Identification of SSR markers linked to the abscission of cotton boll traits and mining germplasm in Cotton  

作　　者：SHUI Guangling LIN Hairong MA Xiaomei ZHU Bo HAN Peng AINI Nurimanguli GUO Chunping WU Yuanlong PAN Zhenyuan YOU Chunyuan SONG Guoli NIE Xinhui 

机构地区：[1]Key Laboratory of Oasis Ecology Agricultural of Xinjiang Bingtuan,Agricultural College,Shihezi University,Shihezi,Xinjiang 832003,China [2]Cotton Institute,Xinjiang Academy of Agriculture and Reclamation Science,Shihezi,Xinjiang 832000,China [3]Agricultural Science Research Institute of the 5th Division of Xinjiang Production and Construction Corps,Shuanghe,Xinjiang 833408,China [4]Modern Agricultural College,Kashi University,Kashi,Xinjiang 844000,China [5]National Key Laboratory of Crop Genetic Improvement,College of Plant Sciences&Technology,Huazhong Agricultural University,Wuhan,Hubei 430070,China [6]National Key Laboratory of Cotton Bio‑Breeding and Integrated Utilization,Institute of Cotton Research,Chinese Academy of Agricultural Sciences,Anyang,Henan 455000,China

出　　处：《Journal of Cotton Research》2024年第2期177-187,共11页棉花研究（英文）

基　　金：Key Laboratory of Cotton Biology Open Fund(CB2022A11);National Natural Science Foundation of China(32260510);Innovation talent Program in Sciences and Technologies of Xinjiang Production and Construction Corps,China(2021CB028);Key Programs for Science and Technology Development of Shihezi city,Xinjiang Production and Construction Crops,China(2022NY01);Science and Technology Planning of Shuanghe city,Xinjiang Production and Construction Crops,China(2021NY02);key programs for science and technology development in agricultural field of Xinjiang Production and Construction Corps,China.

摘　　要：Background Cotton is an economically important crop.It is crucial to find an effective method to improve cotton yield,and one approach is to decrease the abscission of cotton bolls and buds.However,the lack of knowledge of the genetic and molecular mechanisms underlying cotton boll abscission traits has hindered genetic improvements.Results Pearson’s correlation analysis revealed a significant positive correlation between boll abscission rates 1(AR1)and boll abscission rates 2(AR2).A genome-wide association study was conducted on 145 loci that exhibited high polymorphism and were uniformly distributed across 26 chromosomes(pair).The study revealed 18,46,and 62 markers that were significantly associated with boll abscission,fiber quality,and yield traits(P<0.05),explaining 1.75%–7.13%,1.16%–9.58%,and 1.40%–5.44%of the phenotypic variation,respectively.Notably,the marker MON_SHIN-1584b was associated with the cotton boll abscission trait,whereas MON_CGR5732a was associated with cotton boll abscission and fiber quality traits.Thirteen of the marker loci identified in this study had been previously reported.Based on phenotypic effects,six typical cultivars with elite alleles related to cotton boll abscission,fiber quality,and yield traits were identified.These cultivars hold great promise for widespread utilization in breeding programs.Conclusions These results lay the foundation for understanding the molecular regulatory mechanism of cotton boll abscission and provide data for the future improvement of cotton breeding.

关 键 词：SSR Genome wide association studies ABSCISSION Favorable alleles COTTON Genetic improvement 

分 类 号：S562[农业科学—作物学]