Homozygous Grey vs Heterozygous Grey <PIC heavy> - Page 2 - The Horse Forum
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post #11 of 28 Old 01-15-2012, 12:58 AM
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Again, the link seems to be that heterozygous grey horses have a tendency to have more flea bites. HOWEVER. The study was very broad, and the results were a trend, not a rule. Add onto that - through my own observations, I feel that Arabs are more inclined to be fleabitten than a lot of other breeds.

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post #12 of 28 Old 01-15-2012, 01:22 AM Thread Starter
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^^^ thank you. I wonder if there is a genetic marker that leads horses to be flea bitten? Not that it has been uncovered as of yet LOL
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post #13 of 28 Old 01-15-2012, 01:36 AM Thread Starter
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I just double checked the pedigree of my cousin's very fleabitten grey arabian, and she is also a heterozygous grey. So, maybe the heterozygous grey crossbreeds of arabians are less likely to become fleabitten than the heterozygous purebreds?
I wonder if that can be tested?
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post #14 of 28 Old 01-15-2012, 07:32 AM
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I still think there is something in in Arabs that encourages fleabitten greys But, unfortunately, it won't be something we find in a hurry. To be able to test it, they would have to isolate the part of the DNA code that controls it, and then test for it in a variety of horses. While I would love to see this, I would love to see plenty of other tests long before this one
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post #15 of 28 Old 01-15-2012, 09:02 AM
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Interesting thread. I'm waiting for results of my grey mare's test. The first grey on our farm (other than outside mares) in 30 years. She is 10, still pretty dark and not fleabitten. Got my fingers crossed she's homozygous, take the guess work out of it when registering her foals lol! Her first, my weanling, is bay going grey.
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post #16 of 28 Old 01-15-2012, 09:15 AM
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I know very little about color genetics. All I know is that the stallion in my avatar was homozygous. I started working with him at age seven and he was already pretty white. His foals were greys of every color possible of grey.
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post #17 of 28 Old 01-18-2012, 09:58 AM
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I find this quite interesting:) Rosie is heterozygous, she has had one sorrel filly and one grey colt. She has been fleabitten for...gah...nearly ten years I think. I saw a picture of her as a 4/5 year old, and she was a dappled..

I'm thinking Dream is homozygous. She is fleabitten on top of the dapples. She was bred to a roan, and we got Sassy, who nobody seems to think is a grey O.o
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post #18 of 28 Old 01-18-2012, 10:28 AM
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Rocket is fleabiten gray, her mom was gray and her dad was black and white paint. shes 8yo and almost all white.

this is a few years ago



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post #19 of 28 Old 01-18-2012, 01:57 PM
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Baby in 2009 at 10 years old...


and in 2010
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post #20 of 28 Old 01-18-2012, 02:14 PM
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Betting that leopard foal greyed out as well... Sad to have such a wonderful pattern disappear like that.
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