Agouti, the bay factor

Why test for agouti?

Most horses are chestnut, black or bay/brown*. Many other unusual coat colours come about when these basic colours are modified. Just two genes control these basic coat colours.

Agouti (ASIP) is the bay factor gene, which can restrict black pigment to the points. If your horse is chestnut or a colour based on chestnut such as palomino, you will need to use genetic testing to find out which versions of this gene your horse has inherited. If your horse is bay or a colour based on bay such as buckskin or bay silver, you will need to use genetic testign to find out how many copies of this gene your horse has inherited.

Genetic testing for these genes lets you predict and advertise what colour foals your horse or pony might produce. Read more about chestnut, black and bay/brown and ask questions here...

* We do not have a genetic test for the difference between bay and brown... yet.

Bay horses

Purchase equine DNA testing

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

How many horses do you want to test?

Discount code:

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

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 SW3 (Splashed White 3) ...read more
$9 Frame overo (OLWS) ...read more
$9 Tobiano ...read more
$9 Sabino 1 ...read more
$9 W13 dominant white (Miniatures) ...read more
$9 W20 white markings ...read more
$9 W22 dominant white (TB, Paint) ...read more
$9 W25 dominant white (TB) ...read more
$9 W26 dominant white (TB) ...read more
$9 W27 dominant white (TB, Paint) ...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

Warmbloods and related breeds

$14 Fragile foal syndrome (FFS) ...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
$14 Glycogen branching enzyme deficiency (GBED) ...read more

Saddlebred horses and related breeds

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

Pure and part-bred Akhal Teke

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

Pure and part-bred Connemara

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

Parentage/DNA profile

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

Remember: most breed societies ask members to test through their society.

Parentage verification: