SNP marker-based genetic mapping of rust resistance gene in the vegetable cowpea landrace ZN016

文献类型： 外文期刊

第一作者： Wu, Xinyi

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

作者机构：

关键词： Genetic mapping; Rust resistance; SNP marker; Vegetable cowpea

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

ISSN： 0250-5371

年卷期： 2018 年 41 卷 2 期

页码：

收录情况： SCI

摘要： Cowpea rust, caused by Uromyces vignae, is one of the most destructive foliar diseases in cowpea [V. unguiculata. (L.) Walp]. Deployment of rust-resistant cultivars is the most environment-friendly and effective way to curb this disease. For this purpose, a fundamental step is to map the rust resistance genes in elite germplasm lines. In the current study, one major and two minor QTLs conferring rust resistance were detected in a 119-line recombinant inbred line (RIL) population derived from a cross between the rust resistant line "ZN016" and a susceptible cultivar "Zhijiang 282", using the state-of-the-art cowpea iSelect Consortium Array. The major QTL, designated as Ruvl, was mapped to a 12.48 cM interval between the SNP markers 2_01772 and 2_03292 on LG09, which explained 34.8% of the phenotypic variation. The minor QTLs, designated as Ruv2 and Ruv3, were mapped to a 7.01 cM interval on LG7 and a 6.19 cM interval on LG8, which accounted for 13.4% and 11.9% of the phenotypic variation, respectively. This study demonstrates the usefulness of the Consortium SNP Array on complex trait mapping and solidifies the basis for marker-assisted breeding of new cowpea varieties with improved rust resistance.

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