Gray is a modifier that causes the progressive depigmentation of the colored hairs. Horses born with this modifier are usually born colored but gradually lose pigmentation and can become mostly white in 6-8 years. The vast majority of white horses are in fact horses that have fully grayed out...
The Champagne Dilution gene mutation is responsible for the dilution of black horses to Classic Champagne, bays to Amber Champagne and chestnuts or sorrels to Gold Champagne.
DNA
testing used to determine if a horse is homozygous, heterozygous
or negative for the Tobiano coat pattern.
Genetic
test used to determine a horses base coat color. The test targets
an area of the Extension gene which controls the production
of red and black pigment.
Genetic
testing useful for breeders interested in the frame overo
pattern but wanting to avoid possible production of lethal foals associated
with homozygous positive LWO horses.
The
Agouti gene controls the distribution of black pigment. Genetic
testing is useful for breeders interested in producing or avoiding
bay-based horses.
Sabino1 is a gene mutation
that has been determined to be the cause of a Sabino coat
pattern found in a number of breeds of horses such as Tennessee
Walking Horses, American Paint Horses, American Miniature
Horses, Missouri Foxtrotters and several other breeds.
Cream
Dilution is responsible for the dilution of Chestnut horses
to Palomino and Cremello, Bay horses to Buckskin and Perlino
and Black horses to Smoky Black and Smoky Cream.
Hyperkalemic
Periodic Paralysis Disease is a genetic muscular disease that
can be found in American Quarter Horses and related breeds particularly
those who are descendants of the sire, Impressive. Symptoms
of HYPP may include muscle twitching and unpredictable paralysis
attacks which can lead to sudden death.
The
Silver Dilution gene mutation is responsible for what is commonly
know as the Silver Dapple coat color. When present, black-based
horses will have a chocolate body with flaxen mane and tail.
Bay-based horses will have lightened lower legs and flaxen
mane and tail. Red-based horses are not altered.
Hereditary
Equine Regional Dermal Asthenia (HERDA) also known as Hyperelastosis
Cutis (HC) is a genetic skin disease predominately found in
the American Quarter Horse. Symptoms of this disorder is a lack
of adhesion within the layers of skin due to a genetic defect
in the collagen that holds the skin in place.
Offspring Coat
