Genome and haplotype provide insights into the population differentiation and breeding improvement of Gossypium barbadense

• DOI: 10.1016/j.jare.2023.02.002
• Publication Date: 2023-02-10T18:09:13Z
• Authors: Nian Wang; Yuanxue Li; Qingying Meng; Meilin Chen; Mi Wu; Ruiting Zhang; Zhiyong Xu; Jie Sun; Xianlong Zhang; Xinhui Nie; Daojun Yuan; Zhongxu Lin
• Keywords: Gossypium barbadense; Gossypium

Sea-island cotton (Gossypium barbadense, Gb) is one of the major sources high-grade natural fiber. Besides common annual Gb cotton, perennial also cultivated, but studies on are rare.We aimed to make a systematic analysis sea-island and lay foundation for its utilization in breeding, try identify representative structural variations (SVs) reveal population differentiation adaptive improvement cotton.Through genome assembly accession (named Gb_M210936) comparative analysis, during domestication were identified by comparing Gb_M210936 with 3-79 wild allotetraploid G. darwinii. Six accessions combining resequenced 1,129 used conduct genetic analysis. Large haplotype blocks (haploblocks), generated from interspecific introgressions intraspecific inversions, analyze their effects agronomic traits cotton.One reference was assembled. Representative SVs identified, 31 found be associated traits. Perennial had closer kinship wild-to-landrace continuum south America where originally domesticated. Haploblocks promoted into three subgroups, suffered breeding selection, may drive adapted central Asian.Our study made up lack genome, clarified that exotic improved differentiation, drove Asia, which will provide new insights cottons.