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采用国际鉴别寄主和我国鉴别寄主对四川稻白叶枯病病原菌株的致病力进行了比较分析。根据其致病反应,归划为O—Ⅳ型,O型对所有鉴别寄主几乎都无致病力;Ⅰ型对感病品种全刚30(HS)等有致病力;Ⅱ型对特特普(MS)等有致病力;Ⅲ型对南粳15(MR)等有致病力;Ⅳ型对爪哇14(R)等有致病力;尚未发现对IR_(26)(HR)等有致病力的Ⅴ型及Ⅵ型。试验结果表明、四川水稻白叶枯病病原菌株的致病型Ⅱ、Ⅲ型为优势菌株。其分布,西昌亚热带常发病区以Ⅱ、Ⅲ型为主,川东深丘夏秋伏旱偶发病区以Ⅲ型为主,川南浅丘夏秋高温常发病区以Ⅱ、Ⅲ型为主,川西南浅丘偶发病区以Ⅲ型为主。试验用不同致病力的菌株对88个国内、外主要稻种进行抗病性测定,据其抗性反应为高抗、抗、感及高感四群。
The virulence of rice bacterial blight of Sichuan Province was compared by using the international identification host and the identification host in China. According to its pathogenic response, classified as O-Ⅳ type, O-type almost no virulence for all the identification of the host; Ⅰ type susceptible varieties of all Gang 30 (HS) and other virulence; type Ⅱ special (MS) and so on. Type III has pathogenicity to MRJ and so on. Type IV has virulence to Java 14 (R) and so on. It has not been found that IR 26, HR etc. Pathogenic Ⅴ and Ⅵ type. The results showed that the pathogenic types Ⅱ and Ⅲ of the bacterial strains of rice bacterial blight in Sichuan Province were dominant strains. The distribution of Xishuangbanna sub-tropical endemic areas to type Ⅱ, Ⅲ mainly in summer and autumn in eastern Sichuan volcanic drought prone area Ⅲ type dominated by high temperature in summer and autumn in southern Sichuan shallow mountain high incidence of type Ⅱ, Ⅲ, The incidence of type Ⅲ-based. Eighty-eight domestic and foreign major rice species were tested for their disease resistance with different virulence strains. According to their resistance, they were highly resistant, resistant, sensitive and highly susceptible.