Cyromazine Resistance in Drosophila melanogaster (Diptera: Drosophilidae) Generated by Ethyl Methanesulfonate Mutagenesis

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Abstract:

Flies resistant to cyromazine (CGA-72662) were selected in susceptible laboratory populations of Drosophila melanogaster (Meigen) treated with ethyl methanesulfonate after growth on cyromazine concentrations >LC99. Two resistant lines were obtained. In each case, resistance was a result of a mutation in a single, but different, gene. The resistance genes, designated Rst(2)Cyr and Rst(3)Cyr, were localized to map positions 64 on chromosome II and 47 on chromosome III, respectively. Concentration-mortality analysis of each mutant revealed that both genes conferred a low level <5 times) of resistance to cyromazine. Rst(2)Cyr produced LC99S of 1.3 × 10-4% (wt/vol) for heterozygotes and 2.7 × 10-4% for homozygotes; Rst(3)Cyr values were 1.6 × 10-4 and 1.8 × 10-4%, respectively. These values compare with an LC99 of 5 × 10-5% for wild-type. The role of D. melanogaster as a model for insecticide resistance studies is discussed, especially the comparison of laboratory-generated cyromazine resistance in D. melanogaster with field resistance in Musca domestica L.

Document Type: Research Article

Publication date: August 1, 1993

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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