Guoping Li, Hongqiang Feng, Tingjie Ji, Jianrong Huang, Caihong Tian
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引用次数: 16
Abstract
Transgenic crops that produce Bacillus thuringiensis (Bt) toxins are effective tools for controlling lepidopteran pests. However, the degree of susceptibility to Bt toxins differs among various pest species due to relatively narrow spectrum and high selectivity of such toxins. Bt corn hybrids for Chinese market were designed to target Asian corn borer Ostrinia furnacalis (Guenée), while their efficacy against other lepidopteran pests are not well defined, such as Conogethes punctiferalis (Guenée), Helicoverpa armigera (Hübner), Agrotis ypsilon (Rottemberg), and Mythimna separata (Walker), which are also important lepidopteran pests on corn in the Huang-Huai-Hai Summer Corn Region of China. To determine what type of Bt corn is suitable for this region, the efficacy of five Bt toxins, i.e., Cry1Ab, Cry1Ac, Cry1F, Cry2Ab, and Vip3A, to these five lepidopteran species was evaluated in laboratory. Both O. furnacalis and C. punctiferalis showed similar high susceptibility to all five Bt toxins. A. ypsilon and M. separate were less sensitive to Cry1Ab and Cry1Ac than the other species. H. armigera, A. ypsilon and M. separate were less sensitive to Cry1F than O. furnacalis and C. punctiferalis. H. armigera was more sensitive to Cry2Ab than other tested species. All five species were equally sensitive to Vip3A, though their LC50s were all relatively higher. These findings suggest that the first generation Bt corn expressing single Cry1 toxin should not be the first choice because of the potential risk of control failure or less efficacy against H. armigera, A. ypsilon or M. separate. The second-generation Bt corn expressing Cry1 and Cry2 toxins, or the third generation Bt corn expressing Cry1, Cry2 and Vip3A toxins might produce better protection of corn in the Huang-Huai-Hai Summer Corn Region of China.
期刊介绍：
GM Crops & Food - Biotechnology in Agriculture and the Food Chain aims to publish high quality research papers, reviews, and commentaries on a wide range of topics involving genetically modified (GM) crops in agriculture and genetically modified food. The journal provides a platform for research papers addressing fundamental questions in the development, testing, and application of transgenic crops. The journal further covers topics relating to socio-economic issues, commercialization, trade and societal issues. GM Crops & Food aims to provide an international forum on all issues related to GM crops, especially toward meaningful communication between scientists and policy-makers.
GM Crops & Food will publish relevant and high-impact original research with a special focus on novelty-driven studies with the potential for application. The journal also publishes authoritative review articles on current research and policy initiatives, and commentary on broad perspectives regarding genetically modified crops. The journal serves a wide readership including scientists, breeders, and policy-makers, as well as a wider community of readers (educators, policy makers, scholars, science writers and students) interested in agriculture, medicine, biotechnology, investment, and technology transfer.
Topics covered include, but are not limited to:
• Production and analysis of transgenic crops
• Gene insertion studies
• Gene silencing
• Factors affecting gene expression
• Post-translational analysis
• Molecular farming
• Field trial analysis
• Commercialization of modified crops
• Safety and regulatory affairs
BIOLOGICAL SCIENCE AND TECHNOLOGY
• Biofuels
• Data from field trials
• Development of transformation technology
• Elimination of pollutants (Bioremediation)
• Gene silencing mechanisms
• Genome Editing
• Herbicide resistance
• Molecular farming
• Pest resistance
• Plant reproduction (e.g., male sterility, hybrid breeding, apomixis)
• Plants with altered composition
• Tolerance to abiotic stress
• Transgenesis in agriculture
• Biofortification and nutrients improvement
• Genomic, proteomic and bioinformatics methods used for developing GM cops
ECONOMIC, POLITICAL AND SOCIAL ISSUES
• Commercialization
• Consumer attitudes
• International bodies
• National and local government policies
• Public perception, intellectual property, education, (bio)ethical issues
• Regulation, environmental impact and containment
• Socio-economic impact
• Food safety and security
• Risk assessments
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