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Reduced weed seed shattering by silencing a cultivated rice gene: strategic mitigation for escaped transgenes

文献类型： 外文期刊

作者： Yan, Huanxin 1 ; Li, Lei 1 ; Liu, Ping 1 ; Jiang, Xiaoqi 1 ; Wang, Lei 1 ; Fang, Jia 1 ; Lin, Zhimin 2 ; Wang, Feng 3 ; Su, 1 ;

作者机构： 1.Fudan Univ, Dept Ecol & Evolutionary Biol, Minist Educ, Key Lab Biodivers & Ecol Engn, Songhu Rd 2005, Shanghai, Peoples R China

2.Fujian Acad Agr Sci, Fujian Prov Key Lab Genet Engn Agr, Wusi Rd 247, Fuzhou, Peoples R China

3.Fujian Acad Agr Sci

关键词： Transgene mitigation;Environmental biosafety;GE rice;Artificial microRNA;Antisense RNA;Gene expression

期刊名称：TRANSGENIC RESEARCH （ 影响因子：2.788； 五年影响因子：2.377 ）

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收录情况： SCI

摘要： Transgene flow form a genetically engineered (GE) crop to its wild relatives may result in unwanted environmental consequences. Mitigating transgenes via introducing a gene that is disadvantageous to wild relatives but beneficial to crops, and is tightly-linked with the target transgenes, may provide a promising solution to limit the spread of transgenes in wild/weedy populations. Here we demonstrate a novel system with significantly reduced seed shattering in crop-weed hybrid descendants by partially silenced expression of the seed-shattering gene SH4 in cultivated rice, using artificial microRNA and antisense RNA techniques. Accordingly, fewer seeds were found in the soil of the field plots where transgenic hybrid lineages were grown. However, no differences in productivity-related traits were detected between GE and non-GE cultivated rice. To silence seed-shattering genes provides a useful strategy to reduce the potential environmental impacts caused by transgene flow from commercial GE rice to weedy rice, in addition to the control of weedy rice.

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