文献类型： 外文期刊

作者： Yu, DZ ¹ ; Yang, XJ ² ; Yang, LJ ² ; Jeger, MJ ² ; Brown, JKM ² ;

作者机构： 1.Hubei Acad Agr Sci, Inst Plant Protect, Wuchang 430064, Wuhan, Peoples R China

2.Hubei Acad Agr Sci, Inst Plant Protect, Wuchang 430064, Wuhan, Peoples R China; Univ Wageningen & Res Ctr, Dept Phytopathol, NL-6709 PD Wageningen, Netherlands; John Innes Inst, Norwich NR4 7UH, Norfolk, England

关键词： Triticum aestivum;Blumeria graminis f. sp tritici;AUDPC;disease index;partial resistance

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 2001 年 120 卷 4 期

页码：

收录情况： SCI

摘要： Field trials in two cropping seasons and two locations in central China were conducted on 60 Chinese autumn-sown wheat varieties to assess their partial resistance to powdery mildew. Mean levels of disease severity ranged from close to 0 to more than 90%. The method of inoculation and the location in which trials were conducted affected the relative performance of the varieties, but these effects were much smaller than the main effect of variety. The area under the disease progress curve was highly correlated with final disease severity, but both were poorly correlated with apparent infection rate. Disease severity was regressed against frequencies of virulence in the Blumeria graminis (syn. Erysiphe graminis) f. sp. tritici populations in the trial plots. A vertical distance (D) from the mean mildew severity to the fitted line was calculated for each variety and was used to quantify partial resistance. Five of the 60 varieties, 'Hx8541', 'E28547', 'Chuan1066', 'Zhe88pin6' and 'Lin5064', consistently expressed relatively low levels of disease despite high frequencies of virulence in the pathogen and had consistently high D-values. They may therefore have good levels of partial resistance.