HYPP in horses

[welsummerchicks]

Red hair?

Mutations are going on all the time.

In fact, even identical twins are not identical. After the egg divides into two, the mutations start. That's why identical twins don't all get the same illnesses.

 

[babyblue]

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yup, my sister and I are as identical as you can get. Im still 4 inches taller then her.

 

[EweSheep]

Went and took a look at Impressive's pedigree...why, he has alot of TB blood in him and he does not look like the Foundation QH like Poco Bueno, etc. No wonder it was the mutation. Would he be 7/8 or 15/16th TB?

I dont know if he had any brothers and sisters that looked like him and if they do carry that disease.

 

[patandchickens]

AFAIK the consensus is that (from pedigree analysis) the mutation probably arose with Impressive, although you can't rule out it having occurred one or more generations back and just luck-of-the-draw having made it only passed on thru Impressive.

Apparently it occurs in other breeds too, just has not become institutionalized/widespread in them the way it has in QHs (and by extension any of the other breeds with major QH contribution to their gene pool). (As independant origins of the mutation, I mean, not having anything to do with Impressive or QHs at all)

Pat

 

[welsummerchicks]

"I'm 4 inches taller"

You might be a semi-identical twin. There is a little-known fact that there are two different degrees of identical twin: 1.) 'More identical', 2.) 'Less identical, but not as unidentical as fraternal twins'.

....<Impressive pedigree as a lot of Thb....>...."No wonder it was the mutation. "

You think the HYPP mutation has anything to do with him having Thoroughbred blood? Mutations are just - mutations, they have nothing to do with crossing, outcrossing, etc. They are random events (well, unless you get radiated a lot) that can occur in any creature. Mutations can be non-beneficial, beneficial, neutral, or almost neutral.

They don't go looking for Thoroughbreds or Thoroughbred-Quarter Horses. They happen all the time no matter what blood lines are involved. They are just as possible in a foundation Quarter Horse as anything else. The gene also happens to cause heavier muscle - that's why Impressive was so...impressive. Or why people said, 'Well, PSHAW! Who cares if they all fall over? They sure have nice muscles!!!'

And there are mutations that are like...'Well...you'll NEVER get malaria, isn't that great...but...uh...there is this sickle cell anemia thing....'

 

[RabbitMage]

You also have genetic diseases like SCID in Arabs and HERDA in Quarter Horses (unrelated to Impressive). They can crop up anywhere.

 

[EweSheep]

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Never heard of them!

 

[RabbitMage]

I remember being a kid and reading horse magazines and seeing Arab studs advertised as "SCID clear". If I remember right, it's an immune disorder.

HERDA was found more recently in...cutting horse lines, I think? It messes with the connective tissue...basically any pressure on the horses' skin causes it to tear, split, and sluff off. A lot of owners don't realize their horses have it until they go to saddle train them, and the rubbing and pressure of the saddle tears the skin.

 

[EweSheep]

Both of the diseases are new to me....it shows that I've been out of the horse world too long!

 

[Bunnylady]

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The connection between Poco Bueno and HERDA:

http://www.bringinglighttohypp.org/HERDA.html