Foal Colour?? - The Horse Forum
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post #1 of 21 Old 10-07-2012, 04:20 PM Thread Starter
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Foal Colour??

Hi there...I have a 3yr old sorrel/white Tobiano APHA maiden mare who was bred to a dun AQHA stallion(with the black zebra stripes on legs...) anyone have a simular combo? And any guesses what the colour of the foal will be?
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post #2 of 21 Old 10-07-2012, 05:30 PM
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A sorrel with a dun (assuming you mean bay dun) can produce: Bay, Bay dun, Chestnut/sorrel or chestnut dun. Has the stud been tested for how many black genes he has? If he's got 2 you'll get either a bay or a bay dun, if he has 2 dun genes you'll get a bay dun or a chestnut dun. It depends alot how many of each gene the stallion has, the sorrel mare can't add much to the foal only really take away. Unless she's got silver somewhere in her ancestry?
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post #3 of 21 Old 10-07-2012, 07:48 PM
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Black and grullo are also possibilities as long as neither the sire nor dam are homozygous for agouti.
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post #4 of 21 Old 10-07-2012, 10:35 PM
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Originally Posted by PunksTank View Post
It depends alot how many of each gene the stallion has, the sorrel mare can't add much to the foal only really take away. Unless she's got silver somewhere in her ancestry?
1) Silver is very rare in stock breeds, so I wouldn't count on it.

2) I'm not sure what you mean by "take away from the foal." Chestnut is homozygous red, which means the mare will absolutely pass it on to her foal. Also, because she is red, she could carry the agouti gene unbeknownst to us.

But, as stated in those to posts: Bay, black, chestnut, red dun, bay dun, grullo.
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post #5 of 21 Old 10-08-2012, 09:16 AM
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Sorry what I meant by chestnut's taking genes away is that they can hide so much if the black gene doesn't carry on. Pretty much only cream and dun are the only dilutions that actually show up on them. So unless the dun carries on the black gene the chestnut is 'taking away' the other genes, by hiding them. Sorry for the choice of words.
Cool to know about the silver gene in stocks, I didn't take breed into consideration, thanks.
Yes, black and grullo are possible but I doubt it, most chestnuts carry at least one agouti gene, and him being a bay dun leads me to believe he does too - so while it's possible, I doubt it'll happen.
I think chestnut, bay, bay dun and chestnut dun are the most likely outcomes. With black and grullo being very rarely likely.
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post #6 of 21 Old 10-08-2012, 09:26 AM
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We're not even sure if the sire is bay dun or not. No pictures and the OP hasn't been back to this thread to confirm one way or another...
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post #7 of 21 Old 10-08-2012, 09:45 AM
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good point :P
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post #8 of 21 Old 10-08-2012, 10:52 AM Thread Starter
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yes..sire is bay dun..he has not been tested as far as I know...lots of interesting guesses here...this is our first foal...was kinda hoping he/she would be a paint...as mare is tobiano...
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post #9 of 21 Old 10-08-2012, 10:53 AM
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If you had pictures of both sire and dam we could have far more educated guesses.

Mods, grant me the serenity to see the opinions I cannot change, courage to change the ones that should change, and the wisdom to spot the trolls.
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post #10 of 21 Old 10-08-2012, 12:47 PM
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If the mare is homozygous for tobiano, she will pass it on. If she's heterozygous, then she has a 50% chance of passing it on.

If both of her parents were tobiano, there's a chance she's homozygous. Otherwise she's definitely heterozygous.
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