论文部分内容阅读
在我国农家品种中白粉病抗源很少，其中红蜷芒、蚂蚱麦和小白冬麦经多处鉴定，高抗白粉病。在南京条件下经多年鉴定，无论苗期或成株期均抗白粉病。先后用这３个农家种分别与感病品种及含有已知抗病基因的抗源进行杂交，对其杂种后代进行抗性遗传分析，结果证明这３个农家种各含有１对显性抗病基因，经测位杂交分析，其所含抗性基因与现有已知的Ｐｍ＿２，Ｐｍ＿６和Ｐｍ＿８抗病基因不同。
Powdery mildew resistance in our country is very small variety of cultivars, including Red Crouching, Grasshopper wheat and white winter wheat identified by many, high resistance to powdery mildew. After years of identification in Nanjing conditions, both seedling or adult-resistant powdery mildew. The three peasant families were crossed with the susceptible cultivars and the resistant cultivars containing the known disease resistance genes respectively. The genetic analysis of the resistance of the three offspring was carried out. The results showed that each of the three peasant families contained one pair of dominant resistance The result of site - specific hybridization analysis showed that the resistance genes contained in these genes were different from the known Pm_2, Pm_6 and Pm_8 resistance genes.