Location of an x-linked factor causing sterility in male hybrids of drosophila simula ns and D.Mauritiana

Abstract

We report the first mapping of a genetic factor responsible for reproductive isolation: a small segment of genome strongly affecting sperm motility in hybrids between the sibling species Drosophila simulans and D. mauritiana. Maximum-likelihood analysis of data from ten generations of backcrossing places this factor at 1·1 ± 0·2 map units from the forked locus, at position 54·9 ± 0·2 or 57·1 ± 0·2 on the X chromosome. © 1986 The Genetical Society of Great Britain.