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Mismarkes Mismarkes is the most common discolor know in the Aussie and is most often shown as too much white in the head or the collar. It is not for sure know how mismarked is transmitted, but the great variety seen in the Aussie must be due to modifier genes. Mismarked dogs are not normally affected health-like, as it can be seen in homozygotes merles, but dogs with mostly white heads should be check for hearing damages.
Diluted This color is controlled by D locus and is the most frequent non recognized color to be seen among the Aussies, presumably because of the recessive inhered. D is a so-called modifier, meaning that it alter the phenotype expressed by another gen. The recessive homozygous dog will have a wrong diluted color, blacks becomes blue and red, isabella. Diluted red and especially red merle can be difficult to realize because the color can be mistaken for a pale, blurred red. Markings with tan are not affected. Diluted black is recognized in the Border Collie as being blue. One of the resons why diluted isnīt regocnized in the Aussie is perhaps because that, although the diluted black is beautiful, is the diluted red not wanted.
Photocredit of Carina Enevoldsen
Diluted spots The standard states that all colors must be clear. Diluted spot is not exacly a non-recognized colors and many merles, including champions, has one or several dilutes spots, but too large areas are desired. Diluted spots are isles of colors that are a mix of the darkest and lightest color; a dog can sometimes have spots of several colors. A dog with such colors is called Harlequins or Tweeds. Diluted spots have nothing to do with the non-recognized color diluted. Dhe dog below does not show any non-recognized colors.
Running Cobber Running cobber, meaning cobber/tan points which blend in with the basis color or is situated placed that bobber not normally is accepted, is not popular amongst a lot of breeders. The standard does not describe running cobber as a fault, but does say that all colors must be clear and pure. A lot of dogs will have some cobber-colored hair mixed in with the basis color, but often so few that it almost is impossible to see them. Some dogs, as it can bee seen on thigh of the bitch below, can have defined running cobber. Even though it is a bad picture can several cobber-colered hairs be seen beneath the arrow.
White body splashes White on the body can arise as elongation of the white markings (in the middle), as results of a speciel merle gen call Harlequin (to the left), it can be cause by a special white gene or as results of breeding two merles (to the right).
Yellow This
incredible beautiful color arises when the dog is homozygous for the
recessive allele in E locus. E is responsible for distribution of pigment
in the hair, the ressive allel e prevent as homozygous distribution of
color in the hair and turns the coat yellow. The dog is still capable of
producing pigment on the skin which can be seen on the nose, a genetically
black dog will then have a black nose and visa versa. ee is like albino an
example on recessive epistasi (represses expression of another gen from a
different loci), meaning that ee prevents distribution of pigment in the
hair. Yellow is recognized as a color in for example Labrador retriever. One of the reasons why yellow isn't a recognized color in the Aussies, is that it impossible to see if the dog is merle, the risk of breeding homozygous merles will therefore be to high.
Sabel Another related recessive allele is a^s. The homozygous dog will have black saddle-like markings which as an example the German Shepherd are know for. This too is a color that is seen quite rarely but the dog shown below is an example of this discolors.
Photocredit of Fairoaks
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