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ShelteredShadows · Mar 16, 2020 11:18 PM

So I'm just starting to seriously dip my toes into understanding how all of the genes interact with each other; after all, I never claimed science was my area of expertise. Most of the time when everyone discusses genetics I feel like a peasant listening to a group of wizards. But I am curious.

This foal piqued my interest today. I believe her lighter appearance, despite her being black, is from the pearl; is that right? And what would happen if I made her hom pearl?

5825870

SpryOfJune · Mar 16, 2020 11:22 PM

You are correct in saying that the pearl lightened her.

And here is a "black pearl" for reference to your other question.

01$ L Krilly

ShelteredShadows · Mar 16, 2020 11:33 PM

=P~ Oh, that's lovely. Now I'm really tempted to make her hom pearl. But is it the pearl that gives the more bronzish color? Or is that because your hom is E/e for black?

SpryOfJune · Mar 16, 2020 11:38 PM

E/e, E/E, doesn't have an affect on color. (Aside from het/hom cream/pearl blacks - black is black. Het or hom don't change the shade). If it makes sense, red (e) can't change black (E), unless it's ee (chestnut). As long as there's one big E, the horse will be the same shade. Only other color modifying genes (not sure the actual term), such as dun, non dun 1, cream, pearl, silver, etc can change a black horse's true shade. Even sooty and DP isn't noticeable on plain blacks.
Hopefully that's helpful in your question, and answered it, though I didn't outright say.
There may be a few faults in my statement, but I've definitely found on here, 99% of that information is true.
Black and dun make grullo. Black and cream make Smokey black. Black and silver make silver black. Etc.
All of the listed genes can affect black based horses, which is different than a black horse. I.e, bay is black based. Buckskin is black based plus bay.

ShelteredShadows · Mar 16, 2020 11:44 PM

In full honesty...you lost me a bit. You're all wizards, I swear. I think what you said is that the reason yours looks more brown than black, strictly in what is physically seen and not genetically shown, is because of the hom pearl. Is that right?

SpryOfJune · Mar 16, 2020 11:47 PM

That is correct. She only looks the way she does because of her being hom pearl.
I did edit my above comment, so the added info may be helpful also.
If you need more info, please feel free to PM me. I'm off to bed.

AHayesHorses · Mar 17, 2020 8:10 PM

Pearl is a dilution gene. It lightens the base color. When homozygous, the effect is much more noticeable and causes a "metallic sheen"/

Here is what the genetics guide says:

"Pearl occurred later in equine history so is not as common as cream. Heterozygous individuals undoubtedly have some pigment reduction but it is seldom noticeable. Homozygous pearl horses have pheomelanin and eumelanin both diluted, blue to green eyes, and a slight metallic sheen."

Cheers · Mar 18, 2020 2:22 AM

You may find this thread helpful. Feel free to ask any questions on the thread as I am trying to make sure it is clear!

https://hj2.huntandjump.com/forum/discussion/59603/help-with-the-color-genes-in-this-stallion#Item_89

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