Smoky dun

Appearance

Foals		Smoky dun foals look the same as black dun foals. They have a mousy greyish coat color and primitive markings.

Foals

Smoky dun foals look the same as

black dun foals. They have a mousy

greyish coat color and primitive markings.

Like black dun, smoky dun dilutes a black base coat to a blueish grey color with primitive markings.		Adults

Like black dun, smoky dun dilutes

a black base coat to a blueish grey

color with primitive markings.

Adults

Smoky dun looks basically identical to black dun, so genetic testing (or pedigree) is needed to tell the difference.

Smoky dun is the result of a black base diluted by one copy of cream and one copy of dun.

The cream (CR) dilution is an allele of the MATP gene. The dun (D) dilution is an allele of the TBX3 gene.

Smoky Dun:
Black (E/_) + CR/n + D/_

Although one copy of cream has no visible effect on a black coat, the allele can, of course, still be passed on to offspring.

Read more:
Black | Smoky black | Black dun | Dunalino | Dunskin

Imsland, F., McGowan, K., Rubin, C. J., Henegar, C., Sundstrom, E., Berglund, J., Schwochow, D., Gustafson, U., Imsland, P., Lindblad-Toh, K., Lindgren, G., Mikko, S., Millon, L., Wade, C., Schubert, M., Orlando, L., Penedo, M. C., Barsh, G. S., & Andersson, L.; Regulatory mutations in TBX3 disrupt asymmetric hair pigmentation that underlies Dun camouflage color in horses; Nature Genetics (2015); Doi: 10.1038/ng.3475
Locke, M. M., Ruth, L. S., Millon, L .V., Penedo, M. C. T., Murray, J. D., & Bowling, A. T.; The cream dilution gene, responsible for the palomino and buckskin coat colours, maps to horse chromosome 21. Animal Genetics (2001); doi: 10.1046/j.1365-2052.2001.00806.x
Mariat, D., Taourit, S., & Guérin, G.; A mutation in the MATP gene causes the cream coat colour in the horse. Genetics Selection Evolution (2003); doi: 10.1051/gse:2002039