论文信息: Evaluation on potential risk of the emerging Yr5 -Virulent races of Puccinia striiformis f. sp. tritici to 165 Chinese wheat cultivars. Gensheng Zhang, Wei Liu, Xiangrui Cheng, Lin Wang, Xiaxia Tian, Zhimin Du, Zhensheng Kang, and Jie Zhao*. Plant Disease, 2022, doi: https://doi.org/10.1094/PDIS-11-21-2622-RE.
论文摘要：In 2017, a new race (TSA-6) of the wheat stripe rust pathogen, Puccinia striiformis f. sp. tritici , virulent to resistance gene Yr5 were detected in China. However, whether Chinese wheat cultivars are resistant to the new races was unknown. In this study, two isolates (TSA-6 and TSA-9) with virulence to Yr5 were tested on other wheat Yr gene lines for their avirulence/virulence patterns and used, together with prevalent races CYR32 and CYR34 without the Yr5 virulence, to evaluate 165 major Chinese wheat cultivars for their reactions. e Isolates TSA-6 and TSA-9 had similar but different virulence spectra, and therefore should be considered as two different races. Their avirulent/virulence patterns were remarkably different from CYR34 . Of the 165 wheat cultivars, 21 had all-stage resistance (ASR) to TSA-6, 34 to TSA-9, and 20 to both races. Adult-plant resistance (APR) were detected in 35 cultivars to TSA-6 27 to TSA-9 but only 3 cultivars showed APR to both new races. Slow rusting resistance of 24 cultivars to TSA-6, and of 33 to TSA-9 were determined. Analysis of variance (ANOVA) of disease index (DI) indicated ta significant difference among cultivars, but not among the four races. Based on the molecular marker data, a low percentage of wheat cultivars carried Yr5 , Yr7 , Yr10 , Yr15 , Yr26 , and/or YrSP. As TSA-6 and TSA-9 can be a serious threat to wheat production in China, monitoring TSA-6 and TSA-9 and other races are c continually needed.