Ecological Risk Assessment of Transgenic Rice by Using the Facultative Feeding of Cyrtorhinus lividipennis

doi:10.16409/j.cnki.2095-039x.2016.03.005

Abstract

Abstract: The effect of genetically modified (GM) crops on natural enemies is an essential part of ecological safety assessment of GM crops. The potential risk of genetically modified herbicide-tolerant (GMHT) rice Bar68-1 on Cyrtorhinus lividipennis, a natural enemy for the brown planthopper (BPH) with facultative feeding on honeydew of BPH and bleeding sap of rice plants, was evaluated in the laboratory. Results showed that longevity of male (67.5 d) and female (75.9 d) adults of C. lividipennis fed on BPH honeydew was significantly longer than those in the BPH fed water only (control). The longevity of female adults fed on bleeding sap of rice plants (58.1 d) was prolonged, too. However, the number of BPH eggs preyed by C. lividipennis per day significantly decreased in female adult of C. lividipennis fed BPH honeydew (23) and bleeding sap of rice plants (24.9). The adult longevity (male 61 d, female 67.6 d) and predatory capacity (24.9 eggs preyed per day) of C. lividipennis fed GMHT rice Bar68-1 were not significantly different from those of the insects fed untransformed parental cultivar D68 or a BPH-susceptible rice variety, Taichung Native 1, whether C. lividipennis was fed plant bleeding sap or BPH honeydew. The results suggest that adult longevity and predatory capacity of C. lividipennis are not affected by GMHT Rice Bar68-1 regardless of its facultative feeding on BPH honeydew or plant bleeding sap, so the transgenic rice will not bring new ecological risks to one of the most important predators of BPH in rice ecosystem.

Key words: transgenic rice, Cyrtorhinus lividipennis, Nilaparvata lugens, facultative feeding, honeydew, bleeding sap

CLC Number:

JIANG Xianbin, HUANG Qian, LING Yan, CHEN Yuchong, WU Biqiu, HUANG Suosheng, LI Cheng, FU Chengqiang, HUANG Fengkuan, LONG Liping. Ecological Risk Assessment of Transgenic Rice by Using the Facultative Feeding of Cyrtorhinus lividipennis[J]. journal1, 2016, 32(3): 311-317.

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