| The wheat varieties cultivated in 22 Sichuan areas approved by Sichuan Province from 2010 to 2017 were selected,and their resistance to stripe rust was identified and high-resistance varieties were screened. Then, the field identification test which naturally induced stripe rust was set up. The results of the identification of the resistance to stripe rust at the end of wheat growth period, including the response type, prevalence rate and disease index, showed a significant positive correlation. Systematic cluster analysis was performed on response type, universal rate and disease index. Cluster analysis concluded that 22 wheat varieties were divided into 3 categories, 6 varieties were high-resistance strip rust, 11 varieties were medium-resistance strip rust, and 7 varieties were medium-sensing stripe rust, among which high-resistance varieties were Ziyang 1. Guohao Mai 15, Mianmai 1501, Xikemai 7, Xikemai 10, and Chuanyu 24. The test results show that due to the emergence of CYR34, some newly cultivated wheat varieties quickly lose disease resistance. |
