Deciphering the origination, divergence and domestication of tetraploid cotton based on high-depth resequencing natural population

The sequencing revolution offers an excellent opportunity for unraveling the genetic history of crop domestication through large-scale resequencing. Cotton is a crucial cash crop which produce renewable fiber. Genome... [ view full abstract ]

The sequencing revolution offers an excellent opportunity for unraveling the genetic history of crop domestication through large-scale resequencing. Cotton is a crucial cash crop which produce renewable fiber. Genome resequencing of natural population will decode the genetic secret of cotton origination, diversity, domestication and improvement progress, and assist cotton breeders efforts to improve the fiber quality, disease resistance, and yield of modern cotton varieties. To address this goal, wide spread accessions were chosen to resequencing with high coverage, included wild, federal and cultivar tetraploid and diploid cotton. Through pervasive analysis, a comprehensive variation map for more than 1,000 cotton accessions were constructed, included SNPs, InDels, SVs et al. Domestication sweeps were identified through the genetic diversity analysis. The subgenome evolution and selection was also full-scale compared. This study provides comprehensive insights into the origination, divergence and adaptation in a major crop, and should serve as a rich resource for genome-based cotton improvement.