Haplotype comparison in the CW-2 region. The alleles shared among two or three Q haplotypes are colored light grey or grey, respectively. The alleles homozygous in a sire are shown in italics. The regions homozygous for more than two consecutive markers are boxed. (A) Haplotypes between 38 and 55 cM. Locations of the microsatellite markers in the BAC fingerprint map are shown . (B) Haplotypes around the critical 591-kb region. (C) Genes located in the 591-kb region. Exons are indicated by the vertical lines. Each arrow shows the location and direction of a transcript.