建模西方玉米根萤叶甲，Diabrotica virgifera virgifera（鞘翅目：叶甲科），在 Bt 玉米中的成熟延迟和抗性进化。
Modeling a western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae), maturation delay and resistance evolution in Bt corn.
机构信息
Department of Entomology, University of Illinois, Urbana, IL, USA.
出版信息
Pest Manag Sci. 2014 Jun;70(6):996-1007. doi: 10.1002/ps.3642. Epub 2013 Oct 2.
BACKGROUND
Emergence delay and female-skewed sex ratios among adults of Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) from Bt corn have been reported in field studies. The authors used a simulation model to study the effect of a maturation delay and a female-skewed sex ratio for D. v. virgifera emerging from Bt corn on the evolution of Bt resistance.
RESULTS
The effect of skewed toxin mortality in one sex on evolution of Bt resistance was insignificant. An emergence delay among resistant beetles from Bt corn slowed resistance evolution. A shift in the time of emergence for homozygous susceptible beetles from Bt corn did not have a significant effect on the evolution of Bt resistance in D. v. virgifera.
CONCLUSION
This simulation study suggested that skewed toxin mortality in one sex and an emergence delay for beetles in Bt corn are not major concerns for managing resistance by D. v. virgifera to single-toxin or pyramided Bt corn.
背景
田间研究报告显示，转 Bt 玉米中玉米根萤叶甲（Diabrotica virgifera virgifera LeConte）成虫出现时间延迟和雌雄性别比例偏雌性化。作者利用模拟模型研究了从转 Bt 玉米中出现的成熟延迟和雌性偏性性别比例对 D. v. virgifera 产生的影响Bt 抗药性的进化。
结果
毒素死亡率偏性对一种性别的影响Bt 抗药性的进化并不显著。来自转 Bt 玉米的抗性甲虫的出现延迟减缓了 Bt 抗性的进化。来自转 Bt 玉米的纯合敏感甲虫出现时间的变化对 D. v. virgifera 的 Bt 抗性进化没有显著影响。
结论
这项模拟研究表明，一种性别中毒素死亡率偏性和转 Bt 玉米中甲虫的出现延迟并不是管理 D. v. virgifera 对单一毒素或组合 Bt 玉米产生抗性的主要关注点。
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