Evaluation of the resistance of transgenic potato plants expressing various levels of Cry3A against the Colorado potato beetle (Leptinotarsa decemlineata Say) in the laboratory and field
文献类型: 外文期刊
第一作者: Zhou, Zhaoxu
作者: Zhou, Zhaoxu;Pang, Jinhuan;Zhong, Naiqin;Tian, Yingchuan;Xia, Guixian;Wu, Jiahe;Zhou, Zhaoxu;Guo, Wenchao
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关键词: Colorado potato beetle (Leptinotarsa decemlineata Say);potato (Solanum tuberosum ssp. tuberrosum L);resistance;adaptation;Cry3A toxin
期刊名称:PEST MANAGEMENT SCIENCE ( 影响因子:4.845; 五年影响因子:4.674 )
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收录情况: SCI
摘要: BACKGROUND: The Colorado potato beetle (CPB), Leptinotarsa decemlineata Say, is a destructive pest. The CPB is a quarantine pest in China, but has now invaded the Xinjiang Uygur Autonomous Region and is continuing to spread eastwards. To control the damage and overspreading, transgenic potato plants expressing Cry3A toxin were developed, and their resistance to CPB was evaluated by bioassays in the laboratory and field in 2009,2010 and 2011. RESULTS: The insect resistance of the high-dose (HD) transgenic lines was significantly greater than the middle-dose (MD) and low-dose (LD) transgenic lines regarding leaf consumption, biomass accumulation and mortality. The HD and MD transgenic lines showed 100% mortality when inoculated with first- and second-instar larvae; however, the LD transgenic lines showed about 50% mortality. The HD transgenic lines exhibited a significantly higher yield than the MD and LD transgenic lines owing to their high CPB resistance. CONCLUSION: Commercially available transgenic potato plants with above 0.1% Cry3A of total soluble protein and NT control refugia could control damage, delay adaptation and halt dispersion eastwards. The two HD transgenic lines developed in this study, PAH1 and PAH2, are ideal for use as cultivars or germplasm to breed new cultivars.
分类号: S4
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