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水稻白叶枯病菌〔Xanthomonas oryae(Uyeda et Ishiyama)Dowson〕存在致病力的差异。国内外的研究结果,有的认为病菌的不同的菌株其变异型是连续性的,为数量上的差异,有的则认为不同的菌株与水稻品种间的互作为垂直性的,存在质的差异。方中达等曾对我国各地280个白叶枯菌株进行致病性变异的测定,发现不同菌株的致病力强弱为连续性的差异,并初步区分为4个菌系群(Ⅰ—Ⅳ),1977—1978年我们以选用的鉴别品种测
Pathogenicity difference of Xanthomonas oryae (Uyeda et Ishiyama) Dowson exists. Domestic and foreign research results, and some think that different strains of bacteria variants are continuous, the number of differences, while others think that different strains and rice varieties of interaction between the vertical, there is a qualitative difference . Fang Zhongda et al. Had determined the pathogenicity variation of 280 strains of B.cerevisia in different parts of China and found that the virulence of different strains was the continuity difference, and was initially divided into four strains (Ⅰ-Ⅳ ), 1977-1978 we use the selection of varieties tested