Subgenome-aware analyses reveal the genomic consequences of ancient allopolyploid hybridizations throughout the cotton family
Abstract
Hybridization of divergent species can result in viable offspring if it is accompanied by genome doubling, allowing proper meiotic pairing and isolating the produced lineage from its parents. The parental genomes may coexist within the same nucleus for millions of years, but this has been challenging to show because of genomic rearrangements and loss or retention of genes. In this study, we use a approach to decipher the sequence of ancient genome duplications in the cotton family, using seven chromosome-level genomes of representative species from most of the nine subfamilies. Our results reveal that an allohexaploid clade (ranked as a subfamily) partially derives from a different allotetraploid clade and itself contributed genomes to a younger allodecaploid clade.
- Publication:
-
Proceedings of the National Academy of Science
- Pub Date:
- April 2024
- DOI:
- 10.1073/pnas.2313921121
- Bibcode:
- 2024PNAS..12113921S