Pangenome analysis reveals yield- and fiber-related diversity and interspecific gene flow in Gossypium barbadense L.

ABSTRACT: Gossypium barbadense is renowned for its superior fiber quality, particularly its extra-long fibers, although its fiber yield is lower compared to G. hirsutum. Here, to further reveal fiber-related genomic variants of G. barbadense, we de novo assemble 12 genomes of G. barbadense that span the wild-to-domesticated continuum, and construct a graph-based pangenome by integrating these assemblies and 17 publicly available tetraploid cotton genome assemblies. We uncover the divergent evolutionary trajectories and subsequent exchanges between G. barbadense and G. hirsutum through investigation of structural variants (SVs). We perform the SV-based GWAS analysis in G. barbadense and identify four, three, and seven candidate SVs for fiber length, fiber strength, and lint percentage, respectively.

SUBMITTER: Meng Q 

PROVIDER: S-EPMC12122945 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature