What is HYPP?? Re FHOTD

chickeninabun

chickeninabun

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I sometimes read Fugle Horse of The Day and it often mentions horses that test postive for HYPP. I believe it is some sort of degenerative muscle disorder, do correct me if I'm wrong, but I haven't heard of it over here. Is it just something that happens in the States? Or to a specific breed, i.e. Quarter Horses??
Any further info greatfully recevied.
x
 
it is a recessive (I think) genetic disorder affecting quarter horses and I think they can be carriers. It is linked with them breeding halter horses up for large muscle mass and I think is linked to problems with the magnesium channels. So basically they bred it in to the animals and could breed it out if they tried.

will try and find you some links
 
Hi there

HYPP is a genetic defect as classified by the American Quarter Horse Association. It does exist in this country.

The HYPP gene traces back to 'Impressive' a notable QH stallion. My horse is classified N/N ie Negative/ Negative this means he does not carry the HYPP Gene. Sadly some owners still continue to breed to known positive Stallions and Mares and therefore the condition has not been eradicated.

As already mention the standard by which horses where originally measured was Impressive, he was a stunning horse of correct conformation and this paved the way for Halter breeders to prefer this type of muscle mass.

This site is excellent and details all you will need to know.

http://www.bringinglighttohypp.org/

Incedentally, what made you ask about HYPP? Just wondered and I hope this helps

Take care

Fe
 
Thanks that's really interesting.
I only ask as it often mention's it on Fugly Horse of the Day's website and I didn't know what it meant. I used to have a QH until she was PTS last year. She was the kindest sweetest little girl I've known (apart from the odd nip whilst rugging up
smirk.gif
) and I loved her dearly. I'd love another QH one day, although I never got mine to do the traditional QH speed, but I think she had underlying problems so that's maybe why
frown.gif
.
Thanks
x
 
Hi all,

Its important to say this. It is NOT just an issue that affects QHs. It affects ANY horse who has ever been crossed with a horse with impressive blood. It was common to breed QH into other lines and as such hypp is also found in Arabs, paints, TB's, appollosa & any horse who has been mixed with a horse with even the tiniest part of impressive bloodline in them. It is not just a QH issue.

It is a dominent not a recessive gene, so it never gets diluted. I.e a 5th generation horse had just as much chance as a 1st generation horse. It all depends on the status of the parents. If a horse isN/N or -ve/-ve in its 2 genes, it is 100% clear and so will its offspring as long as the other parent is N/N too.

There are three testing statuses for HYPP:

H/H This status means that a horse carries a double copy of the defective gene and will pass at least one copy of the gene and the disease to 100% of it's offspring.

N/H This status means that the horse carries one normal gene and one HYPP gene and statistically an N/H horse will pass the gene and the disease to 50% of it's offspring when bred to a N/N or non-Impressive bred horse. N/H to N/H cross will statistically result in 25% N/N progeny, 50% N/H progeny, and 25% H/H progeny.

N/N This status means that the horse carries two normal genes. It does not have the disease, nor can it be passed on.For correct information go to http://www.bringinglighttohypp.org/Index.html as mentioned earlier. the more people who test their horses, the more this will be stamped out.

P.S if anyone has experience of getting a horse tested in the uk - let me know as I'm just buying a QH now.

Regards to all.
 
[ QUOTE ]
it's a genetic defect linked to the halter QH 'Impressive'.

[/ QUOTE ]

Impressive was by the TB stallion Lucky Bar ex Glamour Bars, both his sire and dam had Three Bars within three generations. It seems that most AQHA's, and many APHA's have a 'Bar' somewhere along the line, but only those with Impressive may suffer from HYPP (according to what I have read)

http://www.allbreedpedigree.com/impressive6

One of my QH mares has Impressive 6 generations back on her sire line, but she was still HYPP tested.

I will not be able to register any of her foals with either the APHA if she was bred to a Paint, or to the AQHA unless they are tested (As from 1998, so they are doing something about it, but it doesn't stop the unregistered breeding market) H/H results disqualify a horse from registration.

http://americashorsedaily.com/free-report-hypp-survival-guide/
 
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