Homozygous question! - Page 2 - The Horse Forum
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post #11 of 25 Old 07-08-2012, 06:20 PM Thread Starter
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I always wondered if Gunner was homozygous, since most of his goals seem to have the same markings as him. Or at leat from what I have noticed.
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post #12 of 25 Old 07-09-2012, 12:55 PM
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Somebody I know said that max white sabinos are homo, and 'regular' sabinos are always heterozygous? I didn't think it was true, but there is a possibility it could be true. I don't think so.

I think with overos (broadly speaking), you have to have them tested to know for sure.
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post #13 of 25 Old 07-09-2012, 12:59 PM
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The problem is that sabino has only had one type isolated for testing, and lots of horses with a sabino phenotype have tested negative for sabino 1, which is the only testable one. The same goes for splash - the test has been out only a few months but already there are lots of horses with splash-eque markings that have tested negative.
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post #14 of 25 Old 07-09-2012, 01:00 PM Thread Starter
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So are there different strains of each of those??

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post #15 of 25 Old 07-09-2012, 01:16 PM
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Originally Posted by MangoRoX87 View Post
So are there different strains of each of those??
Yes. Currently there is only a test for Sabino 1, and for Splash 1, 2 and 3.
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post #16 of 25 Old 07-09-2012, 01:17 PM
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Originally Posted by MangoRoX87 View Post
I always wondered if Gunner was homozygous, since most of his goals seem to have the same markings as him. Or at leat from what I have noticed.
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I don't think he would be. If I recall correctly, his line is splash white 2 (I think) which is theorised to be embryonic lethal homozygous.
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post #17 of 25 Old 07-09-2012, 01:49 PM
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Originally Posted by Chiilaa View Post
The problem is that sabino has only had one type isolated for testing, and lots of horses with a sabino phenotype have tested negative for sabino 1, which is the only testable one. The same goes for splash - the test has been out only a few months but already there are lots of horses with splash-eque markings that have tested negative.
I have always wondered about this to myself- are there different types of sabino, because there is so much variation in horses that are sabino; the 'sabino roan' commonly seen in clydes, and the crisper jagged belly and face markings type ect.
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post #18 of 25 Old 07-09-2012, 07:54 PM
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Originally Posted by TexanFreedom View Post
I have always wondered about this to myself- are there different types of sabino, because there is so much variation in horses that are sabino; the 'sabino roan' commonly seen in clydes, and the crisper jagged belly and face markings type ect.
A lot of people who have done a fair bit of research, and others like me who feed on their research, are leaning towards Clydesdales being dominant white rather than sabino. The markings are just too crisp and flaky. That's the only way I can describe it - dominant white markings are crisp and flaky lol.

There are definitely different types of sabino though. There are plenty of horse that have tested negative for sabino 1 but still display sabino markings. Sabino 1 seems to be only in certain breeds (I can't name them off the top of my head, will come back to this thread later today).
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post #19 of 25 Old 07-10-2012, 10:04 AM
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That's really cool.
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post #20 of 25 Old 07-10-2012, 10:16 AM
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ok, can someone please help me out with embryonic lethal homozygous? Tried looking it up but need someone to put it in a language I can understand or at least a good website to reference!!!
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