Abstract
Resistance at the diazinon-resistance locus (Rop-1) is recessive with respect to fitness. Selection initially occurs at concentrations lower than those required to controlLucilia cuprina. The presence of theRop-1 allele initially disrupted development so that in the absence of diazinon, carriers were at a relative selective disadvantage. Continued use of the chemical, subsequent to resistance evolving, selected a modifier to ameliorate this effect. Modified resistant phenotypes show similar developmental stability and relative fitness to susceptible individuals. Frequency-dependent interactions are observed between resistant and susceptible phenotypes of theRop-1 locus. The interactions are determined by the concentration of diazinon and range from competitive to facilitative. The results are discussed in the context of the contribution insecticide resistance systems can make to the study of general evolutionary phenomena.
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McKenzie, J.A. Measuring fitness and intergenic interactions: The evolution of resistance to diazinon inLucilia cuprina . Genetica 90, 227–237 (1993). https://doi.org/10.1007/BF01435042
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DOI: https://doi.org/10.1007/BF01435042