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| The Influence of Transgenic cry1Ab/cry1Ac, cry1C and cry2A Rice on Non- Target Planthoppers and Their Main Predators Under Field Conditions |
| HAN Yu, XU Xue-liang, MA Wei-hua, YUAN Ben-qi, WANG Hui, LIU Fang-zhou, WANG Man-qun, WU |
| Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University |
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摘要 Transgenic Bt rice has been shown to be an effective means of controlling Lepidoptera pests of rice. However, the potential roles of transgenic rice on planthoppers and their predators need to be investigated before its commercialization. Population density, species dominance and population dynamics are important parameters of arthropods populations in field. So the impacts of three transgenic Bt rice strains expressing cry1Ab/cry1Ac, cry1C and cry2A on population density, species dominance and population dynamics of three species of planthoppers (Nilaparvata lugens, Sogatella furcifera and Laodelphax striatellus) and their three main predators (Cyrtorhinus lividipennis, Pirata subpiraticus and Theridium octomaculatum) were evaluated at three sites in Hubei Province, China, in the current study. The results showed that among three species of planthoppers, both in transgenic and non-transgenic rice field, the predominant species of planthoppers within phytophagous guild was S. furcifera at any site either growing season (46-50%). Significantly higher population density of N. lugens was observed in T2A-1 field relative to Minghui 63 field at Wuxue in 2010. The species dominance of predator, P. subpiraticus, in TT51 field was significantly higher than that in T1C-19 and T2A-1 fields in 2009 at Xiaogan site. Sampling date significantly influenced six arthropods except for P. subpiraticus in 2010. The interaction between rice strain×sampling date had no significant adverse effects on the population dynamics of three species of planthoppers and their predators, except for several individual species in 2009. The interaction among rice strain×sampling date×sampling site also had no significant effect on six arthropods except for S. furcifera in 2009. The results indicated that transgenic Bt rice expressing cry1Ab/cry1Ac, cry2A and cry1C had no significant adverse effects on the population dynamics of three planthoppers and their predators in most investigated data and sampling site.
Abstract Transgenic Bt rice has been shown to be an effective means of controlling Lepidoptera pests of rice. However, the potential roles of transgenic rice on planthoppers and their predators need to be investigated before its commercialization. Population density, species dominance and population dynamics are important parameters of arthropods populations in field. So the impacts of three transgenic Bt rice strains expressing cry1Ab/cry1Ac, cry1C and cry2A on population density, species dominance and population dynamics of three species of planthoppers (Nilaparvata lugens, Sogatella furcifera and Laodelphax striatellus) and their three main predators (Cyrtorhinus lividipennis, Pirata subpiraticus and Theridium octomaculatum) were evaluated at three sites in Hubei Province, China, in the current study. The results showed that among three species of planthoppers, both in transgenic and non-transgenic rice field, the predominant species of planthoppers within phytophagous guild was S. furcifera at any site either growing season (46-50%). Significantly higher population density of N. lugens was observed in T2A-1 field relative to Minghui 63 field at Wuxue in 2010. The species dominance of predator, P. subpiraticus, in TT51 field was significantly higher than that in T1C-19 and T2A-1 fields in 2009 at Xiaogan site. Sampling date significantly influenced six arthropods except for P. subpiraticus in 2010. The interaction between rice strain×sampling date had no significant adverse effects on the population dynamics of three species of planthoppers and their predators, except for several individual species in 2009. The interaction among rice strain×sampling date×sampling site also had no significant effect on six arthropods except for S. furcifera in 2009. The results indicated that transgenic Bt rice expressing cry1Ab/cry1Ac, cry2A and cry1C had no significant adverse effects on the population dynamics of three planthoppers and their predators in most investigated data and sampling site.
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Received: 14 January 2011
Accepted:
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| Fund: This research was supported by the National Genetically Modified Organisms Breeding Major Project: Technology of Environmental Risk Assessment on Transgenic Rice (2008ZX08011-001) and Technology of Environment Risk Assessment of Transgenic Rice on Rice Planthopper Population (2009ZX08011-009B). |
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Corresponding Authors:
Correspondence HUA Hong-xia, Ph D, Associate Professor, Tel: +86-27-87281218, Fax: +86-27-87281218, E-mail: huahongxia@mail.hzau.edu.cn
E-mail: huahongxia@mail.hzau.edu.cn
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| About author: HAN Yu, MSc, E-mail: han19860505@yahoo.com.cn |
Cite this article:
HAN Yu, XU Xue-liang, MA Wei-hua, YUAN Ben-qi, WANG Hui, LIU Fang-zhou, WANG Man-qun, WU .
2011.
The Influence of Transgenic cry1Ab/cry1Ac, cry1C and cry2A Rice on Non- Target Planthoppers and Their Main Predators Under Field Conditions . Journal of Integrative Agriculture, 10(11): 1739-1747.
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