White covering grey gene???

[Tap The Mint]

I have an interesting topic I think. We bred our bay Sabino mare to The White Fox and got a beautiful chestnut colt with four white stockings. I noticed when he was first born that he had a 'sparkly' appearance and white hairs around his eyes and nostrils. He is now just a little over a month old and showing grey hair on his eyelids and nose and face so is obviously 'greying out'. I don't know if The White Fox has any other grey foals but I'm thinking that the grey could be carried through his dam, Patchen Beauty (white) by Hatchet Man (grey). Does this mean that the white color overrides the grey and could this colt theoretically throw white foals in the future? Jorge, your thoughts please!

[accphotography]

For some reason I SERIOUSLY doubt Patchen Beauty is gray. But yes, white does override gray.

[Truly]

I'd never have thought of that!
Unless you tested for grey, how would you know if the grey gene had been passed if the foal was born white?
There'd be no pigment to grey out!

[accphotography]

You wouldn't except for solid foals of said horses graying out, which I haven't seen from the Patchen line at all. I would test the OP's foal if it were mine.

[Jorge]

At some point during her development, Iroquois Priestess seemed like some sort of gray filly. In fact, even today (please see her pedigree photo) her mane and tail looks more like belonging to a gray equine than to any other color. But we all know she is not carrying the gray genotype. Perhaps something similar may be occurring with some of these "seudo-looking" grays cases.

http://www.pedigreequery.com/iroquois+priestess

[accphotography]

My thoughts as well Jorge.

[HeadlessHorseman]

I can't wait to see the pics...

I say he will not stay a chestnut..but I'm no expert...

HH

[angrovestud]

Sabino 1 gene greys out my firend had a chesnut and white and he has a coloured head chesnut, and a splash of chestnut over his rump and a chestnut tail this was when he was a foal, by the time he was two all he had left was a chesnut head and forelock everything else including his tail had gone white.

[RiddleMeThis]

SB1 DOESN'T gray out. Graying and roaning (that SB1 can cause) are completely different things.

If your friends horse was a max white, he most likely ROANED out the rest of the way, NOT gray.

[Truly]

SB1 DOESN'T gray out. Graying and roaning (that SB1 can cause) are completely different things.

If your friends horse was a max white, he most likely ROANED out the rest of the way, NOT gray.

I think Angrove used 'grey out' as a generic term, rather than meaning the horse carried the grey gene.
But I agree you should explain this so others understand

I'd love to understand more on the sabino roaning?..you say it's the SB1 thats causes it...if the TB doesn't carry SB1 why do some max white TB's fade? and is it the same for DW? Thanks

[RiddleMeThis]

I'd love to understand more on the sabino roaning?..you say it's the SB1 thats causes it...if the TB doesn't carry SB1 why do some max white TB's fade? and is it the same for DW? Thanks

SB1 can cause roaning. It doesn't always, but it is one of the features they used to help them identify SB1.

Most of the TBs that we have called Max White really ARENT Max White but are rather DW. Sabinos of any type appear to be able to cause roaning.

DW is kinda hit or miss. Sometimes it will roan it out, and then other times it doesn't. The AA line who is almost assuredly DW appears to roan out less often than the Puchi line does, but it varies,

Hope that helped!

[angrovestud]

Thanks Truly that is what I meant.

[xfactor fan]

Well, if The White Fox is both DW and Grey, half his foals will carry the DW gene, and half his foals will be grey. It should be pretty clear what he's carrying once the number of foals goes up.

Anyone know if there are established interactions between grey and DW?

[ElPrado]

I was under the impression that roan horses did not "roan" out. I've seen roans (other breeds) that never changed color. They were born with dark heads and legs and white scattered through the body base coat and stayed that way. They don't dapple, either. Tbreds don't have the roan gene, except several offspring of Catch A Bird, an Australian Tbred with a mutation.

[accphotography]

Roan horses DON'T roan out. They stay the same. However "sabino" roans can and usually do roan out to some extent.