摘要： 1993～1994年，自河北省收集154个小麦白粉菌株，接种在15个已知抗白粉病基因小麦品种及近等基因系上。结果表明，V₁、V_3a、V_3b、V_3c、V₅、V₆、V₇、V₈、V₁₊₂₊₉毒性基因出现频率最高，均在96%以上；V₁₇出现频率次之，为51.9%;V₂、V_4a、V₂₊₆再次之，出现频率分别是25.3%、26.8%和9.1%;出现频率最低的是V_4b,仅3.9%.在毒性基因组合中，出现频率最高的是V₁+V_3a+V_3b+V_3c+V₅+V₆+V₇、V₈+V₁₊₂₊₉,达98.1%,其次是V₂+V₂₊₆、V₂+V_4a、V_4a+V₂₊₆、V_4a+V_4b、V₂+V_4b、V₂+V_4a+V_4b,出现频率分别为3.1%、2.5%、1.8%、1.8%、1.2%、1.2%,再次是V_4b+V₂₊₆、V₂+V_4a+V_4b、V₂+V_4a+V_4b+V₂₊₆,出现频率均为0.6%,这说明含有相应抗病基因的品种是高度抗病的，能将其相应的抗病基因重组在一起，对抗白粉病是有效的。

关键词: 小麦, 白粉菌, 毒性基因

Abstract: In 1994 and 1995,154 strains of Erysiphe graminis f. sp. tritici colected from Hebei Province were inoculated on 15 wheat cultivars and isolines with known powdery mildew resistance monogenes. The virulence gene frequencies of V₁、V_3a、V_3b、V_3c、V₅、V₆、V₇、V₈、V₁₊₂₊₉ appeared very high (more than 96%), followed byV₁₇(51.9%), the virulence gene frequencies ofV₂、V_4a、V₂₊₆were 25.3% and 20.8%, respectively, and those of V_4b were low (less than 3.9%).Virulence gene combinations frequencies ofV₁+V_3a+V_3b+V_3c+V₅+V₆+V₇、V₈+V₁₊₂₊₉,达98.1%,其次是V₂+V₂₊₆、V₂+V_4a、V_4a+V₂₊₆、V_4a+V_4b、V₂+V_4b、V₂+V_4a+V_4b appeared very high (90%-98%). The virulence gene combination frequencies ofV_4b+V₂₊₆、V₂+V_4a+V_4b、V₂+V_4a+V_4b+V₂₊₆ were low(less than 2.6%), it showed that cultivars with corresponding resistance gene combinations would be highly resistant.

Key words: Wheat, Frysiphe graminis, Virulence genes

中图分类号: 

• S435.121