[ SHOWGSD-L ] Re: How "white" GSD come about
- From: "Ginger Cleary" <cleary1414@xxxxxxxxxxx>
- To: "Showgsd-L@Freelists. Org" <showgsd-l@xxxxxxxxxxxxx>
- Date: Sun, 26 Aug 2007 21:48:53 -0400
I am not sure I agree with her :-) I am quite familiar with dilution genes
as I have Shelties.
White is completely independent of the genes for sable (agouti), black and
tan, or solid patterns that occur in colored dogs. It is also totally
independent of either of the blue or liver dilution genes found in the
breed. The white gene masks the genetic coat pigment of the dog, although it
does not affect skin pigment. A good white should have dark eyes, and a
black nose and lips.
Because white is in a different location on the chromosome from the genes
for patterns, primary body colors, and marking colors, a white dog may
genetically be of any pattern or combination of primary and marking colors
found in the dark dogs. For example, a white dog may actually be genetically
an agouti dog carrying the two-tone gene. When such a white dog is bred to a
solid black dog, the black dog would provide the pigment allowing the
genetic patterns of the white parent to show up in their non-white progeny.
That is why black to white breeding can produce sables and black/tan dogs.
Only if the white parent has at least one gene for the solid pattern can a
white to a black produce solid blacks. The colored parent must also possess
at least one gene for the white recessive gene for a black to a white to
produce whites. Dogs of other patterns than solid black may produce any of
the patterns and colors found in colored dogs when bred to white, depending
on what pattern and color genes BOTH of the parents possess.
I do believe that the gene for recessive white is totally independent of
paling genes.I have seen too many dogs of rich pigment born out of white to
colored breeding,and there was absolutely no indication in the non-white
progeny that they carried the white recessive.
Breeding white to white will result in whiter whites,and that breeding white
to dogs with red ground color will produce whites with more cream tinge in
their white. It is interesting too,that when a white has cream tinge-the
cream usually is in the parts of the coat corresponding to the darkest areas
on a sable or black//tan dog-possibly a further indication of which whites
also possesses pattern genes. It is likely that breeders of whites selected
dogs of paler pigment to breed with whites, in an effort to produce a whiter
white, instead of white causing paling in colored dogs carrying a white
gene. I have seen a number of good whites with excellent black pigment and
very white coats. White whites with black pigment are the most desirable,but
like good breeders of other colors,reputable white breeders also have to
consider many things other than color in choosing their breeding partners.
There are two different dilutions of the black color possible,diluting it to
blue or liver. A dog with normal black pigment can carry both the liver and
blue gene,as blue and liver are at different places on the chromosome. In
either dilution, the blue or liver color replaces the black pigment on the
dog.
The dominant white spotting gene found in nearly all mammals is common in
the GSD. It is independent of the genes for the coat color and marking
patterns in the breed. The most common sites for dominant white spotting
include the tip of the tail, the chest, and the toes. It does NOT indicate
anything as to whether a dog carries recessive white. It does NOT indicate
whether a dog carries genes for rich or paled colors or dilutions. This
white spotting gene is not the same Irish White spotting gene as seen in
Collies, Shelties and a number of other breeds. The Irish Spotting gene is
extremely rare in GSDs.
Ginger Cleary,Rome, GA ww.rihadin.com
The essence of Government is power; and power, lodged as it must be in human
hands, will ever be liable to abuse. ? James Madison
Member GSDCA
Member Sawnee Mtn Kennel Club
GA Director Responsible Dog Owners of the Eastern States.
-----Original Message-----
From: Scharo777@xxxxxxx [mailto:Scharo777@xxxxxxx]
Sent: Sunday, August 26, 2007 9:28 PM
To: cleary1414@xxxxxxxxxxx; showgsd-l@xxxxxxxxxxxxx
Subject: How "white" GSD come about
In a message dated 8/26/2007 12:04:17 A.M. Central Daylight Time,
cleary1414@xxxxxxxxxxx writes:
It is not at all uncommon. White in GSDs is a "masking" gene. So
underneath
that white (genetically speaking) is another color. In the case of
these
pups it was obviously sable for at least one of the parents.
I asked Sherry Wallis about this.
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