Color results from UCDavis

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Equuisize

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UCDavis did a quick turn around on Zoe's color testing.

I have the results back and have to say I'm amazed and

confused at the same time.

As a foal, her AMHA registration was returned to her breeder saying

she was a palomino not a chestunut/sorrel. She is registered as such.

The more I've read on here and other people's comments, over the

years, I was beginning to think she could be a silver bay.

Stacy kindly pulled hairs for me (yes, I'm chicken) Results are below.

I don't know if this photo properly shows what I see in the daylight

as she shows a strong black cast to her coat and also has black hairs

in her mane and tail. She doesn't, however, show the graying on her

legs I associate with silver. Testing came back she is NOT silver.

I'd be interested in hearing your views on what color I should request

her papers be changed too, for the sake of accuracy. According to

the test results she is a redhead but is there a shade of red she could

more accurately be described as? Could the recessive agouti be

giving her the black cast?

Red-Factor Result:

e/e - Only the red factor detected. Basic color is sorrel or chestnut in the absence of other modifying genes.

Agouti Result:

a/a - Only recessive allele detected. Black pigment distributed uniformly. Basic color is black in the absence of other modifying genes.

Cream Result:

N/N - No evidence for the Cream dilution altered sequence detected. Basic color is sorrel or chestnut, bay or black in the absence of other modifying genes.

Silver Result:

N/N - No evidence of the altered sequence detected.

Overo Result:

N/N - No evidence for the altered sequence detected

Sv300168.jpg
 
She has no agouti, so is not carrying it, so it can not affect her color. [With Agouti either you have it "A" or you don't "a".]

Neither horse in the photo looks to be anything other than sorrel; the mare looks to have Flaxen, accounting for her lighter mane/forelock.

I have a couple red based horses that have a few dark hairs mixed in, but they are still just sorrel. Even my palomino full-size gelding has a few black hairs mixed into his tail, he is still just palomino.
 
The filly looks chestnut and she is chestnut.

The "overo" test is Sab1? (which does not mean she is not "overo" and the mare certainly looks Splash to me....)or do you mean LWO??
 
Congratulations- you have a chestnut! I agree their phrasing is confusing, but there is no "recessive Agouti" as far as I know; you either have it or you don't (the recessive allele instead of Agouti). Agouti affects the distribution of black so a black-based horse will become a bay if the agouti gene is present, and will stay black if it's absent. I'm not sure what it does on a red-based horse, maybe 'hides" like silver does? Bay is one of the gaps in my genetic education.
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But in either case a strictly red-based horse like your girl has no black gene to be modified so it definitely has nothing to do with any black in her visible color.

Looks like basically AMHA made a booboo when she was a baby. Gee, that's never happened before!
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Leia
 
Jane, I didn't have her tested for Sab1 - guess I should have.

My main concern was if she was LWO+ then I'd want to test

all their daughters before considering breeding them.

Visually she is a beautiful red head but the black cast to the

red confuses me, yet. Even with the testing it doesn't explain

to me, why she has such a heavy black cast to her shed out

summer coat.

That photo wasn't the best to show what I am trying to describe.
 

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