云南稻瘟菌致病能力分析  

Pathogen icity Analysis ofM agnaporthe griseaIsolates from Yunnan

作　　者：陈于敏[1] 何月秋[1] 

机构地区：[1]云南农业大学教育部生物多样性与病虫害控制重点实验室

出　　处：《云南农业大学学报》2007年第1期41-44,共4页Journal of Yunnan Agricultural University

基　　金：国家"863"项目(2002AA245041);云南省科技厅配套项目(2003GP06);云南农科院植物新品种保护与测试项目。

摘　　要：33个主要来自云南的稻瘟菌株接种于43个品种上接种的结果表明，它们的致病频率在20．59％-83．72％之间，菌株的致病能力与生境来源存在一定关系。宜良菌株致病力最强，致病频率达81．40％，澄江、巍山的菌株次之，致病频率分别为64．29％，62．79％，其它来源的菌株致病频率较低。总体来看，滇东南菌株致病力强且致病类型多，滇中西部菌株致病力弱。The pathogenicity of 33 isolates of Magnaporthe grisea mainly from Yunnan Province was analyzed by inoculation onto 43 rice varieties. Their pathogenic frequencies （PF） varied greatly, from 20. 59% to 83.72%. Their pathogenicity is related to the origins at some extent. Virulence of the isolates from Yiliang County was the strongest with 81.40% PF, the middle from Chengjiang and Weishan Counties, with 64. 29% and 62. 79% PF, respectively, and weaker from other counties. The isolates from Southeastern Yunnan diversified in pathogenicity with strong virulence. The isolates, however, from the middle and western Yunnan have relatively weaker virulence.

关 键 词：稻瘟病 菌株 致病能力 

分 类 号：S435.111.41[农业科学—农业昆虫与害虫防治]