摘要
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。
The pathogenicity of 36 isolates of Xanthomonas oryzae pv. oryzae (Xoo), which were collected from japonica rices in the Yunnan Plateau, was evaluated on 29 rice varieties including a set of 7 varieties to identify pathogenicity, ie. Haonuoyang, TN1, Kogyoku , Zhengzhuai, IR26, Nanjing 33 and Kinmaze, which may be considered as a set of differential varieties for Xoo races from Yunnan japonica rice. The efficiency of the 7 varieties was further confirmed. The results showed reversible and specific reactions between isolates and varieties. The isolates were classified into 9 pathotypes from pathotype I to Ⅸ according to their pathogenic reactions on the 7 rice varieties. The pathotype Ⅴ was the epidemic while pathogen Ⅶ was the most pathogenic. Most japonica varieties being grown in the Yunnan plateau were susceptible to Xoo. The rice lines IRBB21 (Xa-21), Zhachanglong (Xa-22t,Xa-24t)and IR1545-339 (xa-5), which were resistant to all the isolates tested, can be used as donors of resistant genes for bacterial blight in japonica rice breeding in the Yunnan Plateau.
出处
《中国农业科学》
CAS
CSCD
北大核心
2005年第6期1148-1155,共8页
Scientia Agricultura Sinica
基金
云南省自然科学基金重点项目(2000C0010Z)
农业部"948"项目全球水稻分子育种
国家"十五"科技攻关项目(2004BA525B02-07)