Breeding cotton with superior fiber quality:identification and utilization of multiple elite loci and exotic genetic resources

In the last decade,cotton genomics had great progress in genome assembling(Li et al.,2015;Huang et al.,2020)and agriculturally important locus identification(Du et al.,2018;Ma et al.,2018;Li et al.,2021).Upland cotton(Gossypium hirsutum)is one of the most important cash crops cultivated worldwide.The fiber quality of cotton directly determines its economic value,and therefore enhancing fiber quality is always the primary task in cotton breeding practices(Xia et al.,2019;Huang et al.,2021).