The Agouti Gene
Bays, Buckskins and Perlinos
Technically agouti is a modifier gene as it modifies/restricts where black can show on a horse to the points - mane, tail and lower legs. This results in a a bay horse. Add a creme gene you get Buckskin and two you get Perlino.
RESEARCH INFORMATION
Online
Color testing can be performed through Animal Genetics, UC Davis, Veterinary Genetic Services and a few others. The price varies depending on the test. A full panel can run $100, individuals $25-40-60 depending on which color/coat pattern being tested. Tests use pulled mane or tail hair and take usually a few days to a week.
Color Coat Calculator at Animal Genetics Lab.
Horse Coat Color Table at UC Davis
Equine Tapestry - blog about Equine Color Genetics (also a book, link from the blog!)
Books
- Equine Color Genetics - D. Philip Sponenberg, DMV, PhD
- Horse Color Explained - Jeanette Gower
- Horse Genetics - Ann Bowling
- Horse Color - D. Philip Sponenberg, DMV, PhD & Bonnie Beaver