Dapple grey/grey question - The Horse Forum
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post #1 of 40 Old 05-31-2016, 11:01 AM Thread Starter
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Dapple grey/grey question

My bay filly's sire was a dapple grey shire.
Her mare is a black/blue roan.
How come the filly is bay and not greying out? She's a yearling now, no signs of greying at all!


Photos of mare and foal - photos of sire are on my p/c, I'll post later
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post #2 of 40 Old 05-31-2016, 11:17 AM
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Although one parent must be grey for the resulting foal to be grey, it does not guarantee that the foal will be grey. Looks like your filly has inherited her color from her dam line, not the sire. There are a whole bunch of color genetic experts on this forum who can explain the genetics of color in a lot more detail than I.
I'm sure they'll show up shortly.
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post #3 of 40 Old 05-31-2016, 11:58 AM Thread Starter
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Thanks for that! For some reason I thought all offspring from a grey parent ended up being grey! Thought maybe there was a difference in a dappled grey and a grey grey :)

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post #4 of 40 Old 05-31-2016, 11:59 AM Thread Starter
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Also, mare had a foal by same sire who was also a bay. So I'm guessing Martha is little miss dominant in the genes department?!

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post #5 of 40 Old 05-31-2016, 12:12 PM
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As the shire sire has non gray offspring he only has one copy of the gene. Gray is not his base color - it is a depigmentation of his base color which may have been bay or black. As you said the dam was black that makes bay his base as your horse had to get the agouti from somewhere unless the horse in the pics is a faded black. For some reason the pics aren't clear. With a roan dam that has has non roan offspring she only has one copy of roan to pass. You had a 50/50 chance of getting gray from the sire and a 50/50 chance of roan from the dam. You could have also ended up with both roan and gray. Dappling is an intermediate stage of graying and not all horses that are gray will dapple from the gray. It is caused by darker base color ringing areas of hair that is heavier with white. Horses can also dapple with or without the gray gene from good condition. Both roan and gray will show with only one copy of the gene but for it to be guaranteed to be passed from parent to offspring one of the parents had to have two copies meaning one would automatically be passed. I think I am seeing white hairs in the second pic so it may be that roan was passed.

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post #6 of 40 Old 05-31-2016, 12:12 PM
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If you're wondering where the bay has come from, is it possible that the sire was bay before greying out? If his 'base colour' was bay then he could've just passed on the bay without the grey over the top.
As far as dappled grey and grey-grey go, a dappled grey is just a grey horse that hasn't completely greyed out yet. All dapple greys will turn grey-grey eventually, but not all grey-greys were once dappled grey if you see what I mean
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post #7 of 40 Old 05-31-2016, 12:23 PM Thread Starter
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So I've been told that the mare is a black but I think she is blue roan simply because she has brown marks on her mussel.
I'm bringing her home tomorrow so will take some better photos :)


Thanks for clearing it up about the greys! I honestly thought dappled was a different colour all together!

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post #8 of 40 Old 05-31-2016, 12:25 PM
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Now I see it is two different horses. Black clyde faded and roaning in second pic and last is the foal that does look to be bay with a lot of fading as well. A brown mark on her muzzle does not make her blue roan - the white hairs across her body would. The brown on the muzzle and in the soft points would mean brown/bay with roaning. It would also mean baby could have gotten agouti from the mother.
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post #9 of 40 Old 05-31-2016, 12:28 PM Thread Starter
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The first 2 photos are the same mare :) the foal is her second foal

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post #10 of 40 Old 05-31-2016, 12:30 PM Thread Starter
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So she's brown? Do I need to start another thread on her?! I had a thread on her and the general consensus was she was black. However, a friend of mine has a blue roan and Martha looks the same colour....
Horses are such problems

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