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논문 상세정보

Resequencing a core collection of upland cotton identifies genomic variation and loci influencing fiber quality and yield

Nature genetics v.50 no.6 , 2018년, pp.803 - 813  
Ma, Zhiying (North China Key Laboratory for Crop Germplasm Resources of Education Ministry, Hebei Agricultural University, Baoding, China. mzhy@hebau.edu.cn ) ;  He, Shoupu ( State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang, China ) ;  Wang, Xingfen ( North China Key Laboratory for Crop Germplasm Resources of Education Ministry, Hebei Agricultural University, Baoding, China. cotton@hebau.edu.cn ) ;  Sun, Junling ( State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang, China ) ;  Zhang, Yan ( North China Key Laboratory for Crop Germplasm Resources of Education Ministry, Hebei Agricultural University, Baoding, China ) ;  Zhang, Guiyin ( North China Key Laboratory for Crop Germplasm Resources of Education Ministry, Hebei Agricultural University, Baoding, China ) ;  Wu, Liqiang ( North China Key Laboratory for Crop Germplasm Resources of Education Ministry, Hebei Agricultural University, Baoding, China ) ;  Li, Zhikun ( North China Key Laboratory for Crop Germplasm Resources o) ;  Liu, Zhihao Sun, Gaofei Yan, Yuanyuan Jia, Yinhua Yang, Jun Pan, Zhaoe Gu, Qishen Li, Xueyuan Sun, Zhengwen Dai, Panhong Liu, Zhengwen Gong, Wenfang Wu, Jinhua Wang, Mi Liu, Hengwei Feng, Keyun Ke, Huifeng Wang, Junduo Lan, Hongyu Wang, Guoning Peng, Jun Wang, Nan Wang, Liru Pang, Baoyin Peng, Zhen Li, Ruiqiang Tian, Shilin Du, Xiongming
Abstract

Upland cotton is the most important natural-fiber crop. The genomic variation of diverse germplasms and alleles underpinning fiber quality and yield should be extensively explored. Here, we resequenced a core collection comprising 419 accessions with 6.55-fold coverage depth and identified approximately 3.66 million SNPs for evaluating the genomic variation. We performed phenotyping across 12 environments and conducted genome-wide association study of 13 fiber-related traits. 7,383 unique SNPs were significantly associated with these traits and were located within or near 4,820 genes; more associated loci were detected for fiber quality than fiber yield, and more fiber genes were detected in the D than the A subgenome. Several previously undescribed causal genes for days to flowering, fiber length, and fiber strength were identified. Phenotypic selection for these traits increased the frequency of elite alleles during domestication and breeding. These results provide targets for molecular selection and genetic manipulation in cotton improvement.

  

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