论文部分内容阅读
稻瘟病是日本水稻最主要的病害之一。日本早在四十年代就培育出第一批抗病品种,以后不断地利用国内外抗性遗传质转育新的抗病品种,目前生产上种植面积较大的十多个品种,都具有一定的抗病性,这大大减轻了稻瘟病的危害程度。但是,随着稻瘟病新的生理小种不断出现,使一个新品种3—5年就丧失了抗性,因此,如何培育高抗的品种,特别是培育具有圃场(田间)抗性的品种及其鉴定方法,是育种单位重要研究课题。目前日本东北农试场和爱知县山间农试场是抗稻瘟病育种的中心。
Rice blast is one of the most important diseases of Japanese rice. Japan cultivated the first batch of disease-resistant varieties as early as the forties, and continuously used new varieties of resistant varieties at home and abroad for resistance breeding. At present, more than ten varieties with larger planting areas have certain varieties Of the disease resistance, which greatly reduced the degree of harm of rice blast. However, as new races of rice blast emerge, new varieties lose their resistance in 3-5 years, so how to breed highly resistant breeds, particularly nursery (field) resistant breeds And its identification method, is an important research topic breeding unit. At present, the agricultural experiment sites in northeast Japan and mountainous areas in Aichi Prefecture are the centers for blast resistance breeding.