Abstract
Individual biting females were collected from 5 different localities in Africa. Eggs were obtained and F1 progeny were sib-mated. F2 progeny were scored for visible mutations; each mutant isolation was indicative of heterozygosity in the parent generation. A total of 64 females was tested, involving 382 F1 pair matings and examination of 24,000 F2 progeny. There were 34 different kinds of mutations recovered among 142 different isolations. Two populations from the coast of Kenya gave 2.96 and 2.72 mutations per mosquito, carried in the heterozygous condition. Populations from West Africa gave 0.52 (Ghana), 0.72 (Nigeria) and 0.84 (Rep. de Congo). Each population carried a distinctive array of different kinds of mutants. The populations from East Africa were above and those from West Africa were below the value of 1.32 mutations per mosquito obtained in 3 laboratory strains by VandeHey.
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