W20

More about W20

W20 is a version of the KIT gene that is thought to cause relatively subtle white markings such as a blaze and socks - and sometimes even less white. It has a white-increasing effect when it is inherited in combination with other white marking genes (article abstract here). Our understanding of what to expect from W20 will increase as we do more testing.

W20 has been found in a very wide range of horse breeds. The following are just some of the horse and pony breeds where some individuals have tested positive to W20: Thoroughbreds, Welsh Ponies, Quarter Horses, Appaloosas, Warmbloods, Gypsy Vanner, Noriker, Miniature Horses... the list goes on.

If your horse has a blaze and one or more socks, or perhaps a few white belly spots that have not been explained by other white marking genes, test for W20 as well as sabino 1.

W20

Fred, a Warmblood, is homozygous for W20. He has four socks, a blaze, a belly splash and birdcatcher spots.

Purchase equine DNA testing

Price per horse = sample processing ($40) + tests

Coat colour tests

Base coat colours

$9 Agouti (the bay factor) ...read more
$9 Extension (red/black) ...read more

Coat colour dilutions

$9 Cream ...read more
$9 Dun and d1 ...read more
$9 Silver ...read more
$9 Champagne ...read more
$9 Pearl ...read more

Coat patterns

$9 Grey ...read more
$9 Appaloosa or leopard (CSNB) ...read more
$9 PATN1 ...read more
$9 SW1 (Splashed White 1) ...read more
$9 SW2 (Splashed White 2) ...read more
$9 Frame overo (OLWS) ...read more
$9 Tobiano ...read more
$9 Sabino 1 ...read more
$9 W13 dominant white ...read more
$9 W20 white markings ...read more
$9 Roan marker ...read more

Inherited disorders

Pure and part-bred Arabian

$14 Cerebellar abiotrophy (CA) ...read more
$14 Severe combined immune deficiency (SCID) ...read more
$14 Lavender foal syndrome (LFS) ...read more

Fell Ponies, Dale Ponies and Gypsy horses

$14 Foal immunodeficiency syndrome (FIS) ...read more

Pure and part-bred Friesian

$19 Friesian dwarfism ...read more
$14 Hydrocephalus (Friesian and other breeds) ...read more

Various breeds

$14 Polysaccharide storage myopathy type 1 (PSSM1) ...read more

Quarter horses and related breeds

$14 Malignant hyperthermia (MH) ...read more
$14 Hyperkalemic periodic paralysis (HYPP) ...read more
$14 Hereditary equine regional dermal asthenia (HERDA) ...read more
$19 Glycogen branching enzyme deficiency (GBED) ...read more

Saddlebred horses and related breeds

$14 Junctional epidermolysis bullosa, Saddlebred form (JEB) ...read more

Parentage/DNA profile

$33 DNA profile (microsatellite) ...read more

Please check with your breed society before
testing for registration; some organise
their own parentage testing.
This order includes:
Samples from offspring and both parents
Samples from offspring and one parent
Offspring sample, parent profile certificates
Offspring sample; parents on file
One sample; no parentage verification

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Need different tests for each horse? You can customise your choices for each horse on next page.