Esterases in the malaria vector mosquito, Anopheles cuilcifacies

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Abstract
The genetic and linkage analyses of an α and β esterase polymorphism in Anopheles cullicifacles are presented. A survey of laboratory strains uncovered four electrophoretic variants for the alpha esterase and two for the beta esterase. Genetic analyses indicated that the variants of the alpha esterase are under the control of codominant alleles of a single locus and that this locus is linked to the locus controlling the expression of the codominant alleles of the beta esterases. The esterases are not linked either to sex (chromosome 1) or to maroon eye (chromosome 2) but to the chromosome 3 markers, dieldrin resistance and phosphoglucomutase. The gene sequence is Est-α—DI—Pgm—Est-β and the recombination frequencies are as follows: Est-α—DI = 2.9 percent; DI—Pgm = 5.8 percent; Pgm—Est-β = 6.4 percent; Est-α—Est-β = 15.1 percent, Est-α—Pgm = 8.7 percent and DI—Est-β = 12.2 percent.