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Inheritance of resistance to dieldrin in Anopheles albimanus Wiedemann



Inheritance of resistance to dieldrin in Anopheles albimanus Wiedemann



American Journal of Tropical Medicine and Hygiene 10: 775-781



Anopheles albimanus had developed resistance to dieldrin in several localities in Central America. A resistant strain from El Salvador was established as a laboratory colony. A susceptible colony of this species has been maintained at the Gorgas Memorial Laboratory in Panama since 1937 These populations, as well as various hybrid F1, F2, and backcross populations were tested for resistance to dieldrin by exposing 2-3 day old, sugar fed adults to the World Health Organization dieldrin-impregnated test papers. The mosquitoes were exposed to the dieldrin deposits for 2 hours, and mortalities were determined after a 24 hour recovery period. At 0.4 and 0.8% dieldrin concentrations, the mortalities of the Panama and El Salvador populations were about 5 and 98%, respectively, while those of the F1 hybrids were comparable to those of the resistant El Salvador parents. Mortalities of the F2 and backcross populations in general agreed with those expected on the basis of monofactorial inheritance. Results obtained with males and females were comparable, although males showed slightly higher mortalities. It is concluded that in these populations, the ability to survive contact with dieldrin on the part of 2- to 3- day old, sugar fed adult males and females is inherited as a simple factor, with resistance completely dominant over susceptibility.

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Accession: 014082422

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PMID: 13744250


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