Frequencies of Organophosphate Resistance-Associated Mutations in the Acetylcholinesterase Gene of Field Collected Olive Fly (Bactrocera Oleae) Populations Under Different Insecticide Regimes


In the present study, the frequencies of three organophosphate (OP) resistance-associated mutations in acetylcholinesterase gene of Bactrocera oleae (BoAce) populations collected from 8 different important olivegrowing areas in the west part of Turkey were determined. Populations were sampled from the areas that have been treated with only the pyrethroid α-cypermethrin; pyrethroids plus OPs; deltamethrin with pheromone eco-traps, and no insecticide treatment applied areas for many years. For Ile214Val and Gly488Ser point mutations PCR-RFLP and for Δ3Q deletion mutation PCR diagnostic tests were carried out. Seventy-two percent of the total individuals analyzed in the study were exhibited heterozygous genotype (RS) for both Ile214Val and Gly488Ser point and homozygous susceptible genotype (SS) for Δ3Q deletion mutations. This RS/RS/SS combination together with RS/RR/SS with the frequency of 13% were the most common two combinations observed in all of the populations under different insecticide regimes, even in the populations under no insecticide pressure for many years. Independent evaluation of the three mutations resulted in 0.450, 0.534 and 0.037 frequency values for the resistant alleles of 214Val, 488Ser and Δ3Q mutations, respectively. Among the studied populations, the frequencies of resistant alleles for the positions of 214 and 488 were not differed from each other. However, in 3 of the populations the frequency of the R allele of Δ3Q was zero and it changed between 0.025 and 0.100 in the remaining five populations. Results of this study contributed to the distribution pattern of the two point mutations in Europe and a pattern for Δ3Q mutation was determined for the first time in the field collected olive fly samples.

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Correspondence to Belgin Göçmen Taşkin.

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Başkurt, S., Doğaç, E., Taşkin, V. et al. Frequencies of Organophosphate Resistance-Associated Mutations in the Acetylcholinesterase Gene of Field Collected Olive Fly (Bactrocera Oleae) Populations Under Different Insecticide Regimes. BIOLOGIA FUTURA 62, 22–33 (2011).

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  • Acethylcholinesterase
  • Bactrocera oleae
  • insecticide resistance
  • resistance mutations