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1979～1983年从省内46个县、市各主要病区分离了将近200个稻白叶枯病菌株,根据它们在我国现行一套鉴别品种上的反应,可将其分为致病力强弱不同的四个菌系群。另外,我们利用国外已知功能抗性基因的鉴别品种,与我国鉴别品种一起进行比较试验,根据77个代表菌株在这些鉴别品种上的反应,将这些鉴别品种归为七个品种群,并将这些菌株相应地分为四个菌群。这一试验结果表示,我省稻白叶枯病菌的致病力可能与日本和菲律宾菌系的不同。基于上述试验,我们认为金刚30、窄叶青8号、农垦57、植科1号、南15、IR26和76C 凡7等品种,可作为我省稻白叶枯病菌系鉴定的一套试用鉴别品种。根据这套鉴别品种,可将我省稻白叶枯病菌区分为五个菌系群(0,Ⅰ、Ⅱ、Ⅲ和Ⅳ)和九个亚群,基中Ⅲ群和Ⅳ群菌株对水稻品种表现分化性侵染。
From 1979 to 1983, nearly 200 strains of rice bacterial leaf blight were isolated from the major wards of 46 counties and cities in the province. According to their reaction in a current set of identification varieties in China, they can be divided into strong pathogenicity Weak four different strains of bacteria. In addition, we used the differential varieties of known functional resistance genes in foreign countries to conduct comparative experiments with our identification varieties. According to the reaction of 77 representative strains on these identified cultivars, we classify these identification varieties into seven varieties, These strains are divided into four groups accordingly. The results of this experiment show that the pathogenicity of the rice leaf blight in our province may be different from those in Japan and the Philippines. Based on the above experiments, we consider that the cultivars such as Vajra 30, Narrow Yeqing 8, Nongken 57, Yike 1, Na 15, IR26 and 76C 7 can be identified as a set of trials for identification of the rice bacterial blight in our province Variety. According to this set of identification varieties, the rice bacterial blight in our province can be divided into five bacterial strains (0, Ⅰ, Ⅱ, Ⅲ and Ⅳ) and nine subgroups. Performance of differentiated infection.