Base coat colours
Coat colour dilutions
Genetic disorder tests
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.