[ SHOWGSD-L ] Re: question: Black and Red

  • From: Terry Cochran <tinky91147@xxxxxxxxx>
  • To: proudk911@xxxxxxxxx
  • Date: Thu, 22 Jan 2015 19:12:24 -0700

If I read this a few more times I may get it. Where do the white spots come
from? I am talking the white that covers most of the chest and comes up the
neck to the chin.
Thanks
Terry

On Tue, Jan 20, 2015 at 10:02 PM, Jen Proud <proudk911@xxxxxxxxx> wrote:

> I must respectfully disagree.
> Pattern (in order of dominance: sable, tan point, self color) is on the
> agouti locus
> Expression (or some still call Extension) is whether the dog will express
> what is its agouti locus, or not- as is the case in a white
> GSD; the self-colored mask is the dominant gene at this locus, giving the
> large majority of GSDs who can express phaeomelanin at their agouti locus a
> black face mask
> There are commercially available tests for both of the above traits. Both
> combined cost less than $150 US per dog.
> eXtension (another unknown locus- hence why I like the X) determines the
> amount of self-coloring present on the mantle, and is what causes a saddle
> to range from very small and even "browned out" to a bicolor with minimal
> markings... Or can turn a genetic self-color into what we could call a
> bicolor because they actually are "browned out" which (somehow) allows a
> self color dog to show its phaeomelanic pigment!!!!
> HOWEVER- it is an yet unknown location where the modifiers for the
> Intensity of that phaeomelanin that determine how dark it is.
>
> If the dog has the correct Intensity modifiers to produce red
> phaeomelanin, they will be black (or blue or liver depending on genes at
> unrelated loci) and red, regardless of what pattern they are expressing at
> their agouti locus with the exception of the most recessive a-a self color
> (and therefore no phaeomelanin produced).
> A red sable would be a red saddle would be a red bi-color regardless
> unless you changed his Intensity genetics to make him tan, cream, or
> silver.
>
> :)
>
> Jen P & her Pack who knows color/pattern is more just window-dressings in
> a breeding and that a good dog is a good dog is a good dog regardless of
> pattern (agouti locus expression) but finds color genetics fascinating and
> likes things to be functional and pretty at the same time. How demanding of
> me.
>
>
> On Tuesday, January 20, 2015, Penny Kroh <farmdogforever@xxxxxxxxx> wrote:
>
>> It would pop up more often Flowerboy, if more people would breed to
>> solid blacks or bi-colors.  <G>
>>
>> Penny in NC
>> The Farm Dog Forever
>>
>> On Tue, Jan 20, 2015 at 1:53 PM,  <edwinx@xxxxxxxxxxx> wrote:
>> > This is NOT a German VS American question so please don't misunderstand
>> the
>> > question! It seems that the majority of German working style GSDs are
>> > black/red...and the majority of American/Canadian conformation style
>> GSDs
>> > are NOT black/red. Yes I know all strong colors, except the
>> disqualifying
>> > ones, are permissible... I like black and red! My half German bitch is
>> black
>> > red...just wondering why it seems not to pop up very often in most of
>> our
>> > "show" dogs Ed
>> >
>> > Sent from Xfinity Connect Mobile App
>>
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>
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