Evaluates "patterns of introgression across the hybrid zone for 13 diagnostic X-linked loci with known chromosomal positions using a maximum likelihood model". Finds different patterns. Correlates cline width and cline center at different loci.
M. Aguade, N. Miyashita, and C. Langley. Genetics, 122 (3):
607-615(July 1989)"In particular, the low genetic diversity seen in regions of low recombination in Drosophila and other organisms (Aguade et al. 1989; Aquadro et al. 1994) must be due to some kind of selection.".