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期 刊 ：植物保护学报 2005年

关键词：亚洲玉米螟；GK22；苏抗103；抗虫性；

Keywords:Ostrinia furnacalis, GK22, Sukang103, resistance,

摘 要 ：通过室内饲养研究转Bt基因抗虫棉GK22、苏抗103对亚洲玉米螟的抗性。用GK22和苏抗103及其受体亲本的不同器官饲喂玉米螟初孵幼虫和3龄幼虫,比较棉花苗期至蕾期、花期和铃期玉米螟幼虫的死亡率,测定死亡率的方差分析差异和平均幼虫存活综合指数。结果表明:GK22和苏抗103与其受体亲本比较对玉米螟都具较高的抗性,且GK22抗性高于苏抗103,GK22和苏抗103不同生育阶段抗性顺序为苗期至蕾期＞花期＞铃期,对玉米螟抗性表现为1龄的抗性高于3龄,

Abstract:The resistance of GK22 and Sukang103, two varieties of transgenic Bt cotton, to Ostrinia furnacalis were studied in laboratory. The newly hatched larvae and the 3rd instar larvae were reared with the different organs of different growth periods of GK22 and Sukang103 and their parents, respectively. The mortality of larvae of O. furnacalis in different growth periods of cotton was compared and analysis of variance of the mortality of larvae and average synthesis index of survival rate were tested. The results showed that the resistances of GK22 and Sukang103 to the larvae were much higher than those of their parents and the resistance of GK22 was higher than that of Sukang103. The sequence of resistances ability of GK22 and Sukang103 was the seedling and the square periods ＞ the blossom period ＞the boll period. The resistance to the 1st instar larvae was higher than that to the 3rd instar larvae.

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