Evidence for evolution of a new sex chromosome within the haploid-dominant Marchantiales plant lineage.

ABSTRACT: Sex chromosomes have evolved independently in numerous lineages across the Tree of Life, in both diploid-dominant species, including many animals and plants, and the less studied haploid-dominant plants and algae. Strict genetic sex determination ensures that individuals reproduce by outcrossing. However, species with separate sexes (termed dioecy in diploid plants, and dioicy in haploid plants) may sometimes evolve different sex systems, and become monoicous, with the ability to self-fertilize. Here, we studied dioicy-monoicy transitions in the ancient liverwort haploid-dominant plant lineage, using three telomere-to-telomere gapless chromosome-scale reference genome assemblies from the Ricciaceae group of Marchantiales. Ancestral liverworts are believed to have been dioicous, with U and

SUBMITTER: Fu Y 

PROVIDER: S-EPMC12131699 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature