小麦品种汶农14抗白粉病基因的染色体定位  

Chromosomal Localization of the Gene for Resistance to Powdery Mildew in the Wheat Cultivar Wennong 14

作　　者：宋伟[1,2] 孙会改[1,2] 孙艳玲[2] 赵紫慧[1,2] 王晓鸣[2] 武小菲[2] 李洪杰[2] 

机构地区：[1]河北科技师范学院生命科技学院,河北秦皇岛066604 [2]中国农业科学院作物科学研究所/农作物基因资源与基因改良国家重大科学工程,北京100081

出　　处：《作物学报》2014年第5期798-804,共7页Acta Agronomica Sinica

基　　金：国家现代农业产业体系建设专项(CARS-3-1);国家转基因生物新品种培育重大专项(2014ZX0800906B-003);中国农业科学院作物科学研究所基本科研业务费专项(2014JB02-001);中国农业科学院创新团队项目资助

摘　　要：汶农14是近年山东省和国家审定的一个半冬性小麦品种。采用来自不同地区的52个小麦白粉菌菌株对汶农14进行抗性鉴定,并利用分子标记定位了其抗白粉病基因。汶农14对43个菌株(82.7%)表现抗病反应型,对9个菌株表现感病反应型。这些菌株对汶农14的毒力谱与已知抗白粉病基因Pm2相似,但汶农14对11个菌株的反应型与携带Pm2的Ulka/8*Cc不同。此外,利用26个菌株的鉴定结果表明,汶农14与携带Pm46的Tabasco相比,对3个菌株的反应型不同。汶农14在成株期对白粉菌混合菌株表现高抗反应型。利用汶农14×邯4564的F2和F2:3群体进行遗传分析,发现汶农14对E09菌株的抗性受1对显性基因控制,暂命名为PmW14。分子标记分析显示,PmW14与Xcfd8、Xcfd81和SCAR203连锁,遗传距离分别为7.5、1.8和7.7 cM。由于这些分子标记被定位于小麦5DS染色体的5DS-1-0-0.63区间,且与Pm2基因紧密连锁,因此推测,PmW14可能与Pm2位于相同的基因座。Wennong 14 is a facultative wheat cultivar commercialized in Shandong province and the neighbouring provinces in the northern part of Yellow and Huai River Valleys Facultative Wheat Zone in China. In this study, an array of Blumeria graminis f. sp. tritici （Bgt） isolates was used to test the resistance of Wennong 14 to powdery mildew at both seedling and adult stages. Among the 52 Bgt isolates tested at the seedling stage, Wennong 14 was resistant to 43 and susceptible to 9 isolates. The virulence pattern of these Bgt isolates on Wennong 14 was similar to that of the known powdery mildew resistance gene Pro2, but the reac- tions of Wennong 14 to 11 Bgt isolates differed from those of Ulka/8＊Cc carrying Pro2. Additionally, Wennong 14 was different from Tabasco carrying Pro46 in the reaction to three of 26 isolates examined. Wennong 14 was highly resistant to a mixture of Bgt isolates at the adult stage. Using the segregation populations of F2 and F2：3 developed from the cross of Wennong 14 ~ Han 4564, genetic analysis demonstrated that the resistance against Bgt isolate E09 in Wennong 14 was controlled by a single dominant gene, designated Pm W14. Based on the results of molecular analysis, Pm W14 was linked to markers XcfdS, Xcfd81, and SCAR203, with genetic distances of 7.5, 1.8, and 7.7 cM, respectively. These markers were previously localized on wheat chromosome 5DS in the region of 5DS-1-0-0.63 and linked to gene Pro2, therefore, ProW14 was most likely located on this locus and to be either the same as or an allele of Pro2.

关 键 词：小麦 白粉菌 抗病基因 PM2 分子标记 

分 类 号：S512.1[农业科学—作物学]