Brindle Question - Page 2

http://www.crittercamera.com/mbauggieledaped.html  Here is the link to her pedigree for jc who asked.  If you should find anything please update me. 

Sue I took her to the vet after reading your post this morning.  He said he could find nothing wrong as in any kind of skin problem.  But since I keep a stash of things I looked it up and found out Cephalexin is the reccomended treatment and I have her on 250 mg once a day for 10 days to see if that makes a difference. 

Thanks for all the replies.  I will keep everyone posted.  The breeder of her mom has over 30 yrs experience in the breed and she says it is genetically impossible.  Thanks to the person that shared the pic.  Someone else sent that to me about a week ago along with the parents' pics and the bitch's breeder also said that was genetically impossible; that it must be a mix. 

I kept her back because she was small and I like a small female and also for being half American she has a hell of a lot of drive.  I have been doing puppy bitework with her and I am more and more impressed.  Plus she has a super temperament, lots of confidence and lots and lots of intelligence.  She is only 13 weeks old and already solidly housebroken, crate trained, doggy door trained, speaks and sits for her food and treats. 

Again thanks to everyone who replied.

vonissk, can I also ask... do you have a photo of the whole dog and possibly one of her as a young puppy?  It would be really interesting to see.

http://www.pedigreedatabase.com/gsd/pedigree/452944.html

The headshot above - this is his sire.  Name may not be correct, he only has AKC conditional registration (offspring are AKC but cant be shown for three generations) since they do not have his sire's DNA on file for a match.  Looks like brindle is coming back!

Pod, yues I will post a pic of the whole dog but it's not a great one where you can see the coloration.  She is only 13 weeks old now.That;'s why I took the close up pics of her hair coloring  because in these pics you can barely see it.

Reggae thanks for posting that link.  Interesting. I personally think the dog is pretty.  Would like to know more about his mother.

The pics I posted, as I said, just make her look like a normal sable but if you could see her in person you don't need to see her close up to see the markings. 

If I am not mistaken, brindle only affects the black in the coat?  So a sable would only be brindle on the tips, giving it that faded brindle look your pup has that is very hard to detect.  Probably wont be able to see it at all as an adult.  Would be interesting to see what she produced bred to a black or dark sable.

vonissk, here is the reply from my friend the geneticist

This comes up now and again.  The gene series which codes for brindle also codes for dominant black.  The 3 alleles (versions) of the gene are:

K – dominant black – if either one or two copies are present-the dog will be solid black

kbr – brindle – if no copies of K are present, then one copy of this allele is enough to make the dog brindle.  But if the dog also carries the K allele, then the dog will be black, carrying brindle

k – causes no phenotype on its own.  It allows the genes at the agouti locus (black/tan, sable, etc.) to be expressed without change.  GSDs should ALL be k/k.

So a dog that is expressing dominant black can have all of the following genotypes: 

K/K – all offspring will be black

K/kbr – possible to have brindle offspring

K/k – possible to have offspring that are not black – but not brindle (unless mate carries brindle)

A brindle dog can have the following genotypes:

kbr/kbr

k/br/k