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1 June 2000 A Genetic Analysis of Cyromazine Resistance in Drosophila melanogaster (Diptera: Drosophilidae)
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Abstract

Flies resistant to the insect growth regulator cyromazine were selected in the F1 generation from a cyromazine-susceptible strain of Drosophila melanogaster (Meigen) treated with ethyl methanesulfonate. Four resistant strains were isolated by screening with cyromazine at a concentration >LC100 of susceptibles. In each strain, resistance is conferred by a single gene mutation. Cyromazine resistance in two of the mutants (rst(1a)cyr1 and rst(1a)cyr2) localizes to map position 17 of the X chromosome. Evidence is presented that these mutations are alleles of the gene rst(1a)cyr. Cyromazine resistance in another of the mutants (Rst(1b)Cyr) is also X-linked, and localizes to map position 49 of the X chromosome. The location of the gene conferring cyromazine resistance in the other mutant (Rst(2b)Cyr) is map position 66 of chromosome II. This is possibly an allele of a previously characterized cyromazine resistance gene, Rst(2)Cyr. Dosage–mortality analyses demonstrate a low level of cyromazine resistance is conferred in all strains.

Phillip J. Daborn, John A. McKenzie, and Philip Batterham "A Genetic Analysis of Cyromazine Resistance in Drosophila melanogaster (Diptera: Drosophilidae)," Journal of Economic Entomology 93(3), 911-919, (1 June 2000). https://doi.org/10.1603/0022-0493-93.3.911
Received: 9 September 1999; Accepted: 1 January 2000; Published: 1 June 2000
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