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Sb1, help me see it better

I know sabino most of the time but telling Sb1 apart still has me stumped. I tried looking up pictures of horses that tested positive for sb1 that were heterozygous, but I couldn't find enough information. Does anyone have some pictures of heterozygous sb1 horses maybe to compare to some that tested negative for it?

Threnody Tue, 12/20/2011 - 10:02

I know with me it's mostly looking in the animal's pedigree and parent's colors that makes me think SB1 over other KIT mutations. SB1 and W can mimic each other very closely. So if the horse in question is a breed that has been proven to have SB1 like a TWH that usually makes me determine SB1 as the most likely cause of the white pattern. For an animal of unknown background it could be anything and a test would be needed to determine if SB1 is there or not.

Some people probably have a better eye for it visually alone, but breed and pedigree are what mostly help me.

Pacific Pintos Thu, 01/26/2012 - 19:08

In reply to by Daylene Alford

Here is our herdsire that is tested sb 1.

We also suspect he may also be SW as he has thrown some sw foals, but that could have also come from the mares. We will know more when we get the results of the sw test back.

I will post the results for SW when I get them.

Updated 1/26/12 This horse tested heterozygous SW- 1.

CMhorses Sat, 01/28/2012 - 06:33

Okay so the tested sb1 horses look very much what I would consider to be DW in breeds that do not have sb1. Either way, its just a naming thing for a KIT mutation.

Bannerminis Fri, 02/03/2012 - 11:12

Here is Shimmer who tested positive for SB1

She is homozygous black and heterozygous SB1. Negative for silver and Frame. I am thinking of doing a splash test on her.

[IMG]http://i156.photobucket.com/albums/t35/…]

Her blaze
[IMG]http://i156.photobucket.com/albums/t35/…]

Fresh Clip
[IMG]http://i156.photobucket.com/albums/t35/…]

[IMG]http://i156.photobucket.com/albums/t35/…]

[IMG]http://i156.photobucket.com/albums/t35/…]

Her sire (her dam is solid bay) so SB1 must come from Daddy
[IMG]http://i156.photobucket.com/albums/t35/…]

Here is Sunny (chestnut + flaxen) who tested negative for SB1 and Tobiano but definitely some kind of Sabino going on as he has a lot of ticking through his coat. Another possible contender for the splash test too. Sunny also tested heterozygous for Silver and homozygous for Agouti.

[IMG]http://i156.photobucket.com/albums/t35/…]

[IMG]http://i156.photobucket.com/albums/t35/…]

[IMG]http://i156.photobucket.com/albums/t35/…]

[IMG]http://i156.photobucket.com/albums/t35/…]

Ameria Park Mi… Sun, 02/05/2012 - 02:18

This is my SB1 positive filly, she is a black Sabino

Painted Pastur… Wed, 09/04/2013 - 00:09

I have a mini colt that has been tested by VG labs and he is a SB1/SB1 (2 copies of the Sabinio 1 gene)  Positive for the 2 copies of the SB1 Gene.. He is Homozygous for the Sabinio Gene...Hope that helps everyone!