Resistance to Bt maize by western corn rootworm: insights from the laboratory and the field
Resistance to Bt maize by western corn rootworm: insights from the laboratory and the field
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DOI：
10.1016/j.cois.2016.04.001
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发表时间：
2016-06-01
影响因子：
5.3
通讯作者：
Gassmann, Aaron J.
中科院分区：
文献类型：
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作者：
Gassmann, Aaron J.
玉米根虫是玉米的一种严重害虫。从2003年开始，西方玉米根虫的管理包括转基因玉米，这种玉米产生从苏云金芽孢杆菌（Bt）中提取的杀虫毒素。第一批Bt玉米杂交种产生了Cry3Bb1，但后来又引入了其他Bt毒素，包括eCry3.1Ab、mCry3A和Cry34/ 35Ab1。实验室选择实验发现，经过3到7代的选择，西部玉米根虫可以对所有类型的Bt玉米产生抗性。到2009年，田间进化的抗Cry3Bb1玉米的案例已经确定，种群也显示出对mCry3A玉米的交叉抗性。可能导致抗性的因素是缺乏高剂量的Bt毒素用于靶向根虫的玉米，以及抗性的适应性成本最小。
Western corn rootworm is a serious pest of maize. Beginning in 2003, management of western corn rootworm included transgenic maize that produces insecticidal toxins derived from the bacterium Bacillus thuringiensis (Bt). The first Bt maize hybrids produced Cry3Bb1, but additional Bt toxins have since been introduced, including eCry3.1Ab, mCry3A and Cry34/ 35Ab1. Laboratory selection experiments found that western corn rootworm could develop resistance to all types of Bt maize following three to seven generations of selection. By 2009 cases of field-evolved resistance to Cry3Bb1 maize had been identified, with populations also showing cross resistance to mCry3A maize. Factors likely contributing to resistance were the lack of a high dose of Bt toxin for maize targeting rootworm and minimal fitness costs of resistance.