Dominance of Insecticide Resistance Presents a Plastic Response

AUTOR(ES)

Bourguet, D.

RESUMO

Dominance level of insecticide resistance provided by one major gene (an insensitive acetylcholinesterase) in the mosquito Culex pipiens was studied in two distinct environments. Dominance level was found to be very different between environments, varying from almost complete dominance to almost recessive when either propoxur (a carbamate insecticide) or chlorpyrifos (an organophosphorus insecticide) was used. To better understand this plastic response, three environmental parameters were manipulated and their interactions studied. For chlorpyrifos, each parameter had a small effect, but when all parameters were changed, the dominance level was greatly affected. For propoxur, one environmental parameter had a large effect by itself. It was further studied to understand the causal relationship of this plasticity. Recessivity of resistance was associated with more demanding environments. These results are discussed in the context of the various theories of the evolution of dominance. It appears that dominance of insecticide resistance cannot be directly predicted by Wright's physiological theory.

Documentos Relacionados

• The genomics of insecticide resistance
• History of insecticide resistance of Triatominae vectors
• Mathematical modelling of vector-borne diseases and insecticide resistance evolution
• Resistance-associated point mutations in insecticide-insensitive acetylcholinesterase.
• Insecticide resistance resulting from an absence of target-site gene product