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从云南高原粳稻区采集分离36份白叶枯病菌株,在包括初步选定的7个高原粳稻白叶枯病菌鉴别品种(毫糯扬、TN1、黄玉、珍珠矮、IR26、南粳33、金南风)在内的29个水稻品种上测定致病型,进一步明确了这7个鉴别品种的有效性。发现菌株与品种之间具有交叉互作反应,菌株与品种之间存在质的特异性互作关系;利用这套鉴别品种可将36个菌株划分为9个致病型,其中Ⅴ型菌为优势菌群,Ⅶ型菌为毒性菌群。云南高原粳稻区的主栽品种多数感病。稻种资源IRBB21(Xa-21)、扎昌龙(Xa-22t,Xa-24t)、IR1545-339(xa-5)对所有参试菌株均表现抗病,在云南高原粳稻育种中具有较好的利用价值。
Thirty-six isolates of Xanthomonas oryzae were collected from the japonica rice area of Yunnan Plateau. The isolates of seven isolates of Xanthomonas oryzae pv. South wind), including 29 rice varieties to determine the pathogenicity, to further clarify the effectiveness of these seven identification varieties. It was found that there was cross-reaction between strains and varieties, and there was a qualitative and specific interaction between the strains and cultivars. By using this identification variety, 36 strains could be divided into nine pathogenic types, of which type V bacteria was dominant Flora, â ... ¢ bacteria is toxic flora. Most cultivars of japonica rice in Yunnan Plateau are susceptible. The rice resources IRBB21 (Xa-21), Zahanglong (Xa-22t, Xa-24t) and IR1545-339 (Xa-5) showed resistance to all the tested strains and had good breeding in Yunnan plateau japonica rice The value of use.