High-Dose Assessment of Transgenic Insect-Resistant Maize Events against Major Lepidopteran Pests in China
文献类型： 外文期刊
第一作者： Li, Guoping
作者： Li, Guoping;Ji, Tingjie;Feng, Hongqiang;Zhao, Shengyuan;Wu, Kongming
作者机构：
关键词： transgenic insect-resistant maize; bioassay; target pests; high dose
期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）
ISSN：
年卷期： 2022 年 11 卷 22 期
页码：
收录情况： SCI
摘要： Lepidopteran pests present a key problem for maize production in China. In order to develop a new strategy for the pest control, the Chinese government has issued safety certificates for insect-resistant transgenic maize, but whether these transformation events can achieve high dose levels to major target pests is still unclear. In this paper, the transformation events of DBN9936 (Bt-Cry1Ab), DBN9936 x DBN9501 (Bt-Cry1Ab + Vip3A), Ruifeng 125 (Bt-Cry1Ab/Cry2Aj), and MIR162 (Bt-Vip3A) were planted in the Huang-huai-hai summer corn region of China to evaluate the lethal effects on major lepidopteran pests, Spodoptera frugiperda, Helicoverpa armigera, Ostrinia furnacalis, Conogethes punctiferalis, Mythimna separata, Leucania loreyi, and Athetis lepigone, using an artificial diet containing lyophilized Bt maize tissue at a concentration representing a 25-fold dilution of tissue. The results showed that the corrected mortalities of DBN9936 (Bt-Cry1Ab), DBN9936 x DBN9501 (Bt-Cry1Ab + Vip3A), Ruifeng 125 (Bt-Cry1Ab/Cry2Aj), and MIR162 (Bt-Vip3A) to the seven pests were in the ranges 53.80 similar to 100%, 62.98 similar to 100%, 57.09 similar to 100%, and 41.02 similar to 100%, respectively. In summary, the events of DBN9936, DBN9936 x DBN9501, and MIR162 reached high dose levels to S. frugiperda. DBN9936 x DBN9501 only at the R1 stage reached a high dose level to H. armigera. DBN9936, DBN9936 x DBN9501, and Ruifeng 125, at most growth stages, reached high dose levels to O. furnacalis, and these three events at some stages also reached high dose levels to A. lepigone. Ruifeng 125 presented a high dose level only to C. punctiferalis. However, no transformations reached high dose levels to either M. separata or L. loreyi. This study provides a support for the breeding of high-dose varieties to different target pests, the combined application of multiple genes and the commercial regional planting of insect-resistant transgenic maize in China.
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