The biochemical genetics of permethrin resistance in the Learn-PyR strain of house fly (original) (raw)

Abstract

Permethrin resistance in the Learn-PyR strain of house fly was examined in four genetically derived substrains, each being homozygous for a different “resistant” autosome of the Learn-PyR strain. The resistance of these derivative strains was characterized toxicologically and biochemically. The relative levels of resistance to permethrin conferred by each autosome were 5>3>1>2. Three factors were associated with resistance: (1) increased mixed-function oxidase (MFO) activity associated with elevated levels of cytochrome P-450, cytochrome b5, and NADPH-cytochrome c reductase (P-450 reductase) activity; (2) target-site insensitivity (kdr); and (3) decreased cuticular penetration. Permethrin resistance factors on chromosome 1 consisted of a piperonyl butoxide (PB)-suppressible mechanism correlated with increased levels of cytochromes P-450 and b5; on chromosome 2, a PB-suppressible mechanism associated with elevated amounts of cytochrome P-450; on chromosome 3, decreased cuticular penetration, kdr, and increased amounts of P-450 reductase activity; and on chromosome 5, a largely PB-suppressible mechanism correlated with elevated levels of cytochrome P-450 and P-450 reductase activity.

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  1. J. G. Scott
    Present address: Pesticide Chemistry and Toxicology Laboratory, Department of Entomological Sciences, University of California, 94720, Berkeley, California

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  1. Division of Toxicology and Physiology, Department of Entomology, University of California, 92521, Riverside, California
    J. G. Scott & G. P. Georghiou

Authors

  1. J. G. Scott
  2. G. P. Georghiou

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Scott, J.G., Georghiou, G.P. The biochemical genetics of permethrin resistance in the Learn-PyR strain of house fly.Biochem Genet 24, 25–37 (1986). https://doi.org/10.1007/BF00502976

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