摘要
水平抗性或持久抗性应对病原物小种无专化性或专化性极弱,水平抗性一般多表现为部分抗性或相对抗性,其品种间的差异,往往为量的差异,难于用定性的方法鉴别。根据以上两点,鉴定水平抗性需要用尽可能多的,不同毒性的小种分别接种,而且需要针对品种群体进行定量的鉴定。
Aiming at the screening of wheat cultivars with horizontal resistance to yellow rust(Puccinia striiforrmis),evaluation of varietal resistance was conducted in a series of regional trials involving some twenty locations over a period of 3 years(1979-1981).The locations of these trials had been specially chosen so that the racial compositions of the pathogen of different regions were Somewhat different from each other.After the original data of disease had been transformed into relative resistance indices,two statistical approaches,namely analyses of variance and genotypic stability analyses,were tentatively tried out to analyze the data transformed.Based on the results of these statistical analyses,integrating with the historical records and other experimental data relevant to the manifestation of yellow rust resistance of the cultivars tested,seventeen cultivars,including Pinyuan 50,Shan-shi-ma-cha etc.were tentatively sorted out as cultivarspossessing different horizontal resistance.Problems in the recent investigation and future works needed to develop a better screening method,which would be as simple,reliable and as clear-cut as possible,were also discussed.
作者
全国小麦条锈病水平抗性联合鉴定协作组
National Cooperated Research Group on Horizontal Resistance to Yellow Rust of Wheat
出处
《中国农业科学》
1983年第4期58-67,共10页
Scientia Agricultura Sinica
