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Field evaluation of effects of transgenic cry1Ab/cry1Ac,cry1C and cry2A rice on Cnaphalocrocis medinalis and its arthropod predators

查看全文 作　　者：XU [1,2]XueLiang;HAN [1]Yu;WU [1]Gang;CAI [1]WanLun;YUAN [1]BenQi;WANG [1]Hui;LIU [1]FangZhou;WANG [1]ManQun;HUA [1]HongXia 高影响力作者 机构地区：[1]Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;[2]Institute of Plant Protection, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China高影响力机构 出　　处：《Science China(Life Sciences)》索引2011年第54卷第11期,共10页高影响力期刊 基　　金：supported by National Genetically Modified Organisms Breeding Major Project:Technology of Environmental Risk Assessment on Transgenic Rice (Grant No. 2008ZX08011-001) 摘　　要：The impacts of transgenic Bt rice on target pests and their predators need to be clarified prior to the commercialization of Bt rice.In this study,the percentages of folded leaves of three transgenic Bt rice lines and non-transgenic parental rice line caused by Cnaphalocrocis medinalis were studied over two successive growing seasons.In addition,the population densities,relative abundance and population dynamics of C.medinalis and four species of its natural arthropod predators were investigated at three sites in China.The results showed that rice line significantly affected the percentages of folded leaves and population densities of C.medinalis larvae.Significantly higher percentages of folded leaves were observed on the non-transgenic rice compared with the three transgenic Bt rice on most sampling dates.Significantly higher densities of C.medinalis larvae and higher relative abundance of C.medinalis within phytophages were found on non-transgenic rice compared with three transgenic Bt rice at different sites across the study period.The population dynamics of C.medinalis larvae were significantly affected by rice line,rice line×sampling date,rice line×year,rice line×sampling date×year.However,there was little,if any,significant difference in the relative abundance,population density and population dynamics of the four arthropod predators between the three Bt rice lines and non-transgenic rice.The results of this study indicate that the Bt toxin in transgenic Bt rice can effectively suppress the occurrence of C.medinalis,but has no significant effects on the occurrence of the four predatory arthropod species. 关 键 词：转BT基因水稻 稻纵卷叶螟 节肢动物 捕食者 转基因水稻 评估 人口密度 相对丰度
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