Open AccessDeltamethrin resistance in the codling moth (Lepidoptera: Tortricidae): inheritance and number of genes involved
Author(s) -
Bouvier JeanCharles,
Buès Robert,
Boivin Thomas,
Boudinhon Liliane,
Beslay Dominique,
Sauphanor Benoît
Publication year - 2001
Publication title -
heredity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.441
H-Index - 118
eISSN - 1365-2540
pISSN - 0018-067X
DOI - 10.1046/j.1365-2540.2001.00928.x
Subject(s) - tortricidae , deltamethrin , biology , codling moth , lepidoptera genitalia , genetics , gene , allele , population , gelechiidae , botany , pesticide , ecology , demography , sociology
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.