What is HYPP ?

Question

I've noticed HYPP and HYPP N/N around a lot lately. What is it ??

Links appreciated.

"I don't know" and "Not sure" are not acceptable answers, 'kay guys ?

Answer 1

This is about the horse who made HYPP famous...

Impressive -was born an Appendix American Quarter Horse, however earned his full AQHA registration in 1971. He was the 1974 World Champion Open Aged halter stallion, the first such World Champion in his breed, despite carrying only 48 halter points in total. He is famous for his highly successful progeny, having sired 2,250 foals. Nearly thirty of his offspring went on to be World Champions themselves.

However, the Impressive bloodline tends to have HYPP {Hyperkalemic Periodic Paralysis}. Impressive was a quarter horse sire that passed on the fatal HYPP gene to some of his foals. He was a champion halter horse but he should not have been bred. This caused the deaths of many young and good horses. Get your horse tested. If he is N/N, he doesn't have the gene. If he is H/N he is a carrier..This might only be possible in females though. Carriers do not express the symptoms but they should not be bred. If he is H/H..see if you can do anything to prevent this disease.http://www.vgl.ucdavis.edu/services/hypp...

is a great website with tons of info on this genetic disorder!

http://en.wikipedia.org/wiki/Hyperkalemi...

Here's what Bill Brewer, AQHA President had to say about it.

http://www.aqha.com/association/registra...

I currently own 3 mares who are Impressive bred but all 3 are N/N.

Answer 2

HYPP is hyperkalemic periodic paralysis. HYPP N/N means the horse does not carry the genes for this genetic disease. HYPP N/H means the horse carries one gene for this disease and will pas it on to 50% of its offspring. HYPP H/H means the horse will pass it on to 100% of its off spring. To be HYPP H/H the horse would have top get a gene from both parents. The disease has been found to stem from the horse Impressive. Here is a link that  that explains HYPP.http://www.hypp.8m.com/whatishypp.html

Horses that are HYPP N/H and HYPP H/H should not be bred.

Answer 3

Hyper (Kalenic?) Periodic Paralysis.  It causes muscle tremors and partial paralysis to muscles.  Severity varies from horse to horse.  In order for a horse to exhibit HYPP, both parents must be carriers of the gene that causes it.  Therefore, hte registration papers for the horse will list the horse as Neg. or Pos., a carrier or not.  By breeding to an HYPP neg. horse, you will not be passing on the disease.  All QH's must be tested for registration.