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Persistence of transgenes in wild rice populations depends on the interaction between genetic background of recipients and environmental conditions

文献类型： 外文期刊

作者： Dong, S. S. 1 ; Xiao, M. Q. 1 ; Ouyang, D. X. 1 ; Rong, J. 3 ; Lu, B. -R. 1 ; Su, J. 5 ; Wang, F.; Chen, J. K. 1 ; Song, 1 ;

作者机构： 1.Fudan Univ, Inst Biodivers Sci, Minist Educ, Key Lab Biodivers & Ecol Engn, Shanghai 200438, Peoples R China

2.Minist Environm Protect, Nanjing Inst Environm Sci, Nanjing, Jiangsu, Peoples R China

3.Nanchang Univ, Minist Educ, Inst Life Sci, Ctr Watershed Ecol, Nanchang, Jiangxi, Peoples R China

4.Nanchang Univ, Minist Educ, Key Lab Poyang Lake Environm & Resource Utilizat, Nanchang, Jiangxi, Peoples R China

5.Fujian Acad Agr Sci, Fujian Prov Key Lab Genet Engn Agr, Fuzhou,

关键词： Crop-wild hybrid;cross-combination;fitness performance;genotype x environment;rice;transgene persistence

期刊名称：ANNALS OF APPLIED BIOLOGY （ 影响因子：2.75； 五年影响因子：2.942 ）

ISSN：

年卷期：

页码：

收录情况： SCI

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.

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