甘肃中部麦区小麦条锈病菌越夏调查及品种抗性变异监测结果初报  

A preliminary survey of over-summering stripe rust and the resistant variety of wheat cultivars in middle Gansu

作　　者：曹世勤[1] 金社林[1] 段霞瑜[2] 骆惠生[1] 刘太国[2] 陈万权[2] 李辉 蒲崇建 贾秋珍[1] 金明安[1] 张勃[1] 黄瑾[1] 

机构地区：[1]甘肃省农业科学院植物保护研究所,兰州730070 [2]植物病虫害生物学国家重点实验室中国农业科学院植物保护研究所,北京100193 [3]甘肃省植保植检站,兰州730000

出　　处：《植物保护》2011年第3期133-138,共6页Plant Protection

基　　金：国家公益性行业(农业)科研专项(200903035);"十一五"国家科技支撑计划项目(2006BAD08A05)

摘　　要：2007-2009年，对甘肃省中部麦区小麦条锈病越夏情况进行调查，结果发现：条锈病菌在定西、临夏等中部麦区海拔1 718~2 350 m地带自生麦苗上可顺利越夏，病田率和病叶率分别为63.0%~80.0%和1.05%~5.80%，其越夏菌源量比陇南更大，是当地秋苗发病的初侵染源；秋苗病情调查结果表明，中部麦区秋苗病田率和病叶率均高于同期陇南麦区；品种抗性监测结果发现，34个供试品种（系）在中部麦区和陇南麦区的抗条锈性表现基本一致，部分品种发病程度重于陇南麦区。表明甘肃省定西、临夏等中部麦区已成为陇南小麦条锈病越夏区的重要组成部分。文中还对中部麦区越夏菌源的影响、作用及品种抗性变异因素等进行了讨论。The oversummering of wheat stripe rust caused by Puccinia striiformis f. sp.  tritici in the middle region of Gansu Province was surveyed during 2007-2009. The results showed that the pathogen could oversummer on the volunteer seedlings at the altitude of 1 718-2 350 m in the middle region of Gansu, especially Dingxi and Linxia. The percentage of the diseased field and diseased leaves were 63.0%-80.0% and 1.05%-5.80%, respectively, more than that in South of Gansu. Oversummering urediniospores of P. striiformis f. sp.  tritici on the volunteer seedlings could spread in the autumnsown wheat in the local areas, and were the most important primary infection sources. The stripe rust severity on autumnsown seedlings in the middle regions was greater than that in southern Gansu, which was consistent with the results of oversummering surveys. Thirtyfour wheat cultivars or lines displayed similar resistance to stripe rust in both of the abovementioned regions in 2008 and 2009. It suggested that the middle regions of Gansu have become parts of the major oversummer areas. The probable impacts of oversummering pathogens in the wide winter wheat areas were discussed.

关 键 词：小麦条锈病 陇中麦区 越夏 品种抗性 

分 类 号：S435.121.42[农业科学—农业昆虫与害虫防治]