生物
种质资源
单核苷酸多态性
数量性状位点
SNP公司
遗传学
全基因组关联研究
SNP阵列
条锈病
关联映射
植物抗病性
遗传标记
遗传关联
基因
基因型
农学
作者
Bin Cheng,Xu Gao,Ning Cao,Yanqing Ding,Yu Gao,Tianqing Chen,Zhihai Xin,Liyi Zhang
标识
DOI:10.1007/s13353-019-00533-8
摘要
Abstract Wheat stripe rust can cause considerable yield losses, and genetic resistance is the most effective approach for controlling the disease. To identify the genomic regions responsible for Puccinia striiformis f. sp. tritici ( Pst ) resistance in a set of winter wheat strains mainly from southwestern China, and to identify DNA markers in these regions, we carried out a genome-wide association study (GWAS) of 120 China winter wheat accessions using single nucleotide polymorphism (SNP) markers from 90K wheat SNP arrays. In total, 16 SNP loci were significantly associated with wheat stripe rust in field and greenhouse trials. Of these, three distinctive SNPs on chromosomes 1B, 4A, and 6A were identified at a site in Mianyang in 2014, where the most prevalent wheat stripe rust races since 2009 have been V26 (G22-9, G22-14). This suggests that the three SNP loci were linked to the new quantitative trait loci (QTL)/genes resistant to the V26 races. Germplasm with immunity to Pst is a good source of stripe rust resistance for breeding, and after further validation, SNPs closely linked to resistance QTLs/genes could be converted into user-friendly markers and facilitate marker-assisted selection to improve wheat stripe rust resistance.
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