东北春玉米区玉米栽培品种对大斑病抗性水平研究

通过人工接种,利用分离纯化的玉米大斑病强毒力菌株和混合菌株对2008～2009年从东北地区收集的269份玉米品种进行温室和大田玉米大斑病抗性水平鉴定。结果表明,温室鉴定条件下这些栽培品种对玉米大斑病抗性水平较低,田间人工接种和自然发病处理整体表现抗玉米大斑病水平较高。田间人工接种处理高感病品种(HS)占0.37%,感病(S)品种占4.83%,中抗(MR)品种占31.60%,抗病(R)品种占55.02%,高抗(HR)品种占7.80%;温室人工接种处理高感品种占64.31%,感病品种占21.56%,中抗品种占10.40%,抗病品种仅占3.72%;田间自然发病处理高感病品种为0,感病品种占1.11%,中抗品种占10.40%,抗病品种占22.68%,高抗品种占65.80%。

Resistance Level of Maize Cultivars to Northern Maize Leaf Blight in Northeast of China

Two hundred and sixty-nine maize cultivars were inoculated with virulent strains of Exserohilum turcicum or mixed culture to evaluate the resistance to northern maize leaf blight(NCLB) in the greenhouse or field conditions,which were collected in Northeast of China from 2008 to 2009.The result showed that the resistance of the maize cultivars to NCLB is low in the greenhouse but is comparatively high level in the field.The artificial inoculation treatment in the field conditions: highly susceptible cultivars count for 0.37%,susceptible cultivars count for 4.83%,mid-resistance count for 31.60%,resistance count for 55.02% and high resistance count for 7.80%.The artificial inoculation treatment in the greenhouse conditions: high susceptible cultivars count for 64.31 %,susceptible cultivars count for 21.56%,mid-resistance count for 10.40% and resistance only count for 3.72%.The field of the natural process: there are no highly susceptible cultivars,susceptible cultivars count for 1.11%,mid-resistance count for 10.40%,resistance count for 22.68% and high resistance count for 65.80%.