东北春麦区小麦品种(系)抗白粉病鉴定及抗源筛选

An Appraisal on Resistance of Wheat Varieties (Lines) and Resouces to Powdery Mildew in Northeast Spring Wheat Region

1991～1995年在田间小麦成株地测定了1149份生产品种、后备品种（系）及高代材料和1244份国内外各类小麦资源对白粉病的抗性。筛选出427份材料达中抗以上抗性水平，占参试材料17．8％。鉴定发现：各类抗性材料很不平衡，生产主栽品种抗性极差，后备品种（系）抗性惭强。高代材料抗性更强．后者抗性比率均在61．7％～96．5％之间。说明在东北春麦区白粉病流行体系内品种抗性有增强的趋势．

In 1991 to 1995 POwdery mildew was detelrined in the 1149commercial and replacement wheat cultivals (lines) and 1244 wheat resources at home and aboard.TheSelected 427 materisls had over the level of middle asistance, 17.8% in total tested valieties. It was foundthat the resistance among varieties was very different, commercial varieties <replacenment varieties<mutltigeneration hybrids. The resistant rates of muLtigeneration hybrids t'et.e 61.7% ~ 96.5%, whichshot'ed tint the 1.esistance or x'.lleat vilieties tO po\V'dcly mildew in epidemic system of nolrtheastspring wheat region trended to increase.