中文摘要：转基因作物对非靶标生物造成的生态风险应在其种植前严格评估。本文评估了三年内新型转cry1Ab/vip3H基因水稻对水稻农业生态系统中节肢动物群落的影响，并通过PRCs研究节肢动物在采样日期的变化。研究发现，除了寄生昆虫，Cry1Ab/Vip3H水稻对每一物种的季节性密度和比例不会产生重大影响；Cry1Ab/Vip3H水稻对腐生生物的季节性密度有显著影响，而对其相对丰度没有影响；四种水稻品种的群落指数大致一致。PRCs显示在过去两年，水稻品种间有轻微的群落差别，而水稻类型仅占节肢动物群落变化的1.0-3.5%；而采样日期显示这些群落的差异有32.1-67.6 %，这些差异可能是由于捕食者丰富度的变化，并不直接是Bt蛋白质的影响。研究结果表明，这种新型转cry1Ab/vip3H基因水稻对节肢动物群落不会造成意外风险。
外文摘要：The ecological risks to nontarget organisms should be rigorously assessed before Bt crops are released. Here, the impacts of a new Cry1Ab/Vip3H rice line on arthropod communities in rice agroecosystems were evaluated across 3 yr. Arthropods collected via vacuum were sorted into five guilds. The abundance and proportion of each guild as well as community-level parameters were determined in Cry1Ab/Vip3H and control rice fields. Changes in arthropod species assemblage over sampling dates were investigated by principal response curves (PRCs). Cry1Ab/Vip3H rice did not exert significant impacts on the seasonal density and proportion of each guild, except parasitoids. Detritivore seasonal density, but not its relative abundance, was significantly affected by Cry1Ab/Vip3H rice. Four community indices (species richness S, Shannon-Wiener index H', Simpson index D, and evenness index J') were similar between rice types. PRCs revealed a slight community difference between rice types in the past two tested years, with rice types accounting for 1.0-3.5% of the variance among arthropod communities. However, sampling dates explain 32.1-67.6% for these community differences. Of the 46 taxa with higher species weights, 26.1% of the taxa were significantly different, including seven taxa with higher abundance and five with lower density in Cry1Ab/Vip3H rice fields. These differences may be attributed to change in abundance of prey or hosts but not to direct effects of Bt proteins. We infer that this new Cry1Ab/Vip3H rice line poses no unintended ecological risks to the arthropod community.
外文关键词：Transgenic rice；crylAb；vip3H；epsps；arthropod
作者：Lu, Zengbin；Dang, Cong；Han, Naishun；等
作者单位：浙江大学
期刊名称：ENVIRONMENTAL ENTOMOLOGY
期刊影响因子：1.315
出版年份：2016
出版刊次：4
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