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Old 07-18-2006, 01:55 PM  
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OLWS Gene

HYPP - if sire and dam are n/n, then offspring will be as well - correct?

Is the OLWS gene the same way? If a stallion is negative and bred to a solid mare - can the foal possibly carry the OLWS gene?
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Old 07-18-2006, 01:57 PM  
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Negative horse bred to a negative horse can only produce a negative foal.
However-a solid mare can be positive for the gene.
After testing the mare-you will know for sure.
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Old 07-18-2006, 01:59 PM  
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so a horse that is not considered overo could possible carry the OLWS gene?
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Old 07-18-2006, 02:03 PM  
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Yes. Because overos are bred with other patterns, you can have even a breeding stock that carries the lethal white gene. For the price, it is well worth the peace of mind to test any breeding animal with Paints in its pedigree.
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Old 07-18-2006, 02:05 PM  
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The thing with Overo is, a horse can appear to be NON overo through their phenotype (what you see) but genetically they are indeed an Overo.

You would need to have the mare and stallion tested for OLWS to be sure.

If she is negative, the stallion is negative:
0% chance of a OLWS foal

If she is positive, the stallion is negative:
50% chance of a OLWS positive foal (carrier)

If she is negative, the stallion is positive:
50% chance of a OLWS positive foal (carrier)

If she is positive, the stallion is positive:
I believe it is a 1-4 chance that your foal will be OLWS (fatal)


Im no expert, so if Im wrong someone please correct me! Still learning myself.

Brittany
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Old 07-18-2006, 02:07 PM  
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Here's another question - Do only horses with paint on their pedigree carry the possibility of OLWS gene?

For example - Quarter Horse mare + OLWS Negative Paint Stallion. Chance of OLWS baby?
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Old 07-18-2006, 02:10 PM  
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Some Tobi's have even tested positive from having a non expressive overo link in the way backs.
Agree with the above.

QHs can indeed carry it.
Paint registry started out from QHs who expressed the overo gene and ended up kicked out of the QH registry.
They can have it and just not show it on their hide.
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Old 07-18-2006, 02:14 PM  
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Thanks, I think that answers my question.
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Old 07-18-2006, 02:15 PM  
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palakida, the last page of this document from APHA has some good information:

http://www.apha.com/forms/PDFFiles/g...05ColorGen.pdf
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Old 07-18-2006, 02:29 PM  
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Sorry, not trying to take over the post here but question.... As some know my mare Roxy is half polish arab/ paint. I want to breed her to the solid paint next door for and amazing baby, he makes up for everything Roxy is missing. Rox has not been tested for OLWS, Do I need to worry about the OLWS??? I have no info on her dam and sire.

Her pic is my avatar (spelling?)

Allie
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Old 07-18-2006, 02:31 PM  
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For peace of mind, I would have Roxy tested. Also, find out the information on the stallion too. Just because he appears solid, does not mean he is. I know of several horses that are genetically Overo, but just dont have the white expressed onto their coat.

Brittany
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Old 07-18-2006, 02:40 PM  
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Thanks ThorArb!!! I will do that.


Allie
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