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Distribution,Frequency and Variation of Stripe Rust Resistance Loci Yr10,Lr34/Yr18 and Yr36 in Chinese Wheat Cultivars

查看全文 作　　者：Cuiling [1]Yuan;Hui [1]Jiang;Honggang [1]Wang;Kun [1]Li;Heng [1]Tang;Xianbin [1]Li;Daolin [1]Fu 高影响力作者 机构地区：[1]State Key Laboratory of Crop Biology,Shandong Key Laboratory of Crop Biology,Shandong Agricultural University,61 Daizong Street,Tai'an,Shandong 271018,China高影响力机构 出　　处：《Journal of Genetics and Genomics》索引2012年第39卷第11期,共6页高影响力期刊 基　　金：supported by the China Research and Development Initiative on Genetically Modified Plants(Grant No.2009ZX08009- 053B);the National Basic Research Program of China(973 Program,Grant No.2011CB 100700);the National Natural Science Foundation of China(Grant No.30871323) 摘　　要：Wheat stripe rust is a devastating disease in many regions of the world.In wheat,49 resistance genes for stripe rust have been officially documented,but only three genes are cloned,including the race-specific resistance Yr10 candidate gene(Yr10_(CG)) and slow-rusting genes Lr34/Yr18(hereafter designated as Yr18) and Yr36.In this study,we developed gene-specific markers for these genes and used them to screen a collection of 659 wheat accessions,including 485 Chinese cultivars.Thirteen percent and eleven percent of the tested Chinese cultivars were positive for the markers for Yr10_(CG) and Yr18_(RH)(the resistant haplotype of Yr18),respectively,but none were positive for the Yr36 marker.Since there is a limited use of the Yr10 gene in Chinese wheat,the relatively high frequency of wheat varieties with the Yr10_(CG) marker suggests that the identity of the Yr10 gene is unknown.With regards to the Yr18 gene,29%of the tested cultivars that are used in the Middle and Lower Yangtze Valleys' winter wheat zone were positive for Yr18_(RH) markers.A non-functional allele of Yr18_(RH) was identified in 'Mingxian 169',a commonly used susceptible check for studying stripe rust.The data presented here will provide useful information for marker-assisted selection for wheat stripe rust resistance. 关 键 词：小麦品种 中国品种 分子标记辅助选择 抗条锈性 频率 小麦条锈病 抗性基因 变异
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