中日两套鉴别品种的鉴别力研究

1982年,利用日本9个单基因的鉴别品种,把我国北方粳稻品种上分离的27个稻瘟病菌株(分属于4个中国小种)划分为11个小种。1983年,用清泽的12个鉴别品种测定了分属于7个中国小种的42个菌株。结果表明,42个分离菌中包括了19个日本小种。由此可以断定,日本鉴别品种和清泽鉴别品种具有比较高的鉴别生理小种的能力。利用由清泽鉴别品种任意选出的7个品种组成一套假设的鉴别品种,用三套假设的鉴别品种测定42个分离菌。前两套假设鉴别品种分别把42个菌株分为13个小种,后一套(?)品种划分42个菌株为9个小种。由这些结果可以断定,单基因的鉴别品种具有最高的小种鉴别能力。在理想的中国鉴别品种确立之前,可以利用清泽鉴别品种来研究我国北方稻作区的小种。它能为具已知抗病基因的抗病品种的布局提供有用的情报。

STUDY ON DIFFERENTIAL ABILITY OF CHINESE DIFFERENTIAL VARIETIES AND JAPANESE ONES

27 isolates belonging to 4 Chinese races of blast fungus,which wereisolated from japonica varieties in North China,were divided into 11races by using 9 Japanese differential varieties with single resistancegene in 1982.42 isolates,classified into 7 Chinese races,were determ-ined by 12 Kiyosawa’s differential varieties in 1983.The result indicatedthat 19 Japanese races were included in 42 isolates.It can be concludedthat kiyosawa’s differential varieties and Japanese ones have higher abi-lity differentiating...