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１９９４～１９９７年间，利用２５个抗叶锈病小麦单基因系（或近等基因系），对来自山西省１０个地（市）３１个县（市）的３３４个小麦叶锈菌株进行了测试，分析了山西省小麦叶锈菌群体的毒性基因频率。结果表明，毒性基因Ｖ１９的出现频率较低（２６３７％），其对应的抗性基因Ｌｒ１９为目前山西省小麦叶锈菌的有效抗病基因。其次，毒性基因Ｖ１５，Ｖ２０，Ｖ２５的出现频率分别为７１５％，７６２５％，７８０８％，对应的抗性基因Ｌｒ１５，Ｌｒ２０，Ｌｒ２５具有一定的利用价值。除此以外，其余２１个毒性基因的出现频率均高于８１７４％，其对应的抗性基因为目前山西省小麦叶锈菌的无效基因，在小麦抗锈育种上没有重要利用价值。
From 1994 to 1997, 334 wheat leaf rust strains from 31 counties (cities) of 10 prefectures and cities in Shanxi Province were tested using 25 single leaf rust resistant wheat lines (or near isogenic lines) The frequency of virulence genes of wheat leaf rust in Shanxi Province was analyzed. The results showed that the frequency of virulence gene V19 was low (2637%), and its corresponding resistance gene Lr19 was an effective resistance gene to wheat leaf rust in Shanxi Province. Second, the frequencies of virulence genes V15, V20 and V25 were 715%, 7625% and 7808%, respectively. Corresponding resistance genes Lr15, Lr20 and Lr25 had some utilization value. In addition, the frequency of occurrence of the other 21 virulence genes was higher than 8174%. The corresponding resistance gene was the null gene of wheat leaf rust fungus in Shanxi Province and had no important value in rust-proof breeding of wheat.