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防治稻瘟最经济有效的措施是培育、推广抗病良种。但是由于稻瘟病菌生理小种分化频繁,一个抗病品种往往大面积推广二至十年之后因优势小种的变迁而丧失抗性,给抗病育种工作带来很大困难。为使品种的抗性相对稳定,各国植物病理学家或作物育种学家的学术观点殊不一致。有人认为要获得稳定抗性应着眼于积累微效的抗病基因,以对抗小种的专化致病性。有人认为应利用具有高抗效能的主要抗性基因,对多数小种表现广谱抗性。也有人则
The most economical and effective measure to control rice blast is to cultivate and popularize disease resistant varieties. However, due to the frequent differentiation of M. grisea physiological races, one resistant variety tends to lose its resistance after two to ten years due to the change of dominant races, which brings great difficulties to disease-resistant breeding. In order to make the resistance of breeds relatively stable, the academic opinions of plant pathologists or crop breeders in different countries are different. Some people think that to obtain stable resistance should focus on the accumulation of micro-effective disease-resistance genes to combat the specialization of small-scale pathogenicity. Some people think that should use the main resistance gene with high anti-efficiency, the majority of races showed broad-spectrum resistance. Others are