The Coadaptive Process in an Organophosphorus-Resistant Strain of the Two-Spotted Spider Mite, Tetranychus urticae12
1968; Oxford University Press; Volume: 61; Issue: 5 Linguagem: Inglês
10.1093/aesa/61.5.1055
ISSN1938-2901
AutoresW. D. McEnroe, John A. Naegele,
Tópico(s)Insect and Pesticide Research
ResumoA now physiological race of Tetranychus urticae Koch evolved from the combined effects of natural and directed selection. The initial rapid shift in response, resulting from directed selection with oxydemetonmethyl, was gradually incorporated into a new modal phenotypc. This coadaptive process, resulting from natural selection, was slower than the response to directed selection. The initial response was negatively correlated with fitness, and as a result, a major genetic reorganization was imposed upon the coadaptive process. However, the new optima was accommodated with the formation of a new modal genotype. The haploid male limited the rate of change of the population.
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