Cotton D genome assemblies built with long-read data unveil mechanisms of centromere evolution and stress tolerance divergence.

ABSTRACT:

Background

Many of genome features which could help unravel the often complex post-speciation evolution of closely related species are obscured because of their location in chromosomal regions difficult to accurately characterize using standard genome analysis methods, including centromeres and repeat regions.

Results

Here, we analyze the genome evolution and diversification of two recently diverged sister cotton species based on nanopore long-read sequence assemblies and Hi-C 3D genome data. Although D genomes are conserved in gene content, they have diversified in gene order, gene structure, gene family diversification, 3D chromatin structure, long-range regulation, and stress-related traits. Inversions predominate among D genome rearrangements. Our results support roles f

SUBMITTER: Yang Z 

PROVIDER: S-EPMC8176745 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature