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2012年49 No.5
Effects of Bt-cry1Ah corn pollen on larvae of Apis mellifera ligustica
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Key Words：honeybee，larvae，transgenic corn，cry1Ah gene，pollen
Abstract：The cry1Ah gene，which displays high toxicity against Lepidopteran larvae，was one of the novel insecticidal
genes cloned from Bacillus thuringiensis isolate BT8． Cry1Ah protein have higher toxicity to the Asian corn borer (Ostrinia
furnacalis(Guenée) ) than any other cry1A genes． The cry1Ah gene was therefore a candidate gene for insect resistant
transgenic corn research． Pollen is a significant component of the diet of honeybees． Thus the honeybee may serve as one
of the key species to be tested for the potential adverse effects of transgenic crops and assessment of impacts on honeybees
is an essential part of the risk assessment process for Bt cry1Ah gene corn． The effects of dietary transgenic Bt corn pollen
on honeybee worker larvae of Apis mellifera ligustica Spinola was examined． We measured cap rate，emergence rate，and
immature stage after 4-6-day-old larvae were fed either cry1Ah corn pollen，regular corn pollen，mixed bee pollen and a
control． There were no significant differences in all the parameters measured between bees fed these diets． These results
suggest that transgenic Bt corn pollen does not pose a threat to honeybee larval development．