【摘要】 利用采自云南高原粳稻区病叶分离的 17份水稻白叶枯病菌株 ,在 30份水稻品种上接种进行致病型初步鉴定。研究表明可以将 17个菌株分为 7个致病型 (Ⅰ～Ⅶ ) ,其中Ⅴ型菌为云南高原粳稻区的优势菌群。初步构建了一套包含 7个品种 (黄玉、毫糯扬、TN1、珍珠矮、IR2 6、南粳 33、金南风 )的高原粳稻白叶枯病菌的鉴别品种 ,明确了 7个致病型在这套鉴别品种上的反应型。早生爱国 3号 (Xa 3)、IR15 45 339(xa 5 )、IRBB2 1(Xa 2 1)、扎昌龙 (Xa 2 2 t,Xa 2 4t)对所接种菌均表现抗病 ,在云南高原粳稻育种中具有较好的利用前景。更多还原

【Abstract】 Seventeen isolates of Xanthomonas oryzae pv. oryzae collected from japonica rice grown in the Yunnan plateau region were preliminary classified into 7 pathotypes according to the pathogenic reactions on 30 rice varieties tested. The 7 pathotypes were named as pathotype Ⅰ to pathotype Ⅶ. The pathotype Ⅴ is an epidemic one in the Yunnan plateau rice region now. Seven rice varieties are considered as a set of differential varieties for bacterial blight race in the Yunnan plateau japonica rice, i.e. Kogyoku, Haonuoyang, TN1, Zhenzhu′ai, IR26, Nanjing 33 and Kinmaze . The disease reactions of the 7 pathotypes were determined on the set of differential varieties. The varieties Wase Aikoku 3 (Xa-3), IR1545-339(xa-5), IRBB21(Xa-21), and Zhachanglong (Xa-22 t, Xa-24 t) were resistant to all strains tested, and useful for resistance breeding in Yunnan Province.更多还原