转cry1Ab/cry1Ac基因水稻对大螟幼虫的取食、生长及存活的影响

Food consumption,growth and survival of Sesamia inferens larvae on cry1Ab/cry1Ac-transformed gene Bt rice

本文采用活体生测的方法测定了转cry1Ab/cry1Ac基因水稻对大螟Sesamia inferens(Walker)幼虫的取食、生长以及存活的影响。结果表明,以转cry1Ab/cry1Ac基因水稻为食的大螟3龄和5龄幼虫的累计取食量和相对摄食率与对照相比都显著的减少。取食转Bt水稻后,大螟3龄和5龄幼虫体重均出现负增长。随着取食转基因水稻时间的延长,大螟3龄幼虫的校正死亡率可以达到100%,5龄幼虫的校正死亡率达到85%。

The food consumption, growth and survival of Sesamia inferens （Walker） larvae on crylAb/ crylAc- transformed rice were measured by in vitro bioassay. The results show that both the cumulative and relative food consumption rates of 3rd and 5th instar larvae feeding on Bt rice were significantly reduced compared to those of larvae fed on the control variety. The net growth of both 3rd and 5th instar larvae fed on Bt rice was negative. The corrected mortality of 3rd instar larvae mostly reached 100% , and that of5th instar larvae 85% , with increased time after feeding on Bt rice.