(no subject)

[Joane Pappas White <Lyoness@Castlenet.com>]

Hi,

In response to your question on tying up:

"Joane - you've mentioned 1/4 horses in a couple of posts as having 
different.  what all can you share on 1/4s? "

My answer, and I sure would love to hear from the experts here:

It took me a while to find my old magazines but in the March 1999 Equis,
there is an article on Tying Up. The article relates the latest research
of Stephanie Valberg, DVM and Beth Valentine, DVM.  

The research of Valberg reviewed the pedigrees of 23 quarter horses and
came to the conclusion that two stallions figured "prominently in the
pedigrees of the horses and the computer analysis identified a third
stallion from whom the other two were directly descended. We can't say
difinitively whether it's a dominant or recessive trait, but it's very
clear to me (Valberg) that PSSM is an inherited trait in the Quarter
Horse". Valberg says that tying up in Quarter horses is due to poly
saccharide storage myopathy.  

The lastest research done by Valberg on TB's showed four stallions in
the pedigree of 64 TB's with recurrent tying up syndrome (RER).



Given the above, and then reviewing the information on Susan
Garlinghouse's website as to causes of tying up, I would suspect that
some recurrent tying up problems in Arabs may have a genetic component.

Joane and the Herd
Price, Utah
Lyoness@Castlenet.com