<i>Puccinia striiformis</i> f. sp. <i>tritici</i> Exhibited a Significant Change in Virulence and Race Frequency in Xinjiang, China.

On the other hand, the old prevalent races, such as CYR34 and Suwon11-1 , still maintained their presence, although the frequency of some old races showed a decreasing trend, and some were even wiped out.

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Vr10 , Vr13 , and Vr19 exhibited an increasing trend, with a frequency of ≥18%, while the maximum decline was observed in Vr1 , Vr3 , and Vr9 , with a frequency of ≤−25%.

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