IDENTIFICATION AND MAPPING OF A POWDERY MILDEW RESISTANCE GENE VU-PM1 IN THE CHINESE ASPARAGUS BEAN LANDRACE ZN016

文献类型： 外文期刊

第一作者： Wu, Xiaohua

作者： Wu, Xiaohua;Wang, Baogen;Lu, Zhongfu;Wu, Xinyi;Li, Guojing;Xu, Pei

作者机构：

关键词： Cowpea;Asparagus bean;Powdery mildew;Resistance gene;Vu-Pml

期刊名称：LEGUME RESEARCH （ 影响因子：0.589； 五年影响因子：0.648 ）

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收录情况： SCI

摘要： Powdery mildew (PM), caused by the fungus Erysiphe polygoni D.C, is one of the most common and serious diseases of cowpea (Vigna. unguiculata L. Walp.)/asparagus bean (Vigna. unguiculata ssp. sesquipedialis). Deployment of scab-resistant varieties isthe major strategy to curb this disease. ZN016, a Chinese asparagus bean landrace, is highly resistant to powdery mildew. To identify the resistance genes in ZN016, an F?8 recombinant inbred line (RIL) population derived from the cross between ZN016 anda susceptible cultivar Zhijiang282 was evaluated for PM resistance in the open field in 2008 and 2009. Phenotypic analysis indicated that ZN016 harbors a single PM resistance gene. Using a SNP and SSR based genetic map constructed with this population, the PM resistance gene was mapped to a locus on LG9 flanked by SSR markers CLM030S and CLM0260, with a genetic distance of 2.0 cM and 5.0 cM, respectively. To our knowledge, this is the first powdery mildew resistance gene reported in cowpea, which was temporarily designated as Vu-Pml. The identification of Vu-Pml opens a door for dissecting resistance mechanisms and applying marker-assisted selection for the development of cultivars with PM resistance in cowpea.

分类号： S52

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