Dun (D) is a dilution gene, much like cream and champagne. Dun horses will have lighter bodies, with their true coat color showing through on the legs, face, and markings.
Dun horses can have dozens of different types of markings, the most well known is the shoulder stripe and leg barring. There are some types of dun markings that a horse must have to be categorized as dun. These required markings include; dark points on the legs, face mask, and a dorsal stripe.
Other primitive markings include cobwebbing, ear bars, eye spots, neck shadow, shoulder stripe, mottling, ventral stripe, dorsal fishboning, leg bars, and mane/tail frosting.
Dun horses can have dozens of different types of markings, the most well known is the shoulder stripe and leg barring. There are some types of dun markings that a horse must have to be categorized as dun. These required markings include; dark points on the legs, face mask, and a dorsal stripe.
Other primitive markings include cobwebbing, ear bars, eye spots, neck shadow, shoulder stripe, mottling, ventral stripe, dorsal fishboning, leg bars, and mane/tail frosting.
Genes that are in bold are active on the coat. Genes that are underlined are genes that the horse may carry, but will have no visible effect on the coat.
Gene Sequence
ee · aa · gg · crcr · D_ · chch · F_ · zz · stysty · rbrb · rn+rn+ · sb1+sb1+ · w+w+ · to+to+ · oo · splspl · lplp · patn1patn1 · patn2patn2
Gene Sequence
ee · aa · gg · crcr · D_ · chch · F_ · zz · stysty · rbrb · rn+rn+ · sb1+sb1+ · w+w+ · to+to+ · oo · splspl · lplp · patn1patn1 · patn2patn2