Breeding for Dilute Colors, continued ...
A true palomino has one cremello allele and is homozygous
chestnut (sorrel). The Palomino Horse Breeders of America, Inc.
(PHBA) registers palominos of several breeds. They must have
a body coat color close to that of fourteen-karat gold, and a
white mane and tail (no more than 15% other colored hairs). By
contrast, the Palomino Horse Association (PHA) registers both
palominos and cremellos. This provides an advantage to breeders.
Here is why.
If you breed one palomino to another, on the average, half
of their offspring will be palominos, one quarter sorrels, and
one quarter cremellos. A palomino bred to a sorrel has a 50%
chance of throwing a palomino and 50% chance of a sorrel. On
the other hand, if you breed a cream-colored horse that is both
homozygous chestnut and cremello to a sorrel, you will always
get a palomino. This is the only way to 100% guarantee that your
foal will be a palomino.
The problem is, you cannot tell whether a cream-colored horse
is homozygous cremello just by looking. For example, a horse
that combines one cremello allele with a champagne or silver
dapple allele can look like a cremello.
A silver dapple or champagne horse can also appear to be a
palomino without having a cremello allele. A horse with the silver
dapple allele can look like a sorrel, but carry bay alleles.
If you breed these false sorrels or palominos, they can throw
Genetic tests for homozygous cremello and chestnut alleles
can guarantee 100% success at palomino breeding.
Palomino Horse Breeders of America
15253 E. Skelly Drive,
Tulsa, Oklahoma 74116-2637
Palomino Horse Association
HC 63. Box 24, Dornsife, PA 17823.
Telephone (570) 758-3067
Fax (570) 758-5336