Genetic map of region of proximal Chr.16 containing md. Map is based on 149 progeny of a B6.C3H-md-A md/md, A/? × B6.C3H-md-A md/+, A/? cross. The congenic C3H/HeJ interval is indicated. Genotype at md is inferred by coat color. The md/md A/? animals are umbrous (mahoganoid), and md/+ A/? are agouti. cM, centiMorgans.