HGG Community Forums

I'm not sure if there is a current gene list, but there should be good posts in the announcements section of the forum from when each new gene is announced.

Basic run down of the 3 you listed:
Kit Promoter - homogeneous KP with any two Kit genes results in a very uniquely wild generated kit patterns.
http://www.huntandjump.com/horse.php?horseid=2261352
http://www.huntandjump.com/horse.php?horseid=2318895
http://www.huntandjump.com/horse.php?horseid=2462013

Gulastra Plume - Bay horses (E? A?) with homogeneous GP have a tail that is nearly white, and slightly smudged mane.
http://www.huntandjump.com/horse.php?horseid=3071260
http://www.huntandjump.com/horse.php?horseid=3071255

Dense Pigment - Chestnut horses (ee) with single or double DP, and no/single/double copies of Sooty(Sty or S+) have a much darker, much redder coat color. Includes black chestnuts and liver chestnuts.
http://www.huntandjump.com/horse.php?horseid=2875437
http://www.huntandjump.com/horse.php?horseid=2877012
http://www.huntandjump.com/horse.php?horseid=2910735

KP stands for Kit Promotor. This is a gene, that only shows if a horse has two copies of KP (= homozygous) and has two KIT genes (for example all sabino's, all white's, roan or tobiano). Then the horse gets random and unique white on it's body. Just like this horse:
http://www.huntandjump.com/horse.php?horseid=2428556
He is homozygous KP and has roan and tobiano (two KIT genes). Whenever a horse has only one copy of KP (is heterozygous) or just one KIT gene, the white won't show. The horse is still able to pass it on though!

GP stands for Gulastra Plume. This is a gene that gives the tail of horses with Agouti (brown/bay/buckskin etc) a different colour. It only shows on Agouti horses! A horse can be homozygous, then the tail is much whiter. It looks like this:
http://www.huntandjump.com/horse.php?horseid=2325321
This girl is homozygous GP. Heterozgous (one copy of GP) only is slightly visible on buckskin horses. It looks like this:
http://www.huntandjump.com/horse.php?horseid=2221372
You can see that the tail is lighter, and the manes too, but that the tail is not as white as with a homozygous GP horse. However, only buckskin horses show this heterozygous GP!
To make things more complicated, champagne hides if a horse is heterozygous GP, like this horse:
http://www.huntandjump.com/horse.php?horseid=2171228.
If you look at her color test, she is an amber cream champagne. Without the champagne she would be a buckskin, but as you can see she doesn't have a lighter tail and manes like a buckskin would have when heterozygous GP. But homozygous GP shows just fine on champagne:
http://www.huntandjump.com/horse.php?horseid=2718003.
And to add another complicated factor to the bunch: Silver hides GP completely. It doesn't show at all, wheter a horse is heterozygous or homozygous GP; silver hides it.

DP is a very new gene. It stands for Dense Pheomelanin (or something like that xD). It shows only on red based horses (chestnuts, palomino's etc). It makes them darker, so that we can have chocolate palomino's, liver chestnuts and just more different chestnut colours! There are different gradations. In combination with Sooty (Sty or S+) and homozygous DP the horse can get really dark. I'll give you some colour examples:
Heterozygous DP, no sooty:
http://www.huntandjump.com/horse.php?horseid=3032580
http://www.huntandjump.com/horse.php?horseid=2973852

Heterozygous DP, 1 copy of sooty:
http://www.huntandjump.com/horse.php?horseid=2973408
http://www.huntandjump.com/horse.php?horseid=3209607

Heterozygous DP, 2 copies of sooty:
http://www.huntandjump.com/horse.php?horseid=2879560
http://www.huntandjump.com/horse.php?horseid=3008191

Homozygous DP, 1 copy of sooty:
http://www.huntandjump.com/horse.php?horseid=3195205
-Note the slight difference in amount of redness when you compare this girl with this boy beneath

Homozygous DP, 2 copies of sooty:
http://www.huntandjump.com/horse.php?horseid=3004339
http://www.huntandjump.com/horse.php?horseid=3121475

As you can see, the horses are darker than they normally would be. Wheter a horse is homozygous DP or not in combination with the amount of Sty (none/heterozygous/homozygous) determines how dark a horse will be. For more information about DP read this topic: http://www.huntandjump.com/forum/discussion/2494/new-gene-added-to-the-game-plus-updates-to-flaxen-silver-and-cream-horse-manes-and-tails-#Item_1 It is the announcement thread that Ammit posted when she introduced the gene back in november.

Unfortunately I can't find the other announcement threads about the KP and GP since they are at the old forums. If you have any questions, please let me know! Hope this helps!

Can I also just add that now I realize why fate led me to be an App person. All these modifiers are making my head spin.

Oh, I know a lot, if not most, of these genes are real. Just so many different things to consider when breeding.

Still not completely getting the KP thing lol. But I also live on game time, and should be sleeping, like the rest of my family has been... for hours 8-}

Need the correct links for the foals ( you used the mares again), but the mare is a DP.

Well, the first foal is black based, being buckskin, so no they don't have the gene (as far as the game goes, it's the red based that shows the dense gene), and the second, while it is a grey, doesn't look dark enough to be carrying the gene, but then the grey gene tends to make the horses color look "denser" sometimes. The only way to tell if the grey is dense, is to color test it to see if it is SS for sooty, because she looks at least StyS. If she is SS, then she might be dense, because she would be too dark for a SS.

KP is a fantasy gene, that means it is just for fun. Dp and GP and hypothetical genes. That means they are likley to be real but have not been found in the gene sequence yet.