50个小麦生产及后备品种(系)的抗白粉病基因推导

摘要

Whcat powdery mildew resistance genes in 50 wheat cultivars or lines were postulated by inoculating 25 isolates of Blumeria graminis f.sp.tritici.The results indicated that 8 cultivars or lines were susceptible to all tested isolates of B.graminis f.sp.tritici.5 cultivars or lines carried Pm8,2 carried Pm4a,9 carried Pm2+-6,4 carried Pm2 and the other 22 cultivars or lines carried unknown resistance genes.These results can provide information for wheat resistance cultivar breeding and production use.%为明确我国小麦品种(系)中抗白粉病基因的组成,利用25个不同毒性的小麦白粉菌菌株对50个小麦生产及后备品种(系)进行抗白粉病基因推导,结果表明,参试的50个小麦品种(系)中有8个小麦品种(系)对供试的25个菌株全部感病,5个品种含有抗病基因Pm8,2个品种含有Pm4a,9个品种含有Pm2+6,4个品种含有Pm2,22个品种(系)可能含有供试基因之外的其他抗性基因或新基因.此研究结果可为小麦抗病育种以及品种利用提供依据.