Color: Amber is a phenomenon in the Norwegian Forest Cat that causes a cat’s hair to brighten during maturation.
Samples Accepted: Blood, Buccal Swabs
Locus Information: E
The Extension locus codes for red in all mammals, and in the cat, only the Norwegian Forest Cat has been found to have a mutation in this gene. It causes a lightening of the base color in both solid and tabby cats. This mutation is not related to orange.
Test Information: This mutation test identifies a single base pair change in MC1R gene.
Peterschmitt, M., Grain, F., Arnaud, B., Deléage, G., Lambert, V.: Mutation in the melanocortin 1 receptor is associated with amber colour in the Norwegian Forest Cat. Anim Genet 40:547-52, 2009. Pubmed reference: 19422360. Doi: 10.1111/j.1365-2052.2009.01864.x.
Further information is available at the Online Mendelian Inheritance in Animals website.