A seed mixture increases dominance of resistance to Bt cotton in Helicoverpa zea.
A seed mixture increases dominance of resistance to Bt cotton in Helicoverpa zea.
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DOI：
10.1038/srep09807
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发表时间：
2015-05-07
影响因子：
4.6
通讯作者：
Carrière Y
中科院分区：
文献类型：
--
作者：
Brévault T;Tabashnik BE;Carrière Y
广泛种植的从苏云金杆菌（BT）中产生杀虫蛋白的转基因作物可以使农业受益，但害虫的适应威胁着它们的持续成功。不产生Bt毒素的宿主植物的避难所可以促进易感昆虫的生存并延迟抗性的进化，特别是如果抗性作为隐性性状遗传。然而，一直缺乏数据来比较Bt和非Bt种子种植在随机混合物与单独的块时的抗性的优势。在这里，我们报告的转基因棉花产生Bt毒素Cry1Ac和棉铃虫，棉铃虫，温室实验的结果表明，相对于一块Bt棉的种子混合物中的抗性的优势显着更高。在随机分布的零假设下，种子混合物中非Bt棉花植株上的幼虫比例也显著高于预期。在基于观察到的存活率的模拟中，相对于Bt和非Bt棉花的单独块，种子混合物中的抗性进化快2至4.5倍。这些研究结果支持以前的模拟结果表明，块避难所可能比种子混合物更有效地延迟抗性害虫与移动的幼虫和内在的低敏感性的毒素在Bt作物。
Widely grown transgenic crops producing insecticidal proteins from Bacillus thuringiensis (Bt) can benefit agriculture, but adaptation by pests threatens their continued success. Refuges of host plants that do not make Bt toxins can promote survival of susceptible insects and delay evolution of resistance, particularly if resistance is inherited as a recessive trait. However, data have been lacking to compare the dominance of resistance when Bt and non-Bt seeds are planted in random mixtures versus separate blocks. Here we report results from greenhouse experiments with transgenic cotton producing Bt toxin Cry1Ac and the bollworm, Helicoverpa zea, showing that the dominance of resistance was significantly higher in a seed mixture relative to a block of Bt cotton. The proportion of larvae on non-Bt cotton plants in the seed mixture was also significantly higher than expected under the null hypothesis of random distribution. In simulations based on observed survival, resistance evolved 2- to 4.5-fold faster in the seed mixture relative to separate blocks of Bt and non-Bt cotton. These findings support previous modelling results indicating that block refuges may be more effective than seed mixtures for delaying resistance in pests with mobile larvae and inherently low susceptibility to the toxins in Bt crops.
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影响因子：
3.7
作者：
Heuberger S;Ellers-Kirk C;Tabashnik BE;Carrière Y
通讯作者：
Carrière Y
影响因子：
46.9
作者：
Tabashnik, Bruce E.;Gassmann, Aaron J.;Carriere, Yves
通讯作者：
Carriere, Yves
影响因子：
4.1
作者：
Brevault, Thierry;Nibouche, Samuel;Carriere, Yves
通讯作者：
Carriere, Yves
影响因子：
2.2
作者：
Burkness, E. C.;O'Rourke, P. K.;Hutchison, W. D.
通讯作者：
Hutchison, W. D.
影响因子：
5
作者：
Ives, Anthony R.;Glaum, Paul R.;Andow, David A.
通讯作者：
Andow, David A.