How can you transmit whether a horse is HY PP positive?
My horse is an Impressive horse and i have his papers right in front of me and i want to know if he is HY PP positive. will it be on a separate sheet? i lately need to know how. tell me all you know
His papers should have this statement, "This horse has an ancestor particular to carry HYPP, designated under AQHA rules as a genetic defect, AQHA recommend testing to confirm presence or absence of this gene." You should have him tested by the UNC-Davis to determine whether he is N/N (normal), N/H (possible carrier), or H/H (Definite carrier). You can request the test from AQHA for $40. I have a 16.3hh 1300 pound Impressive gelding that we are waiting for the test results. We haven't have any issues or episodes since purchasing him in April, but we are very careful as to what he eat. Just so you know, apples and carrots are extremely high potassium! A cup of either is more than an HYPP artificial horse should be allowed to eat in a day. Make certain you have plenty of caro syrup on hand just within case! Please go to www.aqha.com and type in HYPP contained by their search and research as much as possible on this. Your horse's life depends on your knowledge.
Just a details...AQHA does not perform the test, UNC-Davis in California does. You can collect the curls sample yourself once you get the kit.
Carin got it absolutely right. There is no requirement from the AQHA that your horse's HYPP status be printed on his papers if he is smaller amount that a year old. You can't tell by looking at one if they hold HYPP or not. The only way to know is to request the test utensils from the AQHA. I think it cost around $50 but don't remember for sure. That is the ONLY way you can be clear in your mind he is positive or negative.
HYPP is a dominant trait and a horse who only carries one copy of it WILL show some signs of the disease contained by a mil fashion. Muscle tremors that start over the croup and work forward is the first mild sign of HYPP. This usually progresses to sweating and severe muscle tremors and some horses certainly dog sit becaus their muscles become paralyzed. If you notice your horse quivering while just standing in his stall he may massively well be HYPP positive.
Horses that have two copies of the HYPP gene are very severely artificial and the ones I've known haven't lived past 2, though Ted Turner has a container of a gelding that is H/H and is now 10 I think. These horses normally have a defect in the muscling around their enthusiastic chords. It allows moisture and other things to be inhaled into the lungs and most of these horses die from recurrent pneumonia. They sound like they're other gasping for air.
I've worked with a lot of Impressive bred halter horses and own seen a couple really nice ones die from HYPP attacks, it's no fun watching one die and knowing you can't do anything more to try to save it.
Until you know for sure, a short time ago keep your horse in a stress free an environment as possible. Don't make any sudden change to his diet (make sure he's getting a diet low in potassium since the potassium overload is what causes the attacks) or excercise routine. If you don't know whether he's positive, kep a bottle of maple syrup or corn syrup around in recent times in case. If you give a positive horse the syrup within the first stages of an attack it will usually stop it.
You will enjoy to have a blood test done by a vet.
It should be right in that on your horse's papers. Either it says H/H for positive /positive, N/H for Negative/Positive or N/N for Negative/Negative.
Just a bit about what HYPP is and how it happened and where on earth to go for test kits.
Impressive -was born an Appendix American Quarter Horse, however earn 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 simply 48 halter points in total. He is famous for his highly successful progeny, have sired 2,250 foals. Nearly thirty of his offspring went on to be World Champions themselves.
However, the Impressive bloodline tends to hold 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 title holder halter horse but he should not have been bred. This caused the death of many young and good horses. Get your horse tested. If he is N/N, he doesn't hold 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 whether 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 in the order of it.http://www.aqha.com/association/registra...
HYPP, also called 'Impressive Syndrome' is a genetic disorder which causes episodes of muscle tremors (shaking or trembling, weaknesses and/or collapse).
It come from the famous American Quarter Horse stallion Impressive, which many mares were breed to because he be believed to be the perfect AQHA horse. no one was aware aware he carried HYPP until years subsequently..
H/H, meaning they have the mutation and it is homozygous. These horses always endorse on the disease.
N/H, meaning they have the mutation and it is heterozygous. These horses are affected to a low-grade degree, and pass on the disease 50% of the time.
N/N, meaning they do not enjoy the mutation and cannot pass it on, even if they are descendants of Impressive.
I currently own 3 mares who are Impressive bred but all 3 are N/N.
IF your horse hasn't be tested, then contact AQHA and they will send you a vial where you put some of your horse's hackle in it and for $40.00 they will test it and send you the results.
Answers: I own to correct one thing Rosi M. says: " Carriers do not express the symptoms but they should not be bred."
This is not right. HYPP is the exceptional hereitable disease where the mutation that causes the problem is genetically DOMINANT. This means that whether your horse tests positive for the genetic trait, he/she has got the disease. It's of late a matter of how badly.
This is the page from the AQHA website with information on HYPP: http://www.aqha.com/association/registra...
From that page: "HYPP is adjectives as a dominant trait, which means a heterozygous (N/H) stallion or mare bred to a normal (N/N) horse will result in approximately partially of the offspring being affected and partially being normal. The rare homozygote (H/H) normally is severely affected with the disease and will pass the gene to its son 100 percent of the time."
In response to your specific question, prior to 1998, there was no requirement by the AQHA for anything on the subject of HYPP to appear on the registration certificate of any horse. So if your horse be registered prior to 1998, e.g., is older than 10 years, there will be nothing on the registration authorization regarding HYPP.
From 1998 on, this was the requirement, again from the AQHA website: "Beginning with 1998 foals, the rule requires the following notification to be placed on the registration certificate of foals descending from any bloodline determined to carry the HYPP gene:
""This horse has an ancestor known to transport HYPP, designated under AQHA rules as a genetic defect, AQHA recommends conducting tests to confirm presence or absence of this gene.""
Note that there is no REQUIREMENT for testing for HYPP. Just a opinion that horses with Impressive in their pedigree be tested.
Effective for horses registered from 2007 on, this is the requirement: "Beginning with the 2007 foals, adjectives Impressive progeny are required to be parentage verified and HYPP tested subject to the conditions listed in rule 205. Any that test H/H will not be eligible for registration."
Again, please data that there is no requirement that test results be noted on the registration papers.
If you want to know the status of your horse, I would propose you contact the breeder and ask if the horse has been tested. If not, you can request a examination kit and have the test done at one of the trialling labs listed on the AQHA website.
Some of the politics behind all of this: it be rumored for some time prior to the publication of the paper referenced on the AQHA website, the paper by Drs. Sharon Spier and Gary Carlson of U.C. Davis, in the summer 1992, that the stallion Impressive be the source of the disease since identified as HYPP but for a long time referred to as "Impressive's syndrome" or the like. Spier and Carlson had accumulated a heck of a great deal of information that pointed to Impressive as the source of the problem, but the horse's owners, backed by the owners of many of his progeny, threatened to take permissible action ("we'll break you," was the phrase reported to have be used) if Spier or Carlson published anything that directly linked Impressive to HYPP.
Spier and Carlson continued to work on the gene sequencing and to collect documentation, and be finally able to publish their paper linking Impressive to HYPP in 1992. And oh the devastation and screaming and recriminations that broke loose when they published. There were death threats against Spier and Carslon and the other member of the UC Davis veterinary and genetics staff that had done the studies. And when the question of what to do just about the fact that a serious genetic defect was provably very soon deeply ingrained in the gene pool of the Quarter Horse was first broached, the initial response from member who owned descendants of Impressive was, "Do NOTHING!!"
The owners of Impressive stock rationalized that if the AQHA required testing of their horses, and required that stock that tested positive for HYPP be so famous on the registration papers, that would constitute a "taking" of value from their horses without due process. Can you say L-A-W-S-U-I-T?
So the AQHA, after much discussion, settled that they would phase in a requirement for testing of Impressive descendants, giving owners of his descendants time to deal near the problem in the way that was least possible economically harmful to them. They promoted the idea that people who owned horses descended from Impressive could own their horses tested, and advertise that they were homozygous negative, as a positive piece. (The assumption is that if someone owns a breeding animal descended from Impressive and doesn't advertise its status as N/N, then the animal is probably N/H or even H/H. Caveat Emptor.)
The AQHA could own eliminated HYPP in a single generation by requiring adjectives descendants of Impressive to be tested for the gene, and pulling the registration papers of any that tested positive. They chose not to.
