Colour genetics- for buckskin and white

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Shakira38

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Hi,

I got my results back today from Animal Genetics UK. So my mare who is a buckskin tobiano is AA (homozygous agouti) and is Ee (carries the red gene). She is also Heterozygous for tobiano gene.

She is to go in foal next year and I would love to ''try'' and re produce her colour. What would be the best colour of a tobiano stallion to do this with.

I want to breed a QUALITY foal not just on colour so if for instance one stallion gave me a 80% chance of buckskin tobiano and another gave me 50% chance however the 50% stallion would in theory be better suited to my mare I would obviously go for that option (if you get what I mean?)

Also, I don't have any idea of her breeding what so ever. Is there any way the colour genetic information I have would tell what colour her sire and dam were likely to be?

Thanks
 
I'm not nearly as good at this as others on the forum, but I think the problem you will have replicating her colour will be the cream gene. To get a buckskin tobiano you will obviously need a black base with an agouti gene, a tobiano gene and a cream gene. Your mare is homozygous for agouti, so that bits easy. She carries a red gene so you would need to find a stallion who doesn't, to guarantee the black base. He would also have to be homozygous tobiano in case your mare didn't pass that gene on. The problem is, she may or may not pass the cream gene on so you have three options there:

1-Choose a cremello or perlino stallion which will guarantee a cream gene, but if she passes on hers, you will get a cremello or perlino foal.

2-Choose a stallion with one cream gene. Then you have a reduced chance of a cremello/perlino, but may also end up with a foal with no cream gene.

3-Choose a stallion with no cream gene and hope your mare passes on hers.

It would seem that this is not an easy colour to replicate!

Hope this makes some sense, I'm sure someone will be along to put it much more succinctly!
 
Lindsay seems to have covered it well.

Mare is Ee AA Crcr Toto

As long as Stallion is EE then the result will be Bay based, a ToTo stallion will give 100% tobiano foal (but espression level varies so cant garuntee whether you end up with socks or all white) a Toto will give 75% chance tobiano, 25% non-tobiano.

Cream is the awkward one as Linsay said, you want Crcr, the only sure way would be to breed a Bay to a Perlino (cr cr + CrCr = Crcr) but with the mare being Crcr you can go for CrCr with 50% perlino 50% Buckskin result, Crcr with 25% perlino, 50% buckskin 25% bay or crcr with 50% buckskin, 50% bay.

All in all you can't really get the odds better than 50% for a buckskin but would you rather have a bay or a perlino if you don't get what you wanted?

You may find it best to go for a bay tobiano stallion as I am sure you will have far more choice on the temperement and conformation side than a buckskin tobiano as there are likely a lot more Bays out there.
 
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If you go on this site, you can make the calculations and see what combination of colour genetics would give you the best percentage of getting what you want.

That is the easy part!!!!

Then you have to find a stallion with those genetics who is worth breeding with!!!!!!!!!!!!!!!!!!!!!

http://www.animalgenetics.us/CCalculator1.asp

It looks like you need to find a buckskin homozygous tobiano, who is not a red carrier to give you the best percentage which would be


50.00% -Buckskin Tobiano
25.00% -Perlino Tobiano
25.00% -Bay Tobiano
 
My thoughts on the percentage calculations are that it'd false hope tbh.......you either get that gene or you don't. It's only a guarantee if it's 100% .
So my thoughts are unless you can find a homozygous tobiano...which will guarantee a tobiano foal, then go for a solid colour stallion as the foal will either be tobiano or it won't, because your mare carries one tobiano gene anyway.
Your mare is homozygous for agouti so it's impossible for her to have a black foal whether or not she is put to a black, bay or chesnut stallion.
She has one cream gene so it will either be passed to the foal or not. If you use a stallion with one or two cream genes you may end up with a perlino or cremello, so lessening your chances of getting buckskin.
I personally think try and find a solid black or bay stallion that is EE not Ee and hope your mare passes her cream gene and her tobiano gene.
I just think it narrows down the colours you are likely to get and also gives you wider choice of quality stallion to use.
 
My blue and white mare has just had a buckskin and white colt this morning, his sire is a perlino stallion
IMG_2777.jpg

IMG_2743.jpg
 
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