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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。
From 2007 to 2009, the investigation of wheat stripe rust over the summer in the middle wheat area of Gansu Province was conducted. The results showed that Stripe rust could be successfully summerized in the wheat growing areas of the middle part of the central part of China from Dingzhai to Linxia, The rate of diseased and diseased leaves were 63.0% ~ 80.0% and 1.05% ~ 5.80%, respectively. The over-summer bacterial source was larger than Longnan, which was the primary source of infection of local autumn seedlings. The results showed that the resistance to stripe rust of 34 tested cultivars (lines) in the central wheat and Longnan were basically the same Consistent, the incidence of some varieties is heavier than Longnan wheat area. It shows that the central wheat area in Dingxi and Linxia, Gansu Province, has become an important part of the Yuexia area of wheat stripe rust in Longnan. The paper also discussed the influence of the summer wheat germplasm resources, the function and the variation resistance of the varieties in the central wheat area.