomal Rearrangements and Origin of the Multiple XX/XY₁Y₂ Sex Chromosome System in Harttia Species (Siluriformes: Loricariidae).

ABSTRACT: The Neotropical genus Harttia comprises species with extensive chromosomal remodeling and distinct sex chromosome systems (SCSs). So far, three different SCSs with male heterogamety have been characterized in the group. In some species, the presence of the XX/XY₁Y₂ SCS is associated with a decrease in diploid numbers and several chromosomal rearrangements, although a direct relation to sex chromosome differentiation has not been shown yet. Here, we aimed to investigate the differentiation processes that have led to the establishment of the rare XX/XY₁Y₂ SCS and track its evolutionary history among other Harttia species. For that, four whole chromosome painting probes derived from chromosome 1 of H. torrenticola (HTO-1), chrom

SUBMITTER: Deon GA 

PROVIDER: S-EPMC8977651 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature