horse breed testing. - Page 2
   

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horse breed testing.

This is a discussion on horse breed testing. within the Horse Breeds forums, part of the Horse Breeds, Breeding, and Genetics category
  • Testing grade horse breed types
  • Testing for breed of horse

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    02-20-2013, 10:19 AM
  #11
Banned
I haven't researched it thoroughly, but my understanding is that breed testing for dogs is very limited and unreliable, and cannot for example determine breeds out of a mutt, although it can determine the two breeds of a 50-50 cross. I don't know why horses would be any different, so I would suspect it might be effective for verifying a horse is a QH for example, if it is all or almost all QH, but I would be surprised if the test were of benefit for a grade horse with several breeds mixed in, or in the case of Appys, where you have Arab, TB, and QH mixed in plus many other breeds prior to the early 1980's.

I'm just speculating of course, as I said I haven't researched it thoroughly, but I would guess the test would be reliable in some cases, but not in others - particularly the cases where a horse has several breeds in his fairly recent ancestry - say 4 or 5 generations...
     
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    02-20-2013, 11:29 AM
  #12
Trained
Quote:
Originally Posted by Faceman    
I haven't researched it thoroughly, but my understanding is that breed testing for dogs is very limited and unreliable, and cannot for example determine breeds out of a mutt, although it can determine the two breeds of a 50-50 cross. I don't know why horses would be any different, so I would suspect it might be effective for verifying a horse is a QH for example, if it is all or almost all QH, but I would be surprised if the test were of benefit for a grade horse with several breeds mixed in, or in the case of Appys, where you have Arab, TB, and QH mixed in plus many other breeds prior to the early 1980's.

I'm just speculating of course, as I said I haven't researched it thoroughly, but I would guess the test would be reliable in some cases, but not in others - particularly the cases where a horse has several breeds in his fairly recent ancestry - say 4 or 5 generations...
I am guessing it depends on the breed one is testing for. If it had unique markers that have been 100% verified to be breed specific, then the best they could do for a grade is give someone a "percent probability" - which is at least something. Either way, it would require extensive genome mapping to be able to even determine the degree of accuracy for breed "x"...which "they" seem to have embarked on for the dog more than the horse to date. Their priorities are confused, imo.

But I agree w you, for some breeds such as QH's - the number of appendix accepted, as well as the breeds that made the "foundation" would make the certainty pretty darn "iffy", imo. And the spanish mustang "verification" is a little overblown. People want to say their mustang is "an original", but I really doubt the test results some base their claims on says, "100%" probability. I think it is more like, "some percentage less than 60", and the owner reports it as "a done deal".
     
    02-20-2013, 12:52 PM
  #13
Cat
Green Broke
The result set that I saw for a mustang tested gave the top 3 breeds or breed types (one was "true" pony rather than actual breed) that the horse best matched and then said if there were any markers for spanish blood - which this particular horse had some that could indicate spanish blood but not for certain.

I am hoping to do it purely for curiosities sake - even for my grade. I doubt it will tell me he is 50 % this breed 25% this breed and 25% this or whatever. But to get an indication of what looks to be there genetically for $25 I think would be interesting. Plus if I ever decide to try to find a similar horse because I really do like some of his traits - it will at least give me a breed or few to start my search.

I'm quite sure it will not say "This horse is 100% QH" and allow you to registered it as such.
     
    02-20-2013, 12:59 PM
  #14
Yearling
Quote:
Originally Posted by enh817    
... Only way I can wrap my mind around it is if there were a huge database of genetic markers which are characteristic to each breed, against which a horse's genetic code could be compared. But even that doesn't seem plausible with how many different breeds there are and how much variation there is within a breed and how many similarities there are between different breeds...
Exactly. There has to be genetic markers or patterns for individual breeds that will distinguish one breed from another.
Nice research possibility for anybody out there going into genetics??? Good luck getting funding for it, though
     
    02-20-2013, 01:47 PM
  #15
Cat
Green Broke
I guess I don't see it as being that far from impossible. If they can study race horses and have singled out genes that produce larger size, sprinters, horses that prefer dirt track vs. turf, genes that will give you the most likely top contenders, etc - which is research currently being conducted at Kentucky University - why can't they do this?

There is already a huge horse genome project in place that is world wide. Its been in progress for several years now. Its been a couple years since I was at the symposium that had the discussion on it - so I'm sure its grown since.
     

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