【摘要】 种植抗性品种是预防水稻稻瘟病最有效、最经济和环保的方式之一。目前农业生产上推广种植的抗病品种在数年内抗性减弱,甚至丢失,这可能与寄主体内的抗性基因丧失或相对应的无毒基因发生变异有关。本文综述了稻瘟病菌的致病机理、稻瘟病菌发生变异的原因、稻瘟病菌无毒基因发现与克隆以及稻瘟病的相关防治策略,以期为稻瘟病防治提供理论基础。更多还原

【Abstract】 Using blast-resistant varieties for cultivation is one of the most effective,economical and environmentally friendly ways to prevent the disease on rice(Oryzae sativa L.).However,it has been noticed recently that the resistance of somedisease tolerant-rice being promoted for the purpose began to diminish or even disappear.The phenomenon was attributed to the disappearance of host resistance genes or the mutations on avirulence genes of the plants.This article reviews the relevant pathogenic mechanisms,possible cause(s)for the reduction or loss on the blast-resistance,potential remedies,and search for the avirulence genes for cloning and recoverying in an attempt to resolve the problem at hand.更多还原