Enhanced yield performance of Bt rice under target-insect attacks: implications for field insect management

文献类型： 外文期刊

第一作者： Xia, Hui

作者： Xia, Hui;Lu, Bao-Rong;Xu, Kai;Wang, Wei;Yang, Xiao;Yang, Chao;Ye, Wenli;Luo, Ju;Lai, Fengxiang;Fu, Qiang

作者机构：

关键词： Oryza sativa;GE crop;Bt transgene;Insect resistance;Fitness;Field evaluation

期刊名称：TRANSGENIC RESEARCH （ 影响因子：2.788； 五年影响因子：2.377 ）

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收录情况： SCI

摘要： The rapid development of transgenic biotechnology has greatly promoted the breeding of genetically engineered (GE) rice in China, and many GE rice lines are in the pipeline for commercialization. To understand field performances of GE rice, key agronomic traits of two insect-resistant Bt rice lines that have been granted biosafety certificates for commercial production in China were evaluated together with their nontransgenic counterparts under environmental conditions with significant differences ininsect pressure. Results from the experiments showed enhanced field performances of the Bt GE rice lines compared with the non-GE counterparts for yield-related traits such as number of panicles and filled seeds per plant, under environmental conditionswith no insecticide application. No detectable underlying cost of the Bt transgene was observed in the two insect-resistant GE rice lines, particularly in the GE hybrid rice line. Results further indicated significantly greater yield performances of thetwo insect-resistant GE rice lines under environmental conditions with non-target insect control compared with no insect control. It is concluded from this study that insect-resistant Bt GE rice, particularly the hybrid line, has great potential to maintain its high yield when ambient insect pressure is high. In addition, proper application of insecticides to control non-target insects will guarantee optimal performance of insect-resistant Bt GE rice.

分类号： R394

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