中文摘要：转基因在野生种群中的持续存在可能导致非预期的生态后果，且转基因的持久性和渗入性潜力取决于转基因杂交作物的适应性。为了探究野生杂交水稻在转基因和基因型*环境上的适应性，作者在不同地点对转基因抗虫水稻（CpTI和Bt/CpTI）和野生稻的11个杂交后代进行了昆虫抗性比较。研究发现，不同环境条件下不同野生亲本转基因后代的适应性不同，这表明杂交后代转基因的适应性主要取决于受体植株的遗传背景和生长环境；在高昆虫压力条件下，仅在一些杂交后代中发现了转基因所赋予的适应性优势，这表明野外环境中目标昆虫的多少影响了抗虫基因在野生稻种群中的持久性和扩散性。研究结果表明，在不同的环境条件下不同遗传背景的野生稻种群中转基因的演化是不同的。
外文摘要：The persistence of transgenes in wild populations may cause unintended ecological consequences, and the possibility of transgenes' persistence and introgression is dependent on fitness performance of transgenic crop-wild hybrids. To investigate the effects of transgene and genotypexenvironment on the fitness of crop-wild rice hybrids, a total of 11 cross-combination progenies between insect-resistant transgene (CpTI and Bt/CpTI) rice lines and wild rice (Oryza rufipogon) were evaluated at different sites with contrasting insect treatments. The results showed that fitness performance varied between transgenic hybrids having different wild parents and under different environmental conditions, indicating that fitness effects of transgenes on hybrid progenies depend heavily on the genetic background of recipient plants and growing environment. Significant fitness advantages conferred by transgenes were found only in some hybrids under high insect pressure condition, demonstrating that the level of target insects in the field environment influences the persistence and spread of insect-resistant transgenes in wild rice populations. These findings suggest that evolutionary fate of escaped transgenes is different in wild populations with diverse genetic backgrounds under various environmental conditions.
外文关键词：Crop-wild hybrid; cross-combination; fitness performance; genotype x environment; rice; transgene persistence
作者：Dong, S. S.; Xiao, M. Q.; Ouyang, D. X.; 等.
作者单位：Fudan Univ
期刊名称：ANNALS OF APPLIED BIOLOGY
期刊影响因子：2.046
出版年份：2017
出版刊次：9
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