| 转基因水稻基因流的发生与生态学后果 |
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| 引用本文： | 刘勇波,李俊生,赵彩云,肖能文,关潇. 转基因水稻基因流的发生与生态学后果[J]. 应用生态学报, 2012, 23(6): 1713-1720 |
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| 作者姓名： | 刘勇波 李俊生 赵彩云 肖能文 关潇 |
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| 作者单位： | (中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012) |
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| 基金项目： | 转基因生物新品种培育重大专项(2012ZX08011002,2009ZX08011-013B);中国环境科学研究院院所基本科研业务专项(2011YSKY-08)资助 |
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| 摘 要： | 中国是水稻的起源中心之一，分布着丰富的野生种质资源.自转基因水稻获得安全证书以来，转基因水稻与其近缘野生种间的基因流受到广泛关注.本文对转基因水稻基因流的发生及其可能引起的生态学后果进行了综述和展望.认为转基因水稻能够与栽培稻、野生稻、杂草稻、稗草等成功杂交，但基因流发生频率较低且变化较大.基因流成功发生后，由于转基因水稻具转基因新性状而有适合度优势，转基因可能只通过少数几代就进入野生种群.当转基因植株进入野生种群并在自然条件下长期存在时，转基因植株与近缘野生种间的竞争关系和相对适合度将决定混合种群的动态变化.研究转基因水稻基因流的影响及其长期生态学后果对合理保护与利用野生种质资源具有重要意义.
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| 关 键 词： | 转基因水稻 近缘野生种 基因流 基因渐渗 |
Occurrence and ecological consequences of transgenic rice gene flow: a review |
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| Liu Yong-Bo,Li Jun-Sheng,Zhao Cai-Yun,Xiao Neng-Wen,Guan Xiao. Occurrence and ecological consequences of transgenic rice gene flow: a review[J]. The journal of applied ecology, 2012, 23(6): 1713-1720 |
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| Authors: | Liu Yong-Bo Li Jun-Sheng Zhao Cai-Yun Xiao Neng-Wen Guan Xiao |
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| Affiliation: | (State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China) |
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| Abstract: | Abstract: China is one of the origin centers of rice (Oryza sativa), with a distribution of abundant wild rice germplasm resources. Since the biosafety certificates were issued to Bt transgenic rice containing cry1Ac gene against lepidopteran pests, concerns are raised on the gene flow from transgenic rice to its wild relatives. This paper reviewed the occurrence of transgenic rice gene flow and its potential ecological consequences. Most studies suggested that transgenic rice could successfully hybridize with cultivated rice, wild rice (O. rufipogon), red rice (O. sativa f. spontanea), and barnyard grass (Echinochloa caudata), and the gene flow from transgenic rice had a lower occurrence frequency and was highly variable. Once the gene flow successfully occurred, the transgenes could introgress into a wild population within only a few generations because of the fitness advantage of transgenic rice due to the new selective traits of transgenes. When the transgenic plants invaded and persisted in a wild population, the dynamic changes of the mixed population would depend on the relative fitness and competition capability. To study the effects of the gene flow of transgenic rice and its long-term ecological consequences would have significance in rationally protecting and utilizing wild rice germplasm resources in China. |
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| Keywords: | transgenic rice wild relatives gene flow introgression. |
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