The origin, evolution, and translocation of sex chromosomes in Silurus catfish mediated by transposons.

ABSTRACT:

Background

Sex chromosome (SC) evolution is a longstanding topic of focus in evolutionary biology. Teleosts often exhibit rapid turnover of SCs and sex-determining (SD) genes, alongside a diverse range of SC differentiation mechanisms.

Results

On the basis of new chromosome-scale assemblies of three Silurus species (S. microdorsalis, S. glanis, and S. lanzhouensis) and two outgroup species (Pterocryptis cochinchinensis and Kryptopterus bicirrhis), along with our previous assemblies of S. meridionalis and S. asotus, we traced the evolution of SC in the Silurus genus (Siluriformes), following the fate of the known SD gene amhr2y. Phylogenetic analysis showed that amhr2y occurred at least before the divergence of Pterocryptis, Kryptopterus, and Silurus and lost in P. cochinchin

SUBMITTER: Zheng S 

PROVIDER: S-EPMC11846232 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature