论文部分内容阅读
以水稻白叶枯病病原细菌(Xanthomonas campestris PU.Oryzas)的41个菌株,对9个水稻品种作抗病性鉴定。利用Tai氏所提供的分析方法,估测和分析各供试品种及病原菌株遗传型稳定性参数。试验结果表明:抗原品种与病原菌株之间存在很显著的互作。根据平均病级及抗病性稳定性程度,把水稻品种划分为8个类型,还根据致病力的强弱及致病性的稳定性的程度,把病原菌株划分为6个类群。本文对水稻白叶枯病抗病性鉴定中的“标准鉴别品种”应具备的条件提出初步意见。还从供试菌株中筛选出一套具有稳定致病力的鉴别菌株。
Resistance to nine rice cultivars was identified using 41 strains of Xanthomonas campestris PU. Oryzas. Using the analytical methods provided by Tai, the genetic stability parameters of the tested varieties and pathogenic strains were estimated and analyzed. The experimental results show that there is a significant interaction between the antigenic strains and the pathogenic strains. According to the average grade and the degree of disease resistance stability, the rice cultivars were divided into eight types. According to the degree of pathogenicity and the degree of pathogenic stability, the strains of pathogens were divided into six groups. In this paper, preliminary comments were put forward on the conditions that should be possessed by “standard differential varieties” in the identification of bacterial blight resistance. Also from the test strains screened out a set of strains with stable pathogenicity identification.