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利用Ｂｒｏｗｄｅｒ和ｗｏｌｆｅ分别提出的毒力频率法比较了河北、山东、河南和陕西４省小麦叶锈菌群体毒性基因及其频率、分布和组合，为相应抗性基因及其组合的利用和布局提供依据。结果表明：Ｖ２ａ、Ｖ３ｃ等７个基因在４省的相对频率均在１４．７１％以下，属于稀少毒性基因；Ｖ２ｄ，Ｖ３ｃ等７个基因的频率均高于５０．９６％，属于优势毒性基因；Ｖ１１，Ｖ２０，Ｖ２７，和Ｖ３２的频率为１５．８７～４９．１５，属于中间类型；Ｖ１，Ｖ２ｂ等１１个毒性基因的频率在４省间则有较大的差异。各省应因地制宜地采用毒性基因频率较低的相应的抗性基因。在毒性基因组合方面，在６个优势毒性基因中，Ｖ３Ｒｇ，１０，１７，２３，２６和Ｖ３Ｂｇ１０，１４ａｂ，１７，２６在４省均为优势组合，频率均在９．６８％以上。
The virulence frequency methods proposed by Browder and Wolfe were used to compare the frequency, distribution and combination of virulence genes of Puccinia recondita in Hebei, Shandong, Henan and Shaanxi provinces, and to provide evidence for the utilization and distribution of the corresponding resistance genes and their combinations in accordance with. The results showed that the relative frequencies of seven genes V2a and V3c in all four provinces were below 14.71%, which belonged to rare virulence genes. The frequencies of seven genes V2d and V3c were higher than 50.96% ; V11, V20, V27, and V32 frequency of 15.87 ~ 49.15, belonging to the middle type; V1, V2b and other 11 virulence genes in the four provinces there is a greater difference. Provinces should adopt the appropriate resistance genes with lower frequency of virulence genes according to local conditions. Among the six virulence genes, V3Rg, 10,17,23,26 and V3Bg10,14ab and 17,26 were the dominant combinations in all the four provinces with the frequencies above 9.68%.