To analyze the correlation of rice resistance against black-streaked dwarf virus disease（ RBSDV） and small brown planthopper（ SBPH; Laodelphax striatellus Fallen）,49 rice varieties were conduced field inoculation ...To analyze the correlation of rice resistance against black-streaked dwarf virus disease（ RBSDV） and small brown planthopper（ SBPH; Laodelphax striatellus Fallen）,49 rice varieties were conduced field inoculation identification,artificial inoculation identification,antibiosis test and antixenosis test,respectively. There were more varieties with the incidence rate less than 20% in field inoculation. Field inoculation identification was greatly affected by external environment factors,and the incidence rates were significantly lower than that in artificial inoculation identification. In field inoculation and artificial inoculation identification,the incidence rates of indica rice varieties were lower than that of japonica rice varieties. Antibiosis test showed that all japonica rice varieties were susceptible to insect pests,and there were only five indica rice varieties with antibiosis value less than 81%. The antixenosis value of indica rice varieties was significantly lower than that of japonica rice varieties,and the resistance of indica rice varieties against SBPH was higher than that of japonica rice varieties. Correlation analysis of rice resistance against RBSDV and SBPH showed that the incidence rates of varieties in field identification had extremely positive correlation with its antixenosis to SBPH,but was irrelevant to antibiosis of varieties to SBPH. The incidence rates of varieties in artificial inoculation identification had significantly positive correlation with antixenosis and antibiosis of varieties to SBPH. Moreover,antixenosis of varieties had extremely positive correlation with incidence rates in both artificial inoculation identification and field inoculation identification. Therefore,insect-resistant varieties influenced virus transmitting effect of SBPH to a certain extent,and it could reduce the damage of RBSDV by cultivating resistant varieties against SBPH.展开更多
基金Supported by Science and Technology Support Project of Jiangsu Province(BE2013301)Agricultural Science and Technology Independent Innovation Fund of Jiangsu Province[CX[12]5112]National Rice Industry System[CARS-01-01A]
文摘To analyze the correlation of rice resistance against black-streaked dwarf virus disease（ RBSDV） and small brown planthopper（ SBPH; Laodelphax striatellus Fallen）,49 rice varieties were conduced field inoculation identification,artificial inoculation identification,antibiosis test and antixenosis test,respectively. There were more varieties with the incidence rate less than 20% in field inoculation. Field inoculation identification was greatly affected by external environment factors,and the incidence rates were significantly lower than that in artificial inoculation identification. In field inoculation and artificial inoculation identification,the incidence rates of indica rice varieties were lower than that of japonica rice varieties. Antibiosis test showed that all japonica rice varieties were susceptible to insect pests,and there were only five indica rice varieties with antibiosis value less than 81%. The antixenosis value of indica rice varieties was significantly lower than that of japonica rice varieties,and the resistance of indica rice varieties against SBPH was higher than that of japonica rice varieties. Correlation analysis of rice resistance against RBSDV and SBPH showed that the incidence rates of varieties in field identification had extremely positive correlation with its antixenosis to SBPH,but was irrelevant to antibiosis of varieties to SBPH. The incidence rates of varieties in artificial inoculation identification had significantly positive correlation with antixenosis and antibiosis of varieties to SBPH. Moreover,antixenosis of varieties had extremely positive correlation with incidence rates in both artificial inoculation identification and field inoculation identification. Therefore,insect-resistant varieties influenced virus transmitting effect of SBPH to a certain extent,and it could reduce the damage of RBSDV by cultivating resistant varieties against SBPH.
