A large-scale field study of transgene flow from cultivated rice (Oryza sativa) to common wild rice (O-rufipogon) and barnyard grass (Echinochloa crusgalli)

文献类型： 外文期刊

第一作者： Yuan, Qian-Hua

作者： Yuan, Qian-Hua;Shi, Lei;Qian, Qian;Liu, Wu-Ge;Kuang, Ba-Geng;Zeng, Da-Li;Liao, Yi-Long;Cao, Bin;Jia, Shi-Rong

作者机构：

关键词： barnyard grass;Echinochloa crusgalli;gene flow;Oryza rufipogon;Oryza sativa;rice

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

ISSN： 1467-7644

年卷期： 2006 年 4 卷 6 期

页码：

收录情况： SCI

摘要： The introgression of transgenes into wild relatives or weeds through pollen-mediated gene flow is a major concern in environmental risk assessment of transgenic crops. A large-scale (1.3-1.8 ha) rice gene flow study was conducted using transgenic rice containing the bar gene as a pollen donor and Oryza rufipogon as a recipient. There was a high frequency of transgene flow (11%-18%) at 0-1 m, with a steep decline with increasing distance to a detection limit of 0.01% by 250 m. To our knowledge, this is the highest frequency and longest distance of gene flow from transgenic rice to O. rufipogon reported so far. On the basis of these data, an adequate isolation distance from both conventional and transgenic rice should be taken for in situ conservation of common wild rice. Meanwhile, there is no evidence of transgene introgression into barnyard grass, even when it has coexisted with transgenic rice containing the bar gene for five successive years. Thus, the environmental risk of gene flow to this weedy species is of little concern.

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