Fawn (colour)

As a fawn is called a beige hue with different pets. The English equivalent is fawn.

Dog

Fawn-colored dogs can arise in different ways. You wear at least once ay allele of the agouti locus or allele e of the extension locus twice.

Ay allele of the agouti locus

The allele is dominant ay against the other three known agouti alleles aw (wild type), at ( Fawn ) and a ( non-agouti, recessive black coloration ). So the dog is fawn, must be present on the K- locus allele homozygous ky addition, since the other two other alleles would lead to a brindle ( kbr ) or dominant black fur ( kB). The allele EM of the extension locus leads to a black face mask in dogs that are by ay fawn. An unknown gene can result in dogs with the gene ay to a saddle drawing from dyed black hair.

E allele of the Extension locus

The allele e is recessive to the other alleles of the Extension locus and its Rehfarbe posits itself only when it is present twice (homozygous ) ( ee). At the same time it is epistatic to all alleles of Agoutilocus and the K locus. Dogs with the genotype ee are therefore always fawn, no matter which genes are present on Augouti and extension locus. By ee fawn-colored dogs never have a black face mask.

Braungen and MLPH gene

If Weimaraner appear fawn, this color is due to the fact that black was brightened by the brown gene and the MLPH gene ( Dilute gene). Since it is due to eumelanin, this color could also be influenced by the Merlegen.

Influenced by other genes

Both forms of Rehfarbe can also occur diluted. Since the MLPH gene (see Dilute gene) pheomelanin hardly changed, a not yet genetically -studied gene is responsible for this i made ​​when it is heterozygous ( only once ) is present. If the gene i twice before, the dog is lightened to white. There is also the Italian greyhound obviously another Dilute gene, which also lightens phaeomelanin and is not identical with the MLPH gene. The brown gene leaves the coat color change, but lightens the skin to brown. The Merlegen not affect the Rehfarbe and can therefore be passed unrecognized by fawn-colored dogs.

Furthermore, the various Leuzismusgene can cause genetically fawn-colored dogs are white, getting white patches or mixed with white hairs.

By Braungen receive fawn-colored dogs with unchanged coat color a brown nose

Rehfarbener Weimaraner.

Swell

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  • Candille SI, Kaelin CB, Cattanach BM, Yu B, Thompson DA, Nix MA, Kerns JA, dirt SM, Millhauser GL, Barsh GS: A- defensin mutation Causes black coat color in domestic dogs. Science. 2007 November 30, 318 ( 5855 ) :1418 - 23rd PMID 17947548
  • Kerns JA, Cargill EJ, Clark LA, Candille SI, Berryere TG, Olivier M, Lust G, Todhunter RJ, dirt SM, Murphy KE, Barsh GS: Linkage and segregation analysis of black and brindle coat color in domestic dogs. Genetics. 2007 Jul; 176 ( 3) :1679 -89. PMID 17483404
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  • Dirt SM, Berryere TG: Genes Affecting coat color and pattern in domestic dogs: a review. Anim Genet. 2007 Dec, 38 (6 ) :539 - 49th PMID 18052939
  • Sheila Schmutz: Dog Coat Color Genetics. Stand 7/2008
  • Dirt SM, Berryere TG, Ellinwood NM, Kerns JA, Barsh GS. MC1R studies in dogs with melanistic mask or brindle patterns. J Hered. 2003 Jan-Feb; 94 ( 1) :69 - 73rd PMID 12692165
Tan (color) Melanism Golden Retriever Albinism Dilution gene Merle (dog coat)
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