Insect Resistance to Bt Crops: Possible Mechanism and Resistance Management Strategy
doi: 10.15886/j.cnki.rdswxb.2015.04.022
- Received Date: 2014-08-13
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Key words:
- Transgenic Bt crops /
- resistance mechanism /
- management strategy
Abstract: Transgenic Bt crops producing insecticidal crystalline proteins from Bacillus thuringiensis,so-called Cry toxins,have been proved useful in controlling insect pests. However,evolution of insect resistance threatens the continued success of the transgenic crops. Understanding how insects become resistant will provide the basis for insect resistance management. Here we review possible pest resistance mechanisms against transgenic Bt crops and different strategies to cope with resistance,such as high dose-refugee strategy,pyramiding or Cry gene stacking which express several toxins with different modes of action in the same plant,Bt plants with novel Cry toxins,and so on. These approaches should be proposed to deal with resistance in the field to assure successful use of Bt crops for an extended period of time.
Citation: | LIN Zhufeng, CHEN Haiyan, JI Xuncong. Insect Resistance to Bt Crops: Possible Mechanism and Resistance Management Strategy[J]. Journal of Tropical Biology, 2015, 6(4): 497-503. doi: 10.15886/j.cnki.rdswxb.2015.04.022 |