Can someone explain the dilute gene to me? Miniv☺?
The cream gene is considered an incomplete dilute. It works on both red & black horses as well as bays (which are black based).
Black + 1 cream = smokey black
Bay + 1 cream = buckskin
Red (chestnut/sorrel) + 1 cream = palomino - CAN carry 1 & pass on a bay gene EVEN though will not see bay on the palomino/red base. Can carry and pass on a silver gene that will not be seen on red.
Black + 2 creams = smoky cream - 100% cream gene producer - always a single cream gene passes from this parent
Bay + 2 creams = perlino - 100% cream gene producer - always a single cream gene passes from this parent
Red (chestnut/sorrel) + 2 cream = cremello - 100% cream gene producer - always a single cream gene passes from this parent. Can carry & pass on a bay gene EVEN though will not see bay on the palomino/red base. Can carry and pass on a silver gene that will not be seen on red.
The silver gene can be carried but not seen in coat color of a red based (chestnut/sorrel) horse. BUT it can be passed to any foals - through several generations until a black based horse is born with the gene and displays a silver black or silver bay color. It is now known that silver can affect all black based colors - bay, brown, buckskin & dun.
There is also the Champagne gene carried in miniature horses. I'm not as familiar with it - but it is considered a dominant color gene and it will change the colors of black, bay, chestnut & cream based horses...
Horse testing dot come is a great color site for descriptions. I have a color post on our articles page. There are many other genetic, color websites out there. I believe I have a couple listed on our links, as well.
W/O testing - we now know that Taff is truly a silver buckskin as her 2017 colt by a bay stallion is silver bay. Her son could actually carry two bay genes - if used as a sire (he will not be), he could be a 100% bay gene producer.
Her 2012 colt by a chestnut stallion was a palomino that could have carried a silver gene.
Kechi is a tested Cremello. She carries a bay gene. So her color test looks like this - ee (red), Aa (carries a bay gene), CrCr (2 cream genes). She will always give a "little e" (red) gene and a cream (Cr) gene. She was bred to the same bay tobiano stallion that produced the silver bay tobiano colt above and produced a buckskin tobiano filly. We could breed her to our black tobiano stallion, Echo, (Ee,aa, TT) and still get a buckskin tobiano since SHE can pass on the bay gene that he doesn't have. The black stallion to her could also sire a palomino tobiano as he is heterozygous black (Ee) and could pass on his "little e" (red). He will always sire a tobiano foal out of her.
Toro, the stallion that sired the buckskin tobiano filly & also the silver bay colt above is not color tested. However - his sire, AJ, was - EE, aa, TT. His dam, Magic, wasn't - but would have been E?, Aa, T? based on her coloring (bay tobiano) and the fact that she produced 2 black tobiano foals w/ AJ (so only 1 bay gene). So his color looks like this - E?, Aa, T?. I'm beginning to wonder if he is homozygous for both black (E) and tobiano (T), but won't know for a while by production records or until we have him color tested.