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Horse DNA testing illustration

Coat Colour White Spotting – W20

Code: P592

74,72 €

Sample details

One test – one sample. Animal and owner details are optional.

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Short description

The Dominant White coat colour pattern in horses can be caused by any in a wide array of related mutations.

General information

The Dominant White coat colour pattern in horses can be caused by any in a wide array of related mutations. The resulting pattern can vary anywhere between white markings on the face and legs, up to a completely white coat. Depending on both breed and pattern, variants of the Dominant White phenotype may be referred to as Splashed White, White Spotting, Tobiano or Sabino, among others.

The specific variant analysed in this test, known as Dominant White 20 (W20), is caused by an incomplete dominant mutation to the gene KIT. It has been observed in a wide variety of horse breeds.

Specifications

Breeds

American Quarter Horse, Gypsy Vanner, Irish Cob, Oldenburg, American Paint Horse, Appaloosa, German Riding Pony, Noriker, Old-Tori, Thoroughbred, Tinker, Warmblood, Welsh Pony
Gene

KIT
Chromosome

3
Mutation

c.2045G>A
Organ

Integumentary System
Specimen

Hair, Blood EDTA, Blood Heparin, Semen, Tissue
Mode of Inheritance

Autosomal Incomplete Dominant

Clinical features

Dominant White patterns are variable, ranging from minimal Sabino-like spotting to all-white horses. The eye colour of Dominant White horses is brown. One or two copies of the W20 allele have a subtle effect on the amount of white expressed. It appears to increase the expression of white in combination with other white pattern genes.

Additional information

Coat colour is an intricate trait that involves a combination of multiple different genes. Testing for a range of different loci will give the most complete prediction of a horse's coat colour genetics.

Dominant White can be caused by a wide range of mutations. A white-patterned horse that tests as unaffected for a particular mutation will almost certainly be affected by a different one.

References

Pubmed ID: 23659293

Year published: 2013

Omia ID: 209

Omia variant ID:

Turnaround information

  • 15 working days