A QTL with Major Effect on Reducing Stripe Rust Severity Detected From a Chinese Wheat Landrace
文献类型： 外文期刊
作者： Zhang, H. Y. 1 ; Wang, Z. 1 ; Ren, J. D. 1 ; Du, Z. Y. 2 ; Quan, W. 3 ; Zhang, Y. B. 1 ; Zhang, Z. J. 1 ;
作者机构： 1.China Agr Univ, Dept Plant Pathol, Beijing 100193, Peoples R China
2.Open Univ China, Beijing 100039, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Beijing Engn & Tech Res Ctr Hybrid Wheat, Beijing 100097, Peoples R China
期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）
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年卷期：
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收录情况： SCI
摘要： Stripe rust, a devastating disease of wheat worldwide, can be controlled by use of diverse wheat resistance resources. To find new quantitative trait loci (QTL) for resistance to stripe rust, Qing Shumai (a Chinese winter wheat landrace possessing slow rusting resistance) was crossed with the susceptible line Mingxian 169. The parents and 276 recombinant inbred lines (RILs) from the cross were evaluated in five environments involving two locations (Gansu and Shandong provinces, China) and four autumn-sown wheat seasons (2008 to 2012). Disease severities on Qing Shumai were lower than 25%, contrasting with approximately 90% on Mingxian 169. The RILs varied in rust intensity in a continuous andmonomodal distribution. A bulked segregant analysis approach using 2,344 simple sequence repeat (SSR) markers mapped a major QTL to the long arm of chromosome 6D (hereby designated as QYr.cau-6DL). An SSR marker (gpw5179, https://wheat.pw.usda.gov/GG2/index.shtml) was identified as being tightly linked with QYr.cau-6DL. Combination between Q￥r.cau-6DL and the stripe rust-resistance gene Yrl8 was examined using 160 F2:3 families of Qing Shumai x RL6058 (a near-isogenic line for Yrl8 in the genetic background of the spring wheat Thatcher). The combination elevated the resistance consistently across both winter and spring wheat backgrounds, acting synergistically without undesired epistasis.
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