Satellite DNAs and the evolution of the multiple X₁X₂Y sex chromosomes in the wolf fish Hoplias malabaricus (Teleostei; Characiformes).

ABSTRACT: Multiple sex chromosomes usually arise from chromosomal rearrangements which involve ancestral sex chromosomes. There is a fundamental condition to be met for their long-term fixation: the meiosis must function, leading to the stability of the emerged system, mainly concerning the segregation of the sex multivalent. Here, we sought to analyze the degree of differentiation and meiotic pairing properties in the selected fish multiple sex chromosome system present in the wolf-fish Hoplias malabaricus (HMA). This species complex encompasses seven known karyotype forms (karyomorphs) where the karyomorph C (HMA-C) exhibits a nascent XY sex chromosomes from which the multiple X₁X₂Y system evolved in karyomorph HMA-D via a Y-autosome fusion. We combined genomic and cytogeneti

SUBMITTER: Toma GA 

PROVIDER: S-EPMC11369246 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature