Insecticide resistance genes in mosquitoes: their mutations, migration, and selection in field populations
Article Abstract:
The mutations that result in insecticide resistance in various species of insects are rare and perhaps unique events which later are distributed in the population due to migration of the insects and natural selection. The resistance mechanism is either a mutation in the insecticide target protein or increased detoxification. Mutation in the target protein reduces its affinity towards the insecticide. The wide distribution of these mutations in the population is due to active or passive migrations. In absence of selection pressure, the resistant insects are less fit than the wild type.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1996
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Molecular mapping of insecticide resistance genes in the yellow fever mosquito (Aedes aegypti)
Article Abstract:
Restriction fragments of the Aedes aegypti chromosomes were analyzed using molecular probes directed at three insecticide resistance genes to determine their position in the genome. The positions of the gene for the resistance to dieldrin, Rdl, and the gene for the sodium channel, para, are both correlated with the locations of the cyclodiene and the DDT and pyrethroid resistance loci. Resistance to organophosphate as well as carbamate insecticides is controlled by the Ace gene located near the sex-determining locus.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1997
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Linkage analysis of insecticide-resistant acetylcholinesterase in Heliothis virescens
Article Abstract:
Aceln, an autosomal locus controlling acetylcholinesterase (ACHe) insensitivity in Heliothis virescens, was characterized and mapped to linkage group 2. The translocation of this autosome to the sex chromosome in many species of the family Totricidae indicated that organophosphorus resistance of tortricids due to target-site insensitivity may be sex-linked. Mechanisms of resistance were studied indicating that target-site modification is not involved in the detection of ACHe from resistant and susceptible insects.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1998
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