해충저항성 Bacillus thuringiensis (Bt) 벼 급이가 벼물바구미(Lissorhoptrus oryzophilus)의 살충제 감수성에 미치는 영향

서지정보

· 발행기관 : 한국국제농업개발학회
· 수록지 정보 : 한국국제농업개발학회지 / 24권 / 2호
· 저자명 : 오성덕, 이기종, 손수인, 권용정, 김진서, 이장용, 박범석, 권순종, 서석철, 류태훈, 박종석, 안병옥, 조현석, 서상재

초록

해충저항성 Bacillus thuringiensis (Bt) 벼의 비표적곤충인 벼물바구미(Lissorhoptrus oryzophilus)에 대한 성충 전용살충제 Clothianidin 액상수화제의 살충제 감수성 시험을 실시한 결과, 72시간-LC50은 0.245 ml/L(95% 신뢰한계는 0.195~0.307 ml/L)이었으며, Bt벼의 모본으로 대조로 사용한 낙동벼의 72시간-LC50은 0.257 ml/L(95% 신뢰한계는 0.199~0.331 ml/L)이었다. 72시간-LC50은 낙동벼에서 다소 높았지만, 해충저항성 Bt벼 72시간-LC50이 낙동벼의 95% 신뢰한계 내에 포함되어, 두 품종의 LC50값에 유의성이 없는 것으로 판단된다.

영어초록

Insect-resistant transgenic rice, Bt rice was developed by inserting the mCry1Ac1, a modified gene from the soil bacterium Bacillus thuringiensis (Bt). For the biosafety assessment of this GM rice, we studied the effect on insecticide susceptibility of Rice Water Weevil (Lissorhoptrus oryzophilus) which is a nontarget insect pest and commonly used as a model organism in ecotoxicological studies. The Bt rice was confirmed to have the insertion of T-DNA and the protein expression by the polymerase chain reaction (PCR) and the ELISA analysis. As for the cumulative mortalities of Rice Water Weevil on insecticide, Clothianidin in Bt and non-GM counterpart, Nakdong rices were similar. The 72h-LC50 values of Bt and non-GM rices showed 0.245 ml/L and 0.257 ml/L respectively. As the 72h-LC50 vlaue of Bt rice was included within the 95% confidence limit of that of Nakdong rice slightly higher, the two varieties of the 72h-LC50 values were not significant. Thus, we found out there was a strong possibility that Bt rice didn't affect the insecticide susceptibilities of nontarget insects.

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