水稻品种抗白背飞虱筛选鉴定的初步研究

就国内外水稻品种资源共2595份对白背飞虱的抗性进行了鉴定。国内品种资源,高抗的有:698、安农769-2等3个;抗级的有:176393、安农769-6等5个;中抗的有:32选5、765等11个。国外引种,高抗的有:库鲁抗德拉韦布拉、IR289-98-2-3-2-2等3个;抗级的有:IR28、GBESAMBA48、Merak等11个;中抗品种有:IET5120、Kahatasamba、IR30、BKN6809-74-10、IR2053-241-3-2-3等28个。白背飞虱取食在抗性品种上的生存率显著地低于感虫对照品种,并且个体小,发育进度缓慢,后代群体密度亦比感虫品种低,说明水稻品种抗白背飞虱的机制属抗生范畴。

SCREENING RICE VARIETIES FOR RESISTANCE TO WHITEBACKED PLANTHOPPERS, SOGATELLA FURCIFERA HORVATH

Screening rice for resistance to whitebacked planthoppers was conducted under field and greehouse conditions in Anren County, Hunan province. Among the local varieties tested, 3 were highly resistant(such as 698 and An-Nong 769-2), 5 resistant(such as 176393 and An-Nong 769-6) and 11 moderately resistant(such as 32 Xuan 5 and 765); and among the foreign varieties tested, 3 were highly resistant(such as IR289-98-2-3-2-2), 11 resistant(such as IR28, GBESAMBA48 and Merak), and moderately resistant(such as IET5120, Kahatasamba, IR30, BKN6809-74-40 and IR2053-241-3-2-3).The insects fed on the resistant varieties had lower fecundity, higher mortality, smaller body size and lower population builation buildup, these indicated the presence of antibiosis factors.