Can transgenic rice cause ecological risks through transgene escape?  

作　　者：LU Baorong , SONG Zhiping and CHEN Jiakuan(Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai 200433, China) 

出　　处：《Progress in Natural Science:Materials International》2003年第1期17-24,共8页自然科学进展·国际材料（英文版）

基　　金：Supported by the National Natural Science Foundation of China for Distinguished Young Scholars (Grant No. 30125029)

摘　　要：Alien transgene escape from genetically engineered rice to non-transgenic varieties or close wild relatives (includingweedy rice) may lead to unpredictable ecological risks. However, for transgene escape to occur three conditions need to be met: (0 spatially, transgenic rice and its non-transgenic counterparts or wild relatives should have sympatric distributions; (ii) temporally, the flowering time of transgenic rice and the non-transgenic varieties or wild relatives should overlap; and (iii) biologically, transgenic rice and its wild relative species should have such a sufficiently close relationship that their interspecific hybrids can have normal generative reproduction. This paper presents research data on the geographic distribution, flowering habits, interspecific hybridization, and gene flow of cultivated rice (Oryza sativa) and its closely related wild relatives containing the AA genome. The objective is to estimate the possibility of transgene escape to non-transgenic rice varieties and wild relatives of rice, which may result in unpredictable ecological risks.Alien transgene escape from genetically engineered rice to non-transgenic varieties or close wild relatives (including weedy rice) may lead to unpredictable ecological risks. However, for transgene escape to occur three conditions need to be met: (i) spatially, transgenic rice and its non-transgenic counterparts or wild relatives should have sympatric distributions; (ii) temporally, the flowering time of transgenic rice and the non-transgenic varieties or wild relatives should overlap; and (iii) biologically, transgenic rice and its wild relative species should have such a sufficiently close relationship that their interspecific hybrids can have normal generative reproduction. This paper presents research data on the geographic distribution, flowering habits, interspecific hybridization, and gene flow of cultivated rice (Oryza sativa) and its closely related wild relatives containing the AA genome. The objective is to estimate the possibility of transgene escape to non-transgenic rice varieties and wild relatives of rice, which may result in unpredictable ecological risks.

关 键 词：oryza species transgene escape BIOSAFETY ecological risk INTROGRESSION gene flow. 

分 类 号：X820.4[环境科学与工程—环境工程]