A Study on Virulence Genes of Wheat Erysiphe graminis f.sp.Tritici Population in Hebei Province

doi:10.3321/j.issn:1000-7091.1997.04.018

Abstract

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

CLC Number:

S435.121

Gao Shengguo. A Study on Virulence Genes of Wheat Erysiphe graminis f.sp.Tritici Population in Hebei Province[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1997, 12(4): 90-93. doi: 10.3321/j.issn:1000-7091.1997.04.018.

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