Association mapping and domestication analysis to dissect genetic improvement process of upland cotton yield-related traits in China

• 作者: GUO Chunping PAN Zhenyuan YOU Chunyuan ZHOU Xiaofeng HUANG Cong SHEN Chao ZHAO Ruihai YANG Qingyong ZHU Longfu SHAHZAD Raheel MENG Fande LIN Zhongxu NIE Xinhui
• 来源期刊: 棉花研究（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: RESEARCH
• 页码范围: 126-137
• 页数: 12页
• 语种: 英文

摘要

Background:Cotton fiber yield is a complex trait,which can be influenced by multiple agronomic traits.Unravelling the genetic basis of cotton fiber yield-related traits contributes to genetic improvement of cotton.Results:In this study,503 upland cotton varieties covering the four breeding stages (BS1-BS4,1911-2011) in China were used for association mapping and domestication analysis.One hundred and forty SSR markers significantly associated with ten fiber yield-related traits were identified,among which,29 markers showed an increasing trend contribution to cotton yield-related traits from BS1 to BS4,and 26 markers showed decreased trend effect.Four favorable alleles of 9 major loci (R2 ≥ 3) were strongly selected during the breeding stages,and the candidate genes of the four strongly selected alleles were predicated according to the gene function annotation and tissue expression data.Conclusions:The study not only uncovers the genetic basis of 10 cotton yield-related traits but also provides genetic evidence for cotton improvement during the cotton breeding process in China.