玉米小斑病菌O小麦优势种群变化趋势和玉米品种的抗病性监测  

The Developing Tend of the Predominant Population of Bipolaris Maydis Race O and the Disease Resistance Monitoring of the Maize Cultivars

作　　者：刘爱国[1] 张成和[1] 

机构地区：[1]河北农科院植保所,保定071000

出　　处：《河北农业大学学报》1997年第4期35-38,共4页Journal of Hebei Agricultural University

基　　金：国家"九五"攻关课题

摘　　要：为监测玉米小斑病菌O小种优势种群的变化趋势，作者于1991～1995年连续5a用新分离出的O小种强菌株，对生产上的10个骨干玉米自交系进行了温室苗期接种鉴定和连续9a对玉米杂交种进行抗病性跟踪监测。试验结果发现，玉米小斑病菌O小种随着新的抗病玉米杂交种在生产上的大面积种植，新的优势强菌系不断产生，致使玉米对小斑病的抗性也不断“丧失”。During 1991 ~ 1995, seedlings of 10 main cultivated inbred lines were inoculated with the new strong isolates of Bipolaris maydis in the green house to identify and monitor the developing tend of the predominant population of the race O. Moreover, the disease resis-tance of the main maize cultivars to Bipolaris maydis was monitored in 9 years successively.The results pointed out that the Bipolaris maydis race O appeared continually new predomi-nant strong strains as the releasing of the new cultivars with higher resistance so that the re-sistance of maize to Bipolaris maydis lost gradually.

关 键 词：玉米 小斑病菌 小种 强菌系 抗性鉴定 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]