12个小麦品种(系)白粉病抗性的遗传分析  

Inheritance of Resistance to Powdery Mildew in 12 Wheat Varieties(Lines)

作　　者：宋凤景[1] 肖明纲[1] 黄江[1,2,3] 王晓鸣[1] 朱振东[1] 武小菲[1] 李洪杰[1] 

机构地区：[1]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 [2]中国科学院遗传与发育生物学研究所农业资源研究中心农业水资源重点实验室,河北石家庄050021 [3]中国科学院研究生院,北京100049

出　　处：《作物学报》2012年第7期1339-1345,共7页Acta Agronomica Sinica

基　　金：中央级公益性科研院所基本科研业务费专项(20105);国家现代农业产业技术体系建设项目(CARS-3-1);国家转基因生物新品种培育重大专项(2009ZX08002-006B)的资助

摘　　要：利用17个不同来源和毒力的白粉菌菌株对12个小麦品种(系)进行抗性鉴定和抗病性遗传分析,同时利用Pm2和Pm8基因的特异分子标记检测了相应基因。供试的12个品种至少能够抗11个白粉菌菌株。用E09、E20和Bg2菌株接种F2群体,抗感植株分离比例和适合性测验证明这12个品种对不同白粉菌菌株的抗性均受1对显性基因控制。抗谱分析和基因紧密连锁分子标记(Xcfd81)分析表明良星66很可能含有Pm2或其等位基因。ω-黑麦碱基因(1RS染色体)和Glu-B1基因(1BS染色体)特异分子标记分析结果证明,山农20和郑麦9962含有T1BL.1RS易位染色体,即可能携带Pm8基因。由于Pm8基因对大多数菌株表现感病,所以这2个品种除Pm8外,还具有其他抗病基因。偃展4110与天民668对参试菌株的反应型表现一致,其他材料对不同菌株的反应型表现不同。Wheat powdery mildew, caused by the biotrophic parasitic fungus Blumeria graminis （DC.） f. sp. tritici E.O. Speer. is one of the most epidemic diseases in many wheat （Triticum aestivum L.） producing regions in China and other parts of the world. The information on inheritance of resistance to powdery mildew in commercial wheat cultivars is important for controlling the disease and developing new resistant cultivars. In the present study, 17 isolates of B. graminis were used to analyze test seedling reactions to powdery mildew in 12 wheat varieties （lines）. Molecular detection was performed to detect the presence of Pro2 and Pro8 for powdery mildew resistance. All of the 12 wheat cultivars were resistant to at least 11 isolates tested. Isolates E09, E20, and Bg2 were used to test the F2 populations for analyzing the inheritance of powdery mildew resistance in these wheat varieties （lines）. The reactions to different isolates of B. graminis and analysis of amplification with Pm2-1inked marker Xcfd81showed that Pro2 or its allele was most likely present in Liangxing 66. Using m-secalin gene- and Glu-B1 gene-specific markers on chromo- some arms 1RS and 1BS, respectively, the presence of T1BL-1RS translocation chromosome carrying Pm8 was detected in Shan- nong 20 and Zhengmai 9962. Since Pro8 was not effective against most isolates tested in this study, other unknown genes for powdery mildew resistance could be present in Shannong 20 and Zhengmai 9962 in addition to Pm8. The reaction patterns of Yanzhan 4110 and Tianmin 668 were identical. The remaining cultivars developed different patterns of reaction to the B. graminis isolates tested.

关 键 词：小麦 白粉病 抗病基因 遗传分析 

分 类 号：S512.1[农业科学—作物学]