Some color patterns are easy to understand. Some are not so easy. With the Red Brindle gene, why are some dogs more heavily brindled than others? Is their brindle pattern a separate unknown modifier gene or is it simply random how the dogs color out? The dogs below are genetically identical red brindle-yet one is obviously much darker than the other. In show terms the dog on the left is called a Red Brindle and the dog on the right is called a Black Brindle.
Left-DC Aragon Autumn Storm CDX TDX RA SC VCX (Apollo)
Right- BISS DC Aragon Night Frost VCD1 CDX TDX RE OJP SC VCX (Spirit)
The same is true with the Blue Brindle(Dilution gene added to the Red Brindle). The dog on the far right has very little blue brindling and for some reason is called a reverse Blue Brindle. The dog in the center is the more typical Blue Brindle. The dog on the far left is the Red Brindle.
Left-Ch Aragon Black Ice
Middle-Aragon Mystic Pearl
Right-Ch Aragon Aroi Silver Lining
Another question that has always puzzled me is the amount of color expressed in a Parti color dog. All three dogs below are called Parti colored but the amount of color is dramatically different. Why? The first dog is almost all white with a spot of red on his ear. He is registered as a red and white parti and will throw the parti gene and the red gene.
Ch Jets The Boy Next Door
The next dog shows a typical amount of coloring for a Parti dog
Ch Aragon Lunar Eclipse VCD1 MX MXJ RE JC
And the last shows an extreme amount of coloring
Ch Aragon Silver Oak
All three partis will throw their base color(the above three dogs Red Black and Brindle) +/- dilution gene and the Parti gene
Thats all for color genetics in the greyhound. Next posts will be back to the dogs.