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Splashed white 1/deafness (SW1)


Splashed white markings typically appear to be splashed up from underneath the horse. They can range from minor facial markings and socks to the white face, blue eyes, white legs and white belly of a typical boldly marked splash horse. Some, but not all splashed white horses are deaf.

Chestnut splashed white horses generally have larger markings than bay/brown or black splashed white horses.

Depending on the amount of white, splashed white can be indistinguishable from sabino 1 or frame overo markings. Testing is the fastest and most cost effective way to get a definitive answer on your horse.

The SW1 version of splashed white is present in a wide range of horse breeds.

Gene or region and technical reference

Gene: MITF (causative). Reference: Hauswirth et al. (2012)

Reported alleles

n. Test developed using animal controls.

SW1. Test developed using animal carriers.

Order tests

There is a one-off sample processing fee of $40 per animal plus the cost of your tests.

How many animals are you testing? Discount or society code:


$33 DNA profile ... more

Good looks

Coat colour

$9 Agouti (bay factor) ... more

$9 Red/black ... more

Coat pattern

$9 Frame overo/lethal white syndrome (OLWS) ... more

$9 Grey/melanoma ... more

$9 Lp/Appaloosa/night blindness (CSNB) ... more

$9 PATN1 coat pattern modifier (PATN1) ... more

$9 Roan marker ... more

$9 Sabino 1 ... more

$9 Splashed white 1/deafness (SW1)

$9 Splashed white 2/deafness (SW2) ... more

$9 Splashed white 3/deafness (SW3) ... more

$9 Tobiano ... more

$9 W13 dominant white (W13) ... more

$9 W20 white markings (W20) ... more

$9 W22 dominant white (W22) ... more

$9 W25 dominant white (W25) ... more

$9 W26 dominant white (W26) ... more

$9 W27 dominant white (W27) ... more

Colour dilution

$9 Champagne ... more

$9 Cream ... more

$9 Dun and d1 (nd1) ... more

$9 Pearl ... more

$9 Silver/eye abnormalities (MCOA) ... more

Good health

Paint horses

$9 Splashed white 2/deafness (SW2) ... more

$9 Splashed white 3/deafness (SW3) ... more

Pure- and part-bred Akhal-Tekes

$14 Naked foal syndrome (NFS) ... more

Good health

Multiple breeds

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

$14 Fragile foal syndrome (FFS) ... more

$9 Frame overo/lethal white syndrome (OLWS) ... more

$9 Grey/melanoma ... more

$9 Lp/Appaloosa/night blindness (CSNB) ... more

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

$9 Silver/eye abnormalities (MCOA) ... more

$9 Splashed white 1/deafness (SW1)

Pure- and part-bred Arabians

$14 Cerebellar abiotrophy (CA) ... more

$14 Lavender foal syndrome (LFS) ... more

$14 Occipitoatlantoaxial malformation (OAAM) ... more

$14 Severe combined immune deficiency (SCID) ... more

Pure- and part-bred Connemaras

$14 Hoof wall separation disease (HWSD) ... more

Pure- and part-bred Friesians

$14 Friesian dwarfism ... more

$14 Hydrocephalus ... more

Pure- and part-bred Miniature horses

$14 D1 form of Miniature dwarfism (D1) ... more

$14 D2 form of Miniature dwarfism (D2) ... more

$14 D3 form of Miniature dwarfism (D3) ... more

$14 D4 form of Miniature dwarfism (D4) ... more

$140 Skeletal atavism (SA) ... more

Pure- and part-bred Quarter Horses and Paints

$14 Glycogen branching enzyme deficiency (GBED) ... more

$14 Hereditary equine regional dermal asthenia (HERDA) ... more

$14 Hyperkalaemic periodic paralysis (HYPP) ... more

$14 Malignant hyperthermia (MH) ... more

Pure- and part-bred Saddlebreds

$14 Junctional epidermolysis bullosa (JEB2) ... more

Good moves

Gaited horses

$9 Lateral gait marker ... more

Tests can be in the list more than once when the gene in question has more than one effect. It is OK to select the same test once or more than once, the price is the same.