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Population Dynamics of Sesamia inferens on Transgenic Rice Expressing Cry1Ac and CpTI in Southern China

文献类型： 外文期刊

作者： Han, Lanzhi 1 ; Liu, Peilei 2 ; Wu, Kongming 1 ; Peng, Yufa 1 ; Wang, Feng 3 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100094, Peoples R China

2.Minist Agr, Dev Ctr Sci & Technol, Beijing 100026, Peoples R China

3.Fujian Acad Agr Sci, Key Lab Agr Genet Engn, Fuzhou 350003, Peoples R China

关键词： Molecular Genetics: Biochemistry and Molecular Biophysics;Pest Assessment Control and Management;Horticulture: Agriculture

期刊名称：ENVIRONMENTAL ENTOMOLOGY （ 影响因子：2.377； 五年影响因子：2.298 ）

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收录情况： SCI

摘要： Genetically modified insect-resistance rice lines containing the cry1Ac gene from Bacillus thuringiensis (Bt) or the CpTI (cowpea trypsin inhibitor) gener developed for the management of lepidopterous pests are highly resistant to the major target pests, Chilo suppressalis (Walker), Cnaphalocrocis medinalis (Guenee), and Scirpophaga incertulas (Walker), in the main rice-growing areas of China. However, the effects of these transgenic lines on Sesamia inferens (Walker), an important lepidopterous rice pest, are currently unknown. Because different insect species have varying susceptibility to Bt insecticidal proteins that may affect population dynamics, research into the effects of these transgenic rice lines on the population dynamics of S. inferens was conducted in Fuzhou, southern China, in 2005 and 2006. The results of laboratory, field cage, and field plot experiments show that S. inferens has comparatively high susceptibility to the transgenic line during the early growing season, with significant differences observed in larval density and infestation levels between transgenic and control lines. Because of a decrease in Cry1Ac levels in the plant as it ages, the transgenic line correlation between the changing expression of Cry1Ac and the impact of transgenic rice on the population dynamics of S. inferens during the season. These results indicate that S. inferens may become a major pest in fields of prospective commercially released transgenic rice, and more attention should be paid to developing an effective alternative management strategy.

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