HGG Community Forums

Here's the table of all-white interactions including the Kit genes :)

https://www.huntandjump.com/faq.php#870

Olw is the old notion for frame, I believe it is just 'O' or - now.

Also, remember you are looking out for the highest risk white combination in any pairing, since they can only pass on one of their genes to the foal.

also try to not breed to an " excessive" white factor ; the more white a horse has the more likely for lethality

Appy isn't classed as a white gene. Only the Kit genes and the WF affect for death (I believe)

I'm not a genetics expert by any stretch of the imagination, so keep in mind that what follows is based on things I have picked up playing this game. Some of my ideas are most likely mistaken or poorly understood, so I hope that someone more knowledgeable will come along and correct me. (Ammit is pretty good about this. :) )

Kit is a very long gene that in horses plays an important function in pigmentation (putting color into the hair (and probably skin, but I'm not certain about that). It has a tendency to acquire breakages and more than 20 of them have been identified. Each break in the gene causes a different pattern of white markings. These range from the common roan and tobiano through the various mutations classed as "white spotting". If the two copies of the Kit gene are both broken badly enough, the foal dies in utero and is never born.

There are two genes MITF and PAX3 where breaks produce the white patterns known as Splash 1 and 3 (MITF) and Splash 2 (PAX3^C7OY). In the game, we also have Splash M, which is based on a gene that actually occurred in one stallion, but because it caused reduced sperm motility, he was gelded and so it is no longer found in real horses.

Appaloosa is, I think, a completely different complex of genes totally unrelated to either Kit or the various Splash mutations.

There are no lethal issues with Appaloosa. Kit mutations can be dangerous in some combinations and/or higher White Factor. Splash 1 and Splash M work in combination with any Splash mutation combination. Splash 2 and 3 are homozygous lethal and lethal together.

Frame is another separate gene that can be lethal if a foal gets 2 copies.