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- Title
Deltamethrin resistance in the codling moth (Lepidoptera: Tortricidae): inheritance and number of genes involved.
- Authors
Bouvier, J C; Buès, R; Boivin, T; Boudinhon, L; Beslay, D; Sauphanor, B
- Abstract
The inheritance of deltamethrin resistance in Cydia pomonella (L.) has been investigated by crossing a resistant (Rv) and a susceptible (Sv) strain, derived from a population collected in south-eastern France in 1995. Deltamethrin resistance was suspected to be under the control of a kdr-type allele and an enhanced mixed-function oxidase (mfo). F(1) and F(2) progenies were therefore tested through dose-response and enzyme assays. Dose-response relationships indicated that resistance was inherited as an autosomal incompletely recessive (D=-0.199) character, involving at least two genes. Enzyme measures suggested the contribution of 1.2 genes to the expression of mfo, with incomplete dominance (D=0.460). Our results support the hypothesis of a polygenic response to deltamethrin selection in the Rv strain, including a major kdr-type allele with a minor effect of mfos. In the light of these findings, we consider the resistance in codling moth populations in south-eastern France as a product of an adaptive sequential selection process, occurring through the sequential addition of resistance genes.
- Publication
Heredity, 2001, Vol 87, Issue Pt 4, p456
- ISSN
0018-067X
- Publication type
Journal Article
- DOI
10.1046/j.1365-2540.2001.00928.x