Orthopteran Neo-Sex Chromosomes Reveal Dynamics of Recombination Suppression and Evolution of Supergenes.

ABSTRACT: The early evolution of sex chromosomes has remained obscure for more than a century. The Vandiemenella viatica species group of morabine grasshoppers is highly suited for studying the early stages of sex chromosome divergence and degeneration of the Y chromosome. This stems from the fact that neo-XY sex chromosomes have independently evolved multiple times by X-autosome fusions with different autosomes. Here, we generated new chromosome-level assemblies for two chromosomal races representing karyotypes with and without neo-sex chromosomes (P24XY and P24X0), and sequence data of a third chromosomal race with a different neo-XY chromosome system (P25XY). Interestingly, these two neo-XY chromosomal races are formed by different X-autosome fusions (involving chr1 and chrB, respectively), and w

SUBMITTER: Jayaprasad S 

PROVIDER: S-EPMC11589690 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature