我国主要麦区101个小麦品种（系）的抗白粉病基因推导

为了明确当前我国小麦品种（系）中抗白粉病基因的组成，利用基因推导法对来自我国主要麦区的１０１个小麦生产品种、区试品系和高代品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系具有有效的抗白粉病基因；近１／３的高代品系含有有效的抗白粉病基因。供试小麦生产品种和区试品系及高代品系中具有已知的抗白粉病基因主要有Ｐｍ４ｂ、Ｐｍ８、Ｐｍ２＋Ｍｌｄ、Ｐｍ４ａ、Ｐｍ２、Ｐｍ２＋６、Ｐｍ３０ 等。

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 21 isolates of B. graminis f. sp. tritici. Most regional testing cultivars carried effective powdery mildew resistance genes; therefore, those cultivars should be extended. Nearly one third of the tested advanced lines had resistance genes that here effective to powdery mildew. Pm4b, Pm8, Pm2+Mld, Pm4a, Pm2, Pm2+6 and Pm30 were identified in the tested cultivars (lines). These information were useful for wheat powdery mildew resistance breeding and cultivars distribution.