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Polygenic control of a mating signal in Drosophila

1996; Springer Nature; Volume: 77; Issue: 4 Linguagem: Inglês

10.1038/hdy.1996.156

1365-2540

Adrian R. G. Pugh, Michael G. Ritchie,

Plant and animal studies

Recent findings show that traits which influence speciation in the melanogaster subgroup of Drosophila can be determined by relatively few loci and/ or be sex-linked. Using backcrosses between D. simulans and D. mauritiana, we show that an acoustic mating signal which plays an important role in courtship (the interpulse interval of the 'lovesong') has a polygenic determination. There is no evidence of single genes of large effect, a disproportionate contribution of the sex chromosome or epistasis. The probability of finding single genes with a large effect on sexual isolation may vary with the mode of signalling involved.