Abstract
Abstract A dominant mutation, Sergeant (Sr2), which affects expression of a third stripe on the abdomen of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann), was recently isolated and the results of an extended genetic analysis are reported here. In addition, field cage data are presented on the mating competitiveness of strains carrying this mutation, including a genetic sexing strain (GSS). The incorporation of a phenotypic marker, such as Sr2, in a Mediterranean fruit fly GSS would complement, and could replace, the use of fluorescent dye for monitoring sterile insect technique programs and increase program efficiency by improving sterile and wild fly identification procedures. The mutation is homozygous lethal, and it is located on chromosome 5 at position 78B and 60D on the salivary and trichogen polytene maps, respectively. The development of the Sr2 GSS is described here, together with data on fitness and penetrance of the mutation. The field-cage results demonstrated 1) random mating bet...
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