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Coat colour in dogs is controlled by a wide range of different genes working together.
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Caractéristiques
Breeds | Bouledogue Français, Chien thaïlandais à crête dorsale, Lévrier arabe, Beagle, Chow Chow, Papillon, Staffordshire Bull Terrier |
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Gene | |
Organ | |
specimen | Swab, Blood EDTA, Blood Heparin, Semen, Tissue |
Mode of Inheritance | |
Chromosome | |
Also known as | |
Year Published |
Informations générales
Coat colour in dogs is controlled by a wide range of different genes working together. These genes are often referred to as ‘loci’. The Dilution, or D-Locus, corresponds to the gene for melanophilin, MLPH, which is involved in the distribution of pigment. Mutations of the D-Locus result in a ‘dilution’ of dark coat colours, turning them lighter and more silvery.
Any combination of two mutant alleles will result in a diluted coat. This variant of the D-Locus mutation, designated as d^2, is found in dogs such as the Chow Chow, Sloughi and Thai Ridgeback.
Caractéristiques cliniques
La couleur des cheveux et du nez est diluée, la couleur des yeux s’éclaircit en ambre. L’allèle D est dominant et n’a pas d’effet sur la couleur du pelage. Ce n’est que chez les chiens avec deux copies d’un allèle récessif d que la couleur du pelage est diluée. Le noir se dilue en gris, également appelé bleu ou charbon de bois. Le pelage varie de l’argent à presque noir, mais tous ont le nez bleu. Chocolat / brun / foie se dilue en lilas / bronzage clair / Isabella, leur nez varie de rose, foie à isabelle. Rouge/jaune/crème se dilue en champagne.
Additional Information
Coat colour is an intricate trait that involves a combination of multiple different genes. Testing for a range of different loci will give the most complete prediction of a dog's coat colour genetics.
Additional, undiscovered variants of the D-Locus mutation are likely to exist.
Références
Pubmed ID: 29349785
Omia ID: 31