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I think I understand the basic genetics of coat color in the LR, that determined by the B, b, E and e alleles, thoroughly; but sometimes this may not be enough.
I have a 2+ year old black LR from a black (BBEE per Vetgen) x black (BBEe or BbEe per breeding results) breeding. His undercoat fur is brown and some guard hair (in the area where the upper and lower lips meet) shows a reddish brown tint. This isn't so easy for me to figure.
I found a hint, maybe, at the vetgen site: http://vetgen.com/canine-coat-color.html where they show a pathway to solid black or brown color through the various K and A alleles. I wondering if this is what I'm seeing in this pup. Any one have any ideas? I presume this color anomaly is NOT very common in black Labs but folks here have seen many more than I.
"Somehow this creature has completed my manhood; somehow, I cannot explain why, a man ought to have a dog. A man ought to have six legs; those other four legs are part of him." -G.K. Chesterton
Concentration or shade of yellow (or chocolate for that matter) IS more difficult to understand, but the overall picture of black, yellow, chocolate is easy peasy
Thanks everyone for the info. It has been very helpfull.
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Black Water Creek Retrievers
Last edited by Jere; 07-10-2013 at 07:38 PM.
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When did it become ok to breed to recessive gene dogs?
Is the reddish sheen you're seeing on the guard hair, the undercoat or both? I'm wondering if the brown folks see when the black dog "blows its coat" is really brown underfur that isn't noticed until it is coming out with coat change? I that case this may be more common in Labs. than commonly thought.
The brownish color I'm seeing on this dog's body is from the brown underfur not the guard hair. This difference between the guard hair and undercoat colors is what has me stumped. I haven't found any discussions of this yet. Probably I should pursue the discussions I started with the vetgen geneticist a little more and maybe get the full color gene panel run - including K and A as well as B and E.
If it is really rare in LRs I'd be thinking of doing the mixed breed testing too.