Enhanced yield performance of <Emphasis Type="Italic">Bt</Emphasis> rice under target-insect attacks: implications for field insect management |
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Authors: | Hui Xia Bao-Rong Lu Kai Xu Wei Wang Xiao Yang Chao Yang Ju Luo Fengxiang Lai Wenli Ye Qiang Fu |
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Institution: | (1) Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, Fudan University, 200433 Shanghai, People’s Republic of China;(2) Ministry of Agriculture Environmental Safety Supervision and Inspection Center for Genetically Modified Plants in Hangzhou, China National Rice Research Institute, 310006 Hangzhou, China |
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Abstract: | 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 in insect 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 conditions with 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 the two 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. |
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