Sexual competitiveness of males of the Mediterranean fruitfly, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), carrying a Y-chromosome translocation

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Abstract
The sexual competitiveness of males of Ceratitis capitata (Wied.) carrying a chromosomal translocation and a morphological mutation was compared to that of a wild-type strain. The competitiveness was evaluated by calculating from progeny data the proportion of females that mated with each male type. Males were introduced into the test population in varying proportions. The chromosomal translocation did not affect the competitiveness of the males. The presence of an eye-colour mutation (apricot) reduced the sexual competitiveness of the males bearing the translocation. The results showed evidence for a minority effect (an inverse relation between genotype frequency and mating success). The genetic background of the females in the test populations influenced the competitiveness of the participating males.
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