Inheritance Pattern of Temephos Resistance, an Organophosphate Insecticide, in Aedes aegypti (L.)

The present paper reports the mode of inheritance of resistance in laboratory induced temephos resistant and susceptible strains of Ae. aegypti. Homozygous resistant and susceptible strains of Ae. aegypti were generated by selective inbreeding at a diagnostic dose of 0.02 mg/L of temephos. Genetic c...

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Bibliographic Details
Published in:Genetics Research International 2015-01, Vol.2015, p.3-8
Main Authors: Shetty, Vinaya, Sanil, Deepak, Shetty, N. J.
Format: Article
Language:English
Subjects:
Aedes aegypti
Bioassays
Data analysis
Dengue fever
Dosage
Drinking water
Genetic crosses
Heredity
Inbreeding
Inheritances
Insecticide resistance
Insecticides
Laboratories
Mortality
Mosquitoes
Organophosphates
Organophosphorus compounds
Physiological aspects
Studies
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Summary:The present paper reports the mode of inheritance of resistance in laboratory induced temephos resistant and susceptible strains of Ae. aegypti. Homozygous resistant and susceptible strains of Ae. aegypti were generated by selective inbreeding at a diagnostic dose of 0.02 mg/L of temephos. Genetic crosses were carried out between these strains to determine the inheritance pattern of temephos resistance. The log-dosage probit mortality relationships and degree of dominance (D) were calculated. The dosage-mortality (d-m) line of the F 1 generation was nearer to the resistant parent than the susceptible one. The “D” value was calculated as 0.15 indicating that the temephos resistant gene is incompletely dominant. The d-m lines of the F 2 generation and progeny from the backcross exhibited clear plateaus of mortality across a range of doses indicating that temephos resistance is controlled by a single gene. Comparison of the mortality data with the theoretical expectations using the χ 2 test revealed no significant difference, confirming a monogenic pattern of inheritance. In conclusion, the study provides evidence that the temephos resistance in Ae. aegypti follows an incompletely dominant and monogenic mode of inheritance.
ISSN:2090-3154
2090-3162
2090-3162
DOI:10.1155/2015/181872