Coloured experts please.. Just wondering...

Silver Dapple is a gene - so she must be homozygous (two copies) for it. Therefore she will always pass it on to her foals.

However she has grey too and if she has one copy of grey - she has a 50% chance of passing it on. If she has two copies - 100% chance of passing it on.

It doesn't matter how fancy a colour the horse is, if it has grey too, it will grey out.
 
Silver dapple can be masked by gray in so much that this mare could carry both genes and, because gray is a dominant gene the silver would need to be identified by use of DNA testing. Don't know if that would then mean it would be homozygous for silver dapple though.
 
Faracat said:
If she can only have SD foals - then she must be homozygous for it.
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But how can she be homozygous for it, if she has a 50% chance of throwing greys, or atleast foals that will grey out?

Sorry, probably sounding silly - Want to learn more about colours, hence the questions!! :)
 
Right. The base colours are chestnut and black - nothing else.

There are many other genes that alter the base colour.

Silver dapple is one, grey is another.

Genes come in pairs, but grey does not pair with anything other than grey or not-grey (you can have two not-greys). Silver Dapple only pairs with SD or not-SD (again you can have two not-SD's).

A horse can have several modifying genes.

So a horse can have one, or two copies of silver dapple and one or two copes of grey. They could also have one, or two copies of tobiano/cream/roan etc... Or none and just be plain chestnut or black.
 
I would bet that ad is typical Dragon Driving bull****and the horse has no silver dapple genes in it. I'd guess that the owner thinks that silver dapple means dapple grey and the horse is homozygous grey and therefore will always produce grey foals.
 
Gloi said:
I would bet that ad is typical Dragon Driving bull****and the horse has no silver dapple genes in it. I'd guess that the owner thinks that silver dapple means dapple grey and the horse is homozygous grey and therefore will always produce grey foals.
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I think so too, silver dapples that are grey as well will grey out very quickly, they can even be born white. The horse in the OP looks to have a lot of pigment in the coat still.
 
Gloi said:
I would bet that ad is typical Dragon Driving bull****and the horse has no silver dapple genes in it. I'd guess that the owner thinks that silver dapple means dapple grey and the horse is homozygous grey and therefore will always produce grey foals.
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That's a bit of a skeptical leap don't you think. That mare could quite conceivably be a silver dapple that's almost greyed out. The seller states they have a dna test to prove the silver dapple - why on earth would they use the technical term for the gene if what they actually had was a dna test that shows it's homozygous for grey?
 
The mare could be homozygous silver dapple but as she is grey at least half her foals will go grey and if she is chestnut under the grey half her foals wil get the red gene and red horses don't exhibit silver.

I think the ad is misleading and the seller probably is confused about inheritance. The chances of getting a flashy silver dapple foal from that mare, even to a homozygous black stallion, are slim.
 
DabDab said:
That's a bit of a skeptical leap don't you think. That mare could quite conceivably be a silver dapple that's almost greyed out. The seller states they have a dna test to prove the silver dapple - why on earth would they use the technical term for the gene if what they actually had was a dna test that shows it's homozygous for grey?
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Okay
It's Dragon Driving,
The black shown on the horse's legs does not show any sign of being diluted by silver dapple.
Silver dapple isn't that common in gypsy cobs, breeders would normally cash in on that by not crossing with a grey horse and hiding it.
 
The legs of silver dapple horses are frequently incompletely diluted, and as they are not close ups and everything else appears to grey out it is very difficult to say. But putting that aside, the sellers have a piece of paper telling them what the dna test showed, and while they might see the word grey and write an advert saying 'silver dapple' it is just as feasible that they have a piece of paper saying that it is homozygous for silver dapple. Since there is no mention of its specific breeding it could have any number of other breeds in it. And I don't think people advertising on DD are any more likely to get the colour of their horse wrong than those advertising on any other site.
 
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