Near-complete genome assembly of allotetraploid Erianthus rockii reveals unique chromosome evolution and lineage-divergence trajectories in the Saccharum complex.

ABSTRACT: The Saccharum complex is known for having one of the most intricate genomes among plants, primarily originating from autopolyploidization. Erianthus rockii (E. rockii), an allotetraploid species within the Saccharum complex, serves as a key phylogenetic reference for studying polyploidization in Saccharum. Here, we present the gap-closed genome of E. rockii and investigate the origin and evolution of the Saccharum complex. The Saccharum complex species are thought to have originated from chromosome fusion and polyploidization events that trace back to a diploid common ancestor, approximately 5.1 million years ago. Comparative genomics analyses reveal the driving forces behind the rapid mobility of centromeres, as well as the fates of multiple centromeres after chromosome fusion events. Dif

SUBMITTER: Wang B 

PROVIDER: S-EPMC12546461 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature