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Articles published in this Newsletter do not necessarily reflect the views of the Editor. Nothing may be copied unless the Editor grants permission. Dates & News: ZimDog News, can be accessed from: www.vanerp.net. I believe that Meryl Harrison has come back to live in Zimbabwe and is
now helping Wild Life Society. KCH & ZKC are holding their AGM’s on this Sunday 28 March 2010 Zimbabwe Kennel Club:
The Zimbabwe Kennel Club office will now only be open
on a Tuesday and Friday each week, 14.00-16.00 CAT. Local Shows and Fairs
He cannot be a gentleman which loveth not a dog [john northbrooke]
German Shepherd Dogs are diverse not only in their abilities but also their appearance. Most people who aren't familiar with the breed mistakenly believe that there is only one colour/pattern combination in the breed, that being the typical 'black and tan/red, saddle back'. Of course, these are the same people that will probably state that your sable is a lovely husky mix, or ask if your solid black is mixed with Lab :) The genes and alleles that control coat patterns and colours are not fully understood, and often complicated (and disputed), but we will try and provide an overview of the colours and patterns that the GSD coat can come in below. The Basics: In genetics, some genes are dominant, co-dominant, recessive, etc. Dominant genes will 'override' recessive genes if both are present, meaning for a dog to physically exhibit a recessive gene, the dominant gene cannot be present. Example: The Saddle Back pattern is recessive to the Sable pattern. This means if two Saddle Back dogs are bred, there can not be Sable pups, because neither Saddle Back parent would carry the Sable gene (otherwise they would be Sable). Another factor that must be considered is whether a dog is Homozygous or Heterozygous for a certain trait. There are at least 2 genes for every trait. Homozygous means that the dog only carries one type of a gene for certain trait (coat pattern, for example.), while Heterozygous means that dog carries 2 different genes for the same trait. Example: A Sable dog can be either Homozygous or Heterozygous Sable. This means it either carries 1 or 2 copies of the sable gene. If the Sable dog had, for example, a sable parent and a Saddle Back parent, that dog would carry both of those genes - Sable, and Saddle back. The dog would appear Sable since that is the dominant gene. This dog in turn could produce both Sables and Saddle backs, since he carries both genes. For a Sable dog to be Homozygous Sable, it would have to have 2 copies of the sable gene. This would mean the dog would have had 2 Sable parents that both passed the sable gene on to it, and also that this dog can ONLY produce sables. Confused yet? Genetics being long winded, complicated, and more than this writer can coherantly explain in the space of one page, we will provide some very helpful links to learn more about the genetics of the German Shepherd. Zwinger von Arlett,
Germany:
The "Sable" German Shepherd Dog.
The Blue Gene: The blue gene is a recessive colour gene. Both parents of a dog must carry this gene for a pup to be blue. At birth, dogs who are blue will be 'grey' or 'silver' in colouration, not the usual black. The blue gene is a Dilute gene, meaning it dilutes all the black pigment of a dog. This means Blue dogs have grey nose leather, and a grey 'dusted' appearance to their coats. The blue colouration can vary from a very light 'powder' blue to a very dark, almost indistinguishable 'steel' blue. Blue dogs will also have very light eyes, often being very blue at a young age, and as the dog grows, going through varying shades of green and yellow, often ending up yellow or a light shade of brown.
The Liver Gene: The Liver gene is also a recessive colour gene. The Liver gene blocks all black pigment, resulting in a dog that has brown nose leather, and a brownish coloured coat, where it would normally be black. The 'liver' colouration has a range of shades, varying from a very light brown to a deep chocolate brown. Like the blues, liver dogs also have light coloured eyes of varying shades.
Next month a little more on colours: Solid black, Bi-colour, Whites and Sables
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Last Updated 27-03-10 |
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