The resistance of more than 700 rice parents to rice sheath blight in different regions of China was identified indoor by the method of inoculation.The indices resistance level and significance were analyzed in the experiments.Disease resistance identification analysis indicated that the disease resistances among the parents were significantly different.700 parents were classified into 4 types:resistance,moderate resistance,moderate susceptibility and susceptibility.25 resistance parents and 21 moderate resistance parents were screened from all the parents in this study.Others were moderate susceptibility and susceptibility parents.Finally,the results would provide reference to select the high resistance to rice sheath blight breeding samples and gene resources.

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.