Quote:
Originally Posted by elf
On the original paper describing the b mutation (2002 Schmutz, S.M., Berryere, T.G., Goldfinch, A.D. : TYRP1 and MC1R genotypes and their effects on coat color in dogs Mammalian Genome 13:380-387, 2002. Pubmed reference: 12140685), there is an interesting part where a dog (Grackle), carrier of b, had her closest brown ancestor is six generations back.
Have we enough information on the GSD used in the breed foundation to go against such exemple ?
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I was informed that for sure there was not even one "red nose" CsW born.
There are also no information about any red GsD used for making our breed - and we must remember that for CsW the founders used pure well documentated Shepherds.
So for about 40 years there were no red dogs born. Good enough to say that 'b' do not appear by Czechoslovakian Wolfdogs. So for Sibir and Thalia the DNA test of the coat colour can give already a good proof that they are not purebreed.