Evaluating the insecticide resistance potential of eight Drosophila melanogaster cytochrome P450 genes by transgenic over-expression

Abstract

In Drosophila melanogaster, the increased expression of Cyp6g1 results in resistance to chemically unrelated insecticides including DDT, neonicotinoids and insect growth regulator insecticides. To determine the insecticide resistance capacity of other D. melanogaster cytochrome P450s, we used the GAL4/UAS system to express individual P450s in the midgut, Malpighian tubules and fat body of transgenic flies. Drosophila over-expressing Cyp6g1, Cyp6g2, Cyp6t3, Cyp6a2, Cyp6a8, Cyp6a19, Cyp6a23 and Cyp12d1 were screened for resistance to four insecticides-DDT, nitenpyram, dicyclanil and diazinon. Increased survival on insecticides is detected for Cyp6g1 (DDT, nitenpyram and dicyclanil), Cyp6g2 (ni..