Neo-Sex Chromosome Evolution in Treehoppers Despite Long-Term X Chromosome Conservation.

ABSTRACT: Sex chromosomes follow distinct evolutionary trajectories compared to the rest of the genome. In many cases, sex chromosomes (X and Y or Z and W) significantly differentiate from one another resulting in heteromorphic sex chromosome systems. Such heteromorphic systems are thought to act as an evolutionary trap that prevents subsequent turnover of the sex chromosome system. For old, degenerated sex chromosome systems, chromosomal fusion with an autosome may be one way that sex chromosomes can "refresh" their sequence content. We investigated these dynamics using treehoppers (hemipteran insects of the family Membracidae), which ancestrally have XX/X0 sex chromosomes. We assembled the most complete reference assembly for treehoppers to date for Umbonia crassicornis and employed comparative ge

SUBMITTER: Palmer Droguett DH 

PROVIDER: S-EPMC11662286 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature