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The Journal of Heredity 1985:76(3):224-225
© 1985 The American Genetic Association 76:224-225

other

Inheritance of the harlequin color in Great Dane dogs

D. Phillip Sponenberg

The author is assistant professor at the Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg VA 24061. The provision of these data by breeders of Great Dane dogs is gratefully acknowledged.

Abstract

The harlequin color pattern of Great Dane dogs differs from merle in that the background is white instead of blue. Harlequin by harlequin matings produced 60 black, 77 harlequin, 42 merle, and 35 homozygous merle pups. Harlequin by black matings produced 44 black, 26 harlequin, 25 merle, and one white (homozygous merle?) pups. All harlequins produced some merles. These data best fit the hypothesis that harlequin is a modification of merle (Mm) caused by an autosomal dominant mutation that is lethal to homozygotes, and to about half of heterozygotes when combined with the MM genotype. The symbol H is proposed for this mutation.


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