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-   -   Is it worth color testing her? And if so, what tests? (http://www.horseforum.com/horse-colors-genetics/worth-color-testing-her-if-so-156121/)

Cait 03-11-2013 09:18 PM

Is it worth color testing her? And if so, what tests?
 
I will be breeding Ellie in the next month or so to a solid dunskin. I have always kind of wondered what her color was and if she would be homozygous for paint, so I am debating getting her tested.

I am fairly positive that she is a chestnut, but she has a dorsal stripe, which throws me off. I have had people tell me that she is a red dun because of that stripe, but she just looks too orangey to me. She also has some roaning in the summer.

Ellie's sire was a chesnut overo paint and her dam was a sorrel tobiano. So I really want to know what my chances would be of a paint foal.

So, what should I do here? Is it worth testing her? If so, what tests do I order through UCDavis?

http://i62.photobucket.com/albums/h1...DSC02158-1.jpg
http://i62.photobucket.com/albums/h1...e/DSC05401.jpg
http://i62.photobucket.com/albums/h1...e/DSC05179.jpg
http://i62.photobucket.com/albums/h1...e/DSC05234.jpg
http://i62.photobucket.com/albums/h1...e/DSC05180.jpg
http://i62.photobucket.com/albums/h1...e/DSC04964.jpg

haviris 03-11-2013 09:45 PM

She is sorrel/chestnut, only thing she could be based off her parents colors. She is not homozygous for paint, so you have a 50% chance (probably a little less, because she may pass the genes, but be to minimally marked to know it).

I would definately test her for frame!!

lilruffian 03-11-2013 09:49 PM

She can only be a dun if one of her parents was a dun so if they were not then the "dorsal" is just countershading.
The "roaning" is most likey caused by the sabino gene but if you are going to test her for anything, test her for frame as haviris said, as the "paint" markings may be the only thing she is hiding.

Bridgertrot 03-11-2013 10:05 PM

I wouldn't say she's dun. If neither parent was dun, then it's impossible for her to be. The dorsal is just countershading. Same thing with roan, at least one parent must be roan in order for her to be one. But it's not uncommon for some horses to have some white ticking but hers is probably from the sabino. I'm thinking she's just chestnut with sabino...frame is possible so I'd get her tested. .

Chiilaa 03-11-2013 10:58 PM

I would say frame is almost definitely present. Sabino on its own won't cause face white like this - it likes relatively neat face white. It could be splash causing it, but I suspect frame because of the lack of leg white.

Poseidon 03-12-2013 12:46 AM

In addition to what has already been said, just pointing out that a horse cannot be "homozygous for paint." Pinto/white patterns that Paints carry are caused by multiple genes, which can individually be homozygous. That's all. :D

NdAppy 03-12-2013 08:28 AM

Cait please test your mare for frame and if she is positive please, please check that the stallion you intend to breed to has been tested negative for frame.

If you breed two frame positive horses together you have a 25% chance of a foal that will die in horrible pain within 72 hours if not humanely euthanized.

MelissaAnn 03-12-2013 08:39 AM

Also, please understand that frame can and does hide in horses that look "solid". So the stud not being a pinto or paint does not mean that he does not have frame. A test is the best way.

NdAppy 03-12-2013 08:54 AM

This mare, Spice who is owned by a member here, has no other white on her than this star -
http://www.horseforum.com/horses/pho...91fe0_full.jpg



This miniature has also been tested and carries the frame/OLWS gene but has absolutely no white on him -
http://colorgenetics.info/equine_gal...efoalNOLEG.JPG

verona1016 03-12-2013 09:29 PM

Definitely worth testing her for frame (a.k.a. lethal white overo) as was already mentioned- not just for what pinto pattern(s) she might be able to pass on, but also to eliminate the chance of ending up with a dead foal.

The roaning and general messiness of the edges of her markings is a pretty good indicator of sabino, but you can test for that to be certain.

There are also tests for Splash and Tobiano patterns, but I'm guessing those would come up negative.

She doesn't look to carry dun (the dorsal appears to be countershading), so I wouldn't bother testing for that.

Testing for agouti can help narrow down what the odds are of getting specific colors, but might not be all that helpful if you don't know the agouti status of the stallion, too.

I don't think there's anything else I'd consider testing for. And I'd go with UCDavis- they had very quick turnaround the time I used them.


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