TB Mare. Sabino? - The Horse Forum
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post #1 of 8 Old 09-12-2020, 07:57 PM Thread Starter
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TB Mare. Sabino?

Hi everyone!

I just bought this mare and I'm pretty confident that she's a minimally marked sabino. If I recall correctly, SB1 doesn't exist in thoroughbreds. All of her white markings are pictured. No belly spots, but her RH sock has a chestnut spot inside of it. She's by K One King and out of Hot N' Dusty, neither of whom seem remarkably sabino.

I'm going to have her DNA tested for white patterns but I'm curious to hear what you all think. Photos of sire and dam are included too.

:)
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post #2 of 8 Old 09-13-2020, 09:33 AM
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Considering that the Sabino1 gene does not apparently exist in TBs (although a similar pattern does), neither parent shows any sign of it, and your mare's markings are not typical sabino (for example, roaning at the edges of white markings), I would guess that you don't have a horse with sabino, but a horse with an unusual stocking.

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post #3 of 8 Old 09-13-2020, 12:27 PM
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Usually ermine spots on the legs are smaller. On the face they are called occluded spots. Cat tracks in body white. All are exclusions where the white pattern did not fully express.

There are many white patterns that are still not testable. You may come up with genes that are responsible for white but they may not be the gene responsible for the white on your horse.

I have a line of QH that all have ermine spots. Black on the bays, palomino on the palominos. The dam of my original stallion was a chestnut with chestnut colored ones. Not quite so big as that one but they all have several.

Some horse people change their horse, they change their tack and discipline, they change their instructor; they never change themselves.

Last edited by QtrBel; 09-13-2020 at 12:32 PM.
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post #4 of 8 Old 09-13-2020, 01:49 PM
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Not trying to disagree with anyone, because I am not a color expert at all.....just trying to learn! But I thought that white on the bottom lip was a characteristic of sabino?


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post #5 of 8 Old 09-13-2020, 09:30 PM
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W20 seems likely. It tends to give a white blaze and stockings. If your horse has a blaze and one or more socks, or perhaps a few white belly spots that have not been explained by other white marking genes, test for W20 as well as sabino 1.
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post #6 of 8 Old 09-14-2020, 06:06 AM
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Often those that carry it have white on the lower lip or chin, but TBs do not carry sabino (SB1).

Some horse people change their horse, they change their tack and discipline, they change their instructor; they never change themselves.
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post #7 of 8 Old 09-14-2020, 11:08 AM
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Thoroughbreds don't carry sabino, you're right. It's likely she's W20 (common in TBs and in its homozygous form, it can express with a white blaze and stockings). Heterozygous W20 doesn't have much of an effect - it's a white booster, not a white creator, so if the horse has another white pattern it'll make that pattern louder, but on its own you'll see normal white markings and nothing more.

It's possible both her parents are heterozygous W20 and she ended up homozygous.

MAKORA THOROUGHBRED SPORTHORSES
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post #8 of 8 Old 09-14-2020, 08:35 PM Thread Starter
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Thanks everybody who responded. I'm probably going to have her tested later on this year, so I'll share her results when I do.

I hadn't heard of an occluded blaze or occluded spots before I did some digging online. It creates some interesting markings and I'm thinking that's what I'm partially seeing in her blaze.
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