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

Coat colour tests

Base coat colours

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

Coat colour dilutions

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

Coat patterns

$9 Grey more
$9 Appaloosa or leopard (CSNB) more
$9 PATN1 more
$9 SW1 (Splashed White 1) more
$9 SW2 (Splashed White 2) more
$9 Frame overo (OLWS) more
$9 Tobiano more
$9 Sabino 1 more
$9 W13 dominant white (Miniatures) more
$9 W20 white markings more
$9 W25 dominant white (TB) more
$9 W26 dominant white (TB) more
$9 W27 dominant white (TB, Paint) more
$9 Roan marker more

Inherited disorders

Pure and part-bred Arabian

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

Fell Ponies, Dale Ponies and Gypsy horses

$14 Foal immunodeficiency syndrome (FIS) more

Pure and part-bred Friesian

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

Various breeds

$14 Polysaccharide storage myopathy type 1 (PSSM1) more

Quarter horses and related breeds

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

Saddlebred horses and related breeds

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

Parentage/DNA profile

$33 DNA profile (microsatellite) more

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

Parentage verification:

How many horses do you want to test?

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