Yang Fang, Wang Yunjing, Ji Zhiying, Liu Jiahui, Zhang Mei, Peng Yunliang, Zhao Jie, Ji Hongli
MoA Key Laboratory for Integrated Management of Pest on Crops in Southwest China/Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.
College of Plant Protection, Northwest A&F University, Xianyang 712199, China.
Plants (Basel). 2024 Oct 17;13(20):2902. doi: 10.3390/plants13202902.
The virulence analysis of f. sp. (), the cause of wheat stripe rust, is essential for predicting and managing the disease epidemic in Southwest China, where the wheat cultivation has significantly reduced in the past few decades due to the impact of this disease. From 2020 to 2021, 196 isolates were collected from Guizhou, Yunnan, and Sichuan. The virulence and race assessments were conducted using Chinese differential genotypes. Additionally, the resistance expression of 102 wheat lines was evaluated in 2021 in two disease nurseries located in Ningnan and Jiangyou. All the 45 isolates from Guizhou and Yunnan belonged to pathogroup Hybrid 46, with 36 identified as race CYR32. Among the 69 isolates from the Liangshan Prefecture, 67 belonged to the Hybrid 46 group, while the remaining two were identified as race CYR34 in the G-22 group. Furthermore, all 79 isolates from the western Sichuan Basin belonged to the G-22 group, with 54 identified as race CYR34. The diversity indices of the populations from Guizhou, Sichuan, and Yunnan exhibited a sequential decline. Virulence variation among the populations from Yunnan, Guizhou, and the Ganzi-Liangshan region was minimal; however, significant virulence differences were observed when these populations were compared to those from the western Sichuan Basin. Results from disease nurseries indicated that virulence was notably stronger in Ningnan compared to that in Jiangyou. The Sichuan Basin exhibits a notable diversity in virulence, coupled with a more frequent genetic exchange occurring between the Liangshan Prefecture and the Yunnan-Guizhou Plateau. This information is essential for developing effective management strategies to mitigate the impact of wheat stripe rust in this region.
小麦条锈病菌（）的毒性分析对于预测和管理中国西南地区的病害流行至关重要，在该地区，由于这种病害的影响，过去几十年小麦种植面积大幅减少。2020年至2021年，从贵州、云南和四川收集了196个分离株。使用中国鉴别基因型进行毒性和小种评估。此外，2021年在位于宁南和江油的两个病害苗圃中评估了102个小麦品系的抗性表现。来自贵州和云南的所有45个分离株都属于杂交46致病型，其中36个被鉴定为小种CYR32。在来自凉山州的69个分离株中，67个属于杂交46组，其余两个在G - 22组中被鉴定为小种CYR34。此外，来自四川盆地西部的所有79个分离株都属于G - 22组，其中54个被鉴定为小种CYR34。贵州、四川和云南种群的多样性指数呈依次下降趋势。云南、贵州和甘孜 - 凉山地区种群之间的毒性变异最小；然而，当将这些种群与四川盆地西部的种群进行比较时，观察到显著的毒性差异。病害苗圃的结果表明，宁南的毒性明显强于江油。四川盆地在毒性方面表现出显著的多样性，同时凉山州与云贵高原之间发生更频繁的基因交流。这些信息对于制定有效的管理策略以减轻该地区小麦条锈病的影响至关重要。
