10-28-2009, 11:20 AM
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#51 | Super Moderator
Join Date: Apr 2008 Location: USA
Posts: 8,796
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AQHA's HYPP FACT SHEET
• Hyperkalemic periodic paralysis (HYPP) is an inherited disease that leads to uncontrolled muscle twitching or profound muscle weakness, and in severe cases, may lead to collapse and/or death.
• HYPP is listed as a genetic defect in AQHA's rules, along with Parrot Mouth and Cryptorchid conditions.
• To date, HYPP only has been traced to descendants of IMPRESSIVE, #0767246.
• Having negative (N/N) results on file may prevent a horse's offspring from being tested.
• Foals born in 1998 and later and tracing to IMPRESSIVE will have a statement placed on their Certificates of Registration that recommends testing for the condition unless test results indicating the foal is negative (N/N) are on file with AQHA.
• AQHA will test any foals who are required to be parentage verified and who trace to IMPRESSIVE for HYPP prior to them being registered. This testing will be performed with the same DNA sample submitted to the laboratory for parentage verification.
• AQHA will accept HYPP test results only if performed through a licensed laboratory. These currently include:
Veterinary Genetics Lab at University of California at Davis
Shelterwood Laboratory at Carthage, Texas
Vita-Tech Canada Inc., Markham, Ontario
NSW Agriculture in Australia
Veterinary Diagonostics Center, Fairfield, Ohio, (800) 625-0874
Stormont Labs, Woodland, California, (916) 661-3078
Gene Check, Inc., Ft. Collins, Colorado, (940) 472-9951
Maxxam Laboratory at Guelph, Ontario
Other laboratories are in the process of being licensed.
• Beginning with the 2007 foals, all 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.
• Possible results of HYPP testing are N/N, N/H and H/H.
HYPP is inherited as a dominant trait, which means a heterozygous (N/H) stallion or mare bred to a normal (N/N) horse will result in approximately half of the offspring being affected and half being normal. The rare homozygote (H/H) usually is severely affected with the disease and will pass the gene to its offspring 100 percent of the time.
•HYPP can be treated through diet and medication in most cases.
• AQHA Testing Kits can be ordered for $40. | 
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10-28-2009, 11:43 AM
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#52 | Super Moderator
Join Date: Jan 2009
Posts: 1,116
Horses: 0 |
Quote:
Originally Posted by farmpony84  It is linked directly to Impressive and only to Impressive.
I copied this info directly from the AQHA site for those interested.  A LETTER FROM BILL BREWER
Dear American Quarter Horse Enthusiast,
For some time now, you have probably heard, or had first-hand knowledge, of the condition known as hyperkalemic periodic paralysis (HYPP). This condition is characterized by intermittent episodes of muscle tremors (shaking or trembling, weaknesses and/or collapse).
At the 1996 AQHA Convention in Seattle, Washington, the AQHA Board of Directors approved some rules recommended by the AQHA Stud Book and Registration Committee and approved by the Board of Directors. Among the changes was a rule requiring disclosure of HYPP status on the registration certificates of foals born on or after January 1, 1998, which descend from any bloodline determined to carry the HYPP gene.
Beginning with the 1997 AQHA Official Handbook, HYPP is in rule 205 among conditions commonly considered undesirable traits or genetic defects, such as parrot mouth and cryptorchidism. These conditions do not prevent a horse from being used as breeding stock or from participating in AQHA-approved events, subject to rules of the individual event.
Beginning with 1998 foals, the rule requires the following notification to be placed on the registration certificates of foals descending from any bloodline determined to carry the HYPP gene:
"This horse has an ancestor known to carry HYPP, designated under AQHA rules as a genetic defect, AQHA recommends testing to confirm presence or absence of this gene."
Facts about HYPP have been gained through research projects funded in part by AQHA, through the University of California, Davis and the University of Pennsylvania. The first report, from Drs. Sharon Spier and Gary Carlson of U.C. Davis, was delivered to AQHA in the summer 1992, and published in-full in the September 1992 issue of The Quarter Horse Journal. As additional information has been made available, AQHA has promptly published it. I invite you to refer to [the Publications] page for a list of AQHA publications and others which contain information about HYPP.
AQHA has a duty to its members and American Quarter Horse owners to keep them abreast of current information on HYPP, and indeed, all health matters, so that they may make informed decisions concerning their equine programs.
Respectfully,
Bill Brewer
AQHA Executive Vice President | Yes I know the question was posted to the person who said that Impressive was not the only horse with HyPP any more. I want to know where they got this info and what other horses have HyPP. | |
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10-29-2009, 01:52 AM
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#53 | Trained
Join Date: Jul 2008 Location: Soon to be back in Higgins. :D
Posts: 5,111
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I personally love the Impressive line. I don't like the horses who are built like pit-bulls (of any lineage) but the original Impressive lines, the ones bred for using, are the ones that I love. I have a grandson of Impressive that was a phenomenal roping horse and he also won points in WP, reining, and halter. However, he also had the more "using friendly" build; big but not bulky. Much of this was due to his mom and the build that she got from Hy Diamond (her grandsire). Every Impressive horse that I have ever been around was an easily trained, level headed, nice to ride horse.
I am with Farmpony, I hate to see people remember such a magnificent stud for something that he had absolutely no control over. It is not his fault that he was the progenator of a terrible disease. I thoroughly hate when people say that "I hate Impressive bred horses because of HYPP". There are just as many Impressive horses out there that are N/N as there are positive ones. That would be like saying that I hate Greg Louganis because he had HIV and it didn't matter that he won back to back Olympic titles.
Hate the disease and those that enable it, don't hate the ones who carry it from no fault of their own. | |
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10-29-2009, 08:49 AM
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#54 | Foal
Join Date: Jun 2009 Location: Kentucky
Posts: 188
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There is no other line that has HYPP. It was a genetic defect in Impressive, therefore, no horse without him in their lineage will have HYPP. Its not possible.
•HYPP can be treated through diet and medication in most cases.
I really like that this point is mentioned. It is absolutely true. I have had two N/H horses and neither was ever on pills and neither has had an attack. I was never concerned about taking either horse anywhere (shows, etc) because they were not any trouble. They were pictures of health. Strong, good footed, and sound. Neither horse ever shook, seized, or had tremors. | |
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10-29-2009, 09:48 PM
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#55 | Weanling
Join Date: Sep 2009 Location: Santa Monica CA (horse is in Agoura Hills)
Posts: 382
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I know about HYPP, but I alway wondered... Why was the Impressive line THE ONLY ONE to ever have it? How'd he get it?! Are there other horses that HAVE the illness just not QH's? I understand it's a genetic disease and all, but I am just wondering how it all started... I just realized I never knew Impressive was the only QH with it. | |
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10-29-2009, 10:08 PM
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#56 | Weanling
Join Date: Feb 2009 Location: Middle Tennessee
Posts: 486
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I don't like the ones that look like pit-bulls as stated earlier. They are so....gross...its just unnatural. | |
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10-29-2009, 10:21 PM
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#57 | Super Moderator
Join Date: Jan 2009
Posts: 1,116
Horses: 0 |
It is a genetic mutation. They happen all the time every time it splits and reproduces itself there is a chance of a mutation a chance they will not line up correctly. That is the simple answer it is obviously more complicated but I do not feel like getting into all of that. However most of them you would never know or see. It just happens that this one happen is such a way that it only takes 1 copy to present itself and with 2 copys makes it worse. | |
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10-29-2009, 11:11 PM
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#58 | Foal
Join Date: May 2009 Location: Indiana
Posts: 188
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I was told when I bought Kay that she is a granddaughter to Impressive. Also, my Aunt has a gelding from the Impressive line. Alot of horses around the Indiana, Ohio, Kentucky area are out of this line. (So I've heard) | |
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10-31-2009, 12:32 PM
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#59 | Chat Moderator
Join Date: Aug 2008 Location: western Kentucky
Posts: 3,767
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Quote:
Originally Posted by redneckprincess70 I was told when I bought Kay that she is a granddaughter to Impressive. Also, my Aunt has a gelding from the Impressive line. Alot of horses around the Indiana, Ohio, Kentucky area are out of this line. (So I've heard) |
All you have to do is look at the studs horses adds in Kentucky to confirm that. | |
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10-31-2009, 01:32 PM
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#60 | Weanling
Join Date: Sep 2009 Location: Santa Monica CA (horse is in Agoura Hills)
Posts: 382
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Well if it's a genetic mutation, why is Impressive's line the only one to ever have it? In all the years and horses that have been bred in AQHA, and even APHA, how is it that we've never labeled another stallion as "the carrier" of it? Have other lines had it?
Sorry if I am not making myself clear, I don't know how to really phrase it I guess! | |
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