我国主要麦区101个小麦生产和区试品种（系）及高代品系抗白粉基因推导

为了明确我国小麦品种（系）中抗白粉基因的组成，利用基因推导法对来自我国主要麦区的101个小麦品种（系）进行了抗白粉病基因推导。结果表明，近一半的供试生产品种对所有供试菌株表现感病；供试的大多数区试品种具有有效地抗白粉基因，应加快这些抗病品种的大面积推广；近1/3的高代品系含有有效地抗白粉基因。供试小麦生产品种和区试品种（系）及高代品系中具有已知的抗白粉基因主要有Pm4b、Pm8、Pm2 Mld、Pm4a、Pm2、Pm2 6、Pm30等。此结果对于我国小麦白粉病的抗病育种和品种布局有重要的参考价值。

Postulation of wheat powdery mildew resistance genes in 101 wheat cultivars (lines) from major wheat regions in China

Powdery mildew resistance genes in 101 wheat cultivars (lines) from major Chinese wheat regions were studied by using gene postulation. The results indicated that nearly half of the tested commercial wheat cultivars are susceptible to all twenty-one isolates of B. graminis f. sp. tritici. Most regional testing cultivars carry effective powdery mildew resistance genes; therefore, those cultivars should be extended. Nearly one third of the tested advanced lines have resistance genes that are effective to powdery mildew. Pm4b, Pm8, Pm2 Mld, Pm4a, Pm2, Pm2 6 and Pm30 were identified in the tested cultivars (lines). The information is useful for wheat powdery mildew resistance breeding and cultivars distribution.