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http://dx.doi.org/10.9787/KJBS.2018.50.4.406

Influences of Insect-Resistant Genetically Modified Rice (Bt-T) on the Diversity of Non-Target Insects in an LMO Quarantine Field  

Oh, Sung-Dug (Department of Agricultural Biotechnology, National Institute of Agricultural Sciences, RDA)
Park, Soo-Yun (Department of Agricultural Biotechnology, National Institute of Agricultural Sciences, RDA)
Chang, Ancheol (Department of Agricultural Biotechnology, National Institute of Agricultural Sciences, RDA)
Lim, Myung-ho (Department of Agricultural Biotechnology, National Institute of Agricultural Sciences, RDA)
Park, Soon Ki (School of Applied Biosciences, Kyungpook National University)
Suh, Sang Jae (School of Applied Biosciences, Kyungpook National University)
Publication Information
Korean Journal of Breeding Science / v.50, no.4, 2018 , pp. 406-414 More about this Journal
Abstract
This study was conducted to develop environmental risk assessments and biosafety guides for insect-resistant genetically modified rice in an LMO (Living Modified Organism) isolation field. In the LMO quarantine area of Kyungpook National University, the species diversities and population densities of non-target insects found on insect-resistant genetically modified rice (Bt-T), rice resistant to Cnaphalocrocis medinalis, and non-GM rice (Dongjin-byeo and Ilmi-byeo) were investigated. The Bt-T plants were, therefore, evaluated under field conditions to detect possible impacts on above ground insects and spiders. In 2016 and 2017, the study compared transgenic rice and two non-GM reference rice, namely Dongjin-byeo and Ilmi-byeo, at Gunwi. A total of 9,552 individuals from 51 families and 11 orders were collected from the LMO isolation field. From the three types of rice fields, a total of 3,042; 3,212; and 3,297 individuals from the Bt-T, Dongjin-byeo, and Ilmi-byeo were collected, respectively. There was no difference between the population densities of the non-target insect pests, natural enemies, and other insects on the Bt-T compared to non-GM rice. The data on insect species population densities were subjected to principal component analysis (PCA) without distinguishing between the three varieties, namely GM, non-GM, and reference cultivar, in all cultivation years. However, the PCA clearly separated the samples based on the cultivation years. These results suggest that insect species diversities and population densities during plant cultivation are determined by environmental factors (growing condition and seasons) rather than by genetic factors.
Keywords
Insect-resistant genetically modified rice (Bt-T); Biosafety; Non-target insect diversity;
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