Stripe Rust Resistance in Roegneria kamoji (Poaceae: Triticeae) and its Genetic Analysis

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• 作者：Fu-Qiang Zhao ; Qi Li ; Guo-Yue Chen ; Jun Li ; Hou-Yang Kang ; Yi Wang ; Xing Fan ; Li-Na Sha ; Yong-Hong Zhou and Hai-Qin Zhang
• 刊名：Journal of Phytopathology
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：165
• 期：3
• 页码：157-161
• 全文大小：294K
• ISSN：1439-0434

文摘

The Roegneria kamoji accession ZY 1007 was resistant to the mixed predominant races of Puccinia striiformis f.sp. tritici (Pst) in China based on field tests at adult-plant stage. The seedling resistance evaluation of ZY 1007 showed that it was resistant to stripe rust physiological strains CYR29, CYR33 and PST-V26, which were the predominant races of Pst in China. The female parent R. kamoji cv. Gansi No.1 (susceptible to Pst) was crossed with ZY 1007 (resistant to Pst). Parents, F₁ and F₂ populations were tested in a field inoculated with the mixed urediniospores. ZY 1007 and all the observed 11 F₁ hybrid plants were resistant, while plants of Gansi No.1 were susceptible. Among the 221 F₂ plants, 168 plants were resistant and 53 were susceptible, and the segregation of resistant and susceptible plants fits 3R:1S ratio (χ² = 0.074, P > 0.75). It confirmed that the resistance of stripe rust in ZY 1007 was controlled by a single dominant gene and temporarily designated as YrK1007.