四川水稻纹枯病菌分离、纯化及致病力鉴定

Isolation,Purification and Pathogenicity Identification of Rice Sheath Blight from Sichuan Province

在四川特殊的生态条件下,通过对四川省东、南、西、北、中5个区域的55个具有代表性的县(市)水稻纹枯病样本进行分离、纯化与致病力鉴定。田间致病力鉴定研究发现,各菌株间致病力差异显著。通过对这些来自不同县(市)的病原菌与不同抗性水平水稻品种之间致病力差异比较,了解纹枯病菌的分布特点和致病力差异,为有效控制其流行、减少水稻纹枯病对水稻、玉米等农作物的危害打下基础,也为筛选到高抗纹枯病的育种材料和基因资源提供条件。

Fifty-five rice sheath blight samples were collected in rice from five distinctive ecological regions of Sichuan province. The 55 representative samples were isolated and purified,and field pathogenicity identification were analyzed. Pathogenicity identification analysis indicated that the pathogenicity among the strains were significantly different. Different pathogenic fungi and different resistance rice race had the pathogenicity significant different from the 55 counties.The results showed that we would find rice sheath blight and pathogenicity distribution characteristics,in order to control the rice sheath blight epidemic and reduce the infection to rice or maize. Finally, it would provide reference to select the high resistance to rice sheath blight breeding samples and gene resoures.