Originally Posted by Chiilaa
Your horse can't be black with a silver gene. If she were, then she would have a paler mane and tail, especially considering she is a RMH. They tend toward a lot of expression. Even other breeds, while they may not get the full silver effect in the mane and tail, most will have a definitely noticeable change in colour of mane and tail.
And that website is a really old one, with a lot of misinformation on it now that we know more about the genetics. One of the best sites is this one: Equine | Color Genetics
not only do they have a lot of really accurate information, but they will keep up with current research very quickly.
I always assumed (obviously wrong) that what caused Vida's dapple was the silver gene. I also, again obviously wrongly, assumed that in order for a RMH to have the chocolate flaxen coloration was for one parent to have the silver gene. I was told by the breeder that Vida had the silver gene. Of course that was 10 years ago. Can a gene not be present but not express itself to a parent only to it's offspring? As I stated I'm not a geneticist but by the information on the site you offered. "The dominant allele of extension 'E' causes the production of eumelanin in the horse's coat causing a "black base color
"...ALL other phenotypes other than red and black are caused by the addition of other modifiers/diluters"
Dilutions- "Black Silver (Chocolate, Silver Dapple)
A black horse with silver can
range in shade from creamy to nearly black in color. The mane and tail can be from white to a color similar to the base coat,
or appear sooty. The body commonly has dapples
. They were traditionally mistaken for flaxen liver chestnuts, or very sooty palominos. But the roots of the hair and the lower legs are both areas which usually appear lighter in true chestnut horses." I will be sure to check the expiration date on any further information I attempt to share.
Vida is obviously the black one. Saro, her daughter is the chocolate flaxen.. They are all summer faded in this photo.