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Timber · Mar 11, 2018 4:10 PM

So as I was comparison testing some stallions, a trio of horses came up equal to one another. While trying to eliminate two of them, I found myself puzzled.

JS1582460

JS1582464

These two seem to have similar genetics aside from the obvious differences of a Dun gene, Appaloosa gene, Rabicano gene, and Kit20. From what I understand about those genes however is that none of those should affect the vast difference in base coat color. No lightening or darkening genes seem to be present on either of them as well. Am I missing something? I've been scouring the genetics posts but haven't found anything that helps.

ObsidianKitsune · Mar 11, 2018 4:14 PM

I have found that the dun gene actually DOES lighten up the coat. Or, at least on the body it does. Then there's also the fact that with your dun boy, he doesn't have het brown expressed. The bottom one does. Het brown is always darker than hom brown. The reason why the top one doesn't have it expressed is due to the At gene being dominated by everything apart from the "a" gene.

Here's another bay dun horse, base coat identical to yours.

PR Brewing Trouble

Timber · Mar 12, 2018 10:43 AM

I honestly didn't know that about the sun gene. Awesome, I learned something new. Thanks!

kassierae · Mar 12, 2018 1:04 PM

Dun is a dilution gene, it dilutes the base color and leaves the primitive markings. LP and some white spotting patterns can also cause some color shifting, though I'm not sure if that's true in game or not.

kassierae · Mar 12, 2018 1:06 PM

Adding to that, one is brown based and the other is bay based. Brown is darker than bay unless homozygous.

Salvistar · Mar 12, 2018 2:22 PM

It's definitely the dun that is affecting your base color the most.

Appaloosa can also have a bronzing affect which your appaloosa is showing some signs of that which is further affecting his color. The bronzing is really obvious in the mane and tail. Here's a grullo with appaloosa showing the bronzing:

SS Jump The Moon

Here is a plain grullo without appaloosa for comparison.

SD Days In The Sun

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