中文摘要：转基因作物与其野生原种间转基因流所造成的生态影响在很大程度上取决于转基因所带来的适应性影响。这些影响的评估对转基因作物商业化前的生态风险评估来说至关重要。本文对两种抗虫转基因水稻（Bt，Bt/CpTI）、非转基因水稻与野生稻的F-1和 F-2杂交后代进行转基因适应性评价研究，且对杂交后代及其野生亲本的虫害情况和生命周期适应度进行了调查。研究发现，在高虫压下，野生稻亲本和转基因杂交稻后代的虫害情况无显著性差异；在高和低的昆虫压力下，野生亲本比转基因水稻杂交后代和非转基因水稻杂交后代表现出显着更大的相对存活率；在高虫压下，转基因水稻杂交后代比非转基因水稻杂交后代产出更多的种子。由于抗虫转基因水稻（Bt，Bt/CpTI）没有比野生稻的杂交后代表现出更强的抗虫性，因此我们预测从抗虫转基因水稻到野生稻的基因流动可能不会造成很大的生态风险。
外文摘要：Ecological impact caused by transgene flow from genetically engineered (GE) crops to their wild relatives is largely determined by the fitness effect brought by a transgene. To estimate such impact is critical for the ecological risk assessment prior to the commercialization of GE crops. We produced F-1 and F-2 hybrid descendants from crosses of two insect-resistant GE rice lines (Bt, Bt/CpTI) and their non-GE rice parent with a wild rice (Oryza rufipogon) population to estimate the transgenic fitness. Insect damages and life-cycle fitness of GE and non-GE crop-wild hybrid descendants as well as their wild parent were examined in a common-garden experiment. No significant differences in insect damages were observed between the wild rice parent and GE hybrid descendants under high-insect pressure. The wild parent showed significantly greater relative survival-regeneration ratios than its GE and non-GE hybrid descendants under both high- and low-insect pressure. However, more seeds were produced in GE hybrid descendants than their non-GE counterparts under high-insect pressure. Given that the introduction of Bt and Bt/CpTI transgenes did not provide greater insect resistance to crop-wild hybrid descendants than their wild parent, we predict that transgene flow from GE insect-resistant rice to wild rice populations may not cause considerable ecological risks.
外文关键词：Environmental impact; Fecundity and survival; Genetically modified organisms; Lepidopteran; Oryza sativa; Wild relative
作者：Li, Lei; Yang, Xiao; Wang, Lei; 等
作者单位：Fudan Univ
期刊名称：SCIENCE BULLETIN
期刊影响因子：1.789
出版年份：2016
出版刊次：9
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