马铃薯抗晚疫病和研究方法的探讨

作者查明有田间抗性品种的 R 基因有没实际意义。品种感染时期和等等是由田间抗性水平决定的。块茎的过敏性对于减少晚疫病所造成产量损失只有相对价值,实际上这样块茎既不能食用,也不能作种薯。田间抗病性研究应该注意到病程的区分,病程包括渗透期和菌丝体传播期。在田间抗病性的鉴定中,我们认为实验室田间鉴定方法比较好。

THE PHYTOPHTHORA BLIGHT RESISTANCE OF POTATO AND AN APPROACH TO THE STUDY

It is found out that the R gene containg the field resistance variety is without virtual meaning.for the infection period of variety and the grade determined the level of field resistance.The hyper-sensibility of tuber brings only a comparative value for decreasing the loss of output caused by phytophthora blight.In fact, neither the tuber of this kind could be eaten nor used as seed tuber.So the attention should be paid duing the study of field disease resistibility to the differences of course of disease including,two periods of osmosis and spread of mycelium.And in resPect to the identification of the field disase risistibility,we consider the lab field method is better.