The Dun gene acts on the base color, adding the characteristic dark dorsal stripe. In some cases it lightens the body tone and may also produce zebra-like leg markings. This coat is based on Palomino.
Typical Genetic Formula
e/e Cr/n D/n
Possible Genotype Variations
e/e A/A Cr/n D/n
e/e A/A Cr/n D/D
e/e A/a Cr/n D/n
e/e A/a Cr/n D/D
e/e a/a Cr/n D/n
e/e a/a Cr/n D/D
The Genetic Basis
For a horse to be born Dun Palomino, it must receive the following combination from its parents:
- To have the red base (Chestnut), this animal necessarily inherited a recessive (e) allele from the sire and another from the dam. Both parents carried the red factor.
- Its diluted color (golden/cream) results from different genes meeting: it received the dilution gene (Cr) from only one parent.
- The dark dorsal stripe and primitive markings came from at least one parent (D).
Understanding the Alleles
The horse Dun Palomino has a specific combination of alleles. Below, we explain each genetic component that forms this coat:
- e/e (Red Factor): The animal has a fundamentally red base (Chestnut), due to the total absence of black pigment.
- A/ (Agouti): The Agouti gene, when active (with E present), restricts black pigment to the extremities. Carried with no visual effect in e/e animals.
- a/a (Non-Agouti): Allows black to spread over the entire body when combined with E. In e/e animals it is invisible but still passed on.
- Cr/n (Cream): Single dilution of the Cream gene. Lightens red tones to golden.
- D/ (Dun): Adds primitive markings (dorsal stripe) and may slightly lighten the base color.
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