Abstract:

Panicle main characters and false smut resistance of 205 new hybrid late indica rice combinations from the State of the Yangtze River, Hunan and Hubei rice regional trials were studied by artificial inoculation. The results showed that there was significant difference between the new hybrid late indica rice combinations with false smut resistance of Yangtze River middle and lower reaches, resistance of majority combinations was weaker, above middle susceptible accounted for 75.12%. Hybrid late indica rice panicle main characters were closely related with rice false smut resistance, the resistance combinations were fewer total grains per panicle, fewer branches per panicle, fewer grain density, susceptible combinations were the opposite, resistant, susceptible combinations displayed significantly difference in the panicle main characters. Grain number, branch number and grain density was significantly positively associated with resistance to false smut and the order of correlation between the number of grain > number of branches > grain density. The difference between spike length of resistant and susceptible was not significant and spike length was no significant correlation with resistance to rice false smut. Ear disease rate was significantly associated with disease index.