Association between SSR markers and fibre traits in sea island cotton (Gossypium barbadense) germplasm resources
文献类型： 外文期刊
作者： Ma, Qi 1 ; Zhao, Jing 2 ; Lin, Hai 1 ; Ning, Xinzhu 1 ; Liu, Ping 1 ; Deng, Fujun 1 ; Si, Aijun 1 ; Li, Jilian 1 ;
作者机构： 1.Xinjiang Acad Agr & Reclamat Sci, Northwest Inland Reg Key Lab Cotton Biol & Genet, Cotton Res Inst, Shihezi 832000, Peoples R China
2.Xinjiang Acad Agr & Reclamat Sci, Crop Res Inst, Shihezi 832000, Peoples R China
关键词： germplasm resources; fibre traits; association analysis; simple sequence repeat marker; Gossypium barbadense
期刊名称：JOURNAL OF GENETICS （ 影响因子：1.166； 五年影响因子：1.212 ）
ISSN： 0022-1333
年卷期： 2017 年 96 卷
页码：
收录情况： SCI
摘要： Identification of molecular markers associated with fibre traits can accelerate cotton marker-assisted selection (MAS) programmes. In this study, Gossypium barbadense germplasm accessions with diverse origins (n = 123) were used to perform association analysis of fibre traits with 120 polymorphic simple sequence repeat (SSR) markers. In total, 120 polymorphic primer pairs amplified 258 loci with a mean of 2.15 loci per primer. Population structure analysis identified three main clusters for the accessions, which indicated agreement of genetic and predefined populations. Marker-trait associations (n = 58) were detected for 10 fibre traits with 26 SSR markers located on 15 chromosomes. The R-2 (phenotypic variation explained) ranged from 3.19 to 15.21%. Two markers (NAU5465 and NAU3013) were found to be stably associated with boll number per plant (BNP) and fibre uniformity (UI), respectively. Four markers (BNL252, NAU3424, NAU3324 and CGR5202) associated with fibre quality traits preferentially clustered on the D8 chromosome, which was thus identified as an important candidate region for study molecular mechanisms underlying fibre quality and for use in breeding cotton cultivars for improving fibre quality. This study generated molecular data with a potential for better understanding of the genetic basis of the fibre traits and provided new markers for MAS in G. barbadense breeding programmes.
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