Will I get colour??

[solitaire sr]

Hi, I'm looking to maybe put our blue and white pba mare in foal either next year or the year after..

I have something in mind which has frozen semen available,, I was just wondering what the chances are of a coloured foal??

The pony is bay tobiano and has produced coloured to other coloured mares..

I'm not the best on colour genetics etc, so any advice would be greatly appreciated..

Thanks in advance

[lucynlizzysmum]

I think it would need to be homozygous to guarantee colour - if you got to www.makgene.com it has quite a good explanation

[maddiesmum]

If either your mare or the stallion, or both are Homozygous for Tobiano then you are guaranteed a coloured foal.

If neither are and they are both Heterozygous, then you have 75% chance of colour and 25% chance of solid.

Google foal colour calculator if you want to have a play with what colour coloured you could get! Lol

[solitaire sr]

Thanks for your replies xx

[sarahp]

By colour I assume you mean with white patches? First, your blue and white mare is grey with white patches so she will grey out like any other as time goes on, and may pass on a grey gene to her foals; if she has two copies of the grey gene all her foals will inherit one. Do you know what colour her parents were?

If the stallion is bay tobiano he will have at least one copy of the tobiano gene (same applies to your mare), if he has two then all his offspring will be tobiano but in this case he will normally be advertised as homozygous for tobiano. Again, looking at his parents' colours will help - if only one is tobiano he can't be homozygous.

Looking at the mating - if either parent is homozygous for tobiano then all foals will be coloured. If both are heterozugous, ie have one copy, then 25% will be solid and 75% will be coloured, with one third of those being homozygous.

[solitaire sr]

Wow thanks sarahp...

My mares dam was grey pba and her sire a bay and white sports pony (painted percy)...

I'm unsure if the sire I'm looking to use is homozygous but will check...

Yes our blue and white is 7 and going very light quick..

Xxx

[solitaire sr]

And yes with white patches xx

[solitaire sr]

The pony I'm looking to use, his sire was bay Nd white and dam chestnut and white xx

[leevale]

Without any more info, you have at least a 75% chance of patches with a heterozygous stallion as your mare is definitely heterozygous, but if the stallion is homozygous, this rises to 100%.
You also have a 50% chance of the foal being grey (either with or without white patches), as the mare is heterozygous for grey, and the stallion has no grey gene.
Good luck


Try this colour calculator www.animalgenetics.us/Equine/CCalculator1.asp

This will give you every possible combination, and the chances of each. You need to know the mares birth colour.

[sarahp]

So your mare carries one copy of grey and one of tobiano then, she couldn't have two of either, so 50% of her foals would be grey, and 50% coloured - those are separate, not one or the other. All four different combinations are possible.

The stallion could possibly be homozygous if he'd inherited a tobiano gene from both parents, obviously they both had at least one but as we don't know for certain he could be heterozygous. You could always ask the owners if he has been DNA tested, that would tell them if he's homozygous or heterozygous.

[solitaire sr]

Hi.. found out he is heterozygous?... xxx

[leevale]

Definitely 75% chance of a coloured foal with your heterozygous mare then.

[solitaire sr]

Thanks LeeVale and everyone else taking the time to reply xxx

[blossybloss]

you have 50% chance of colour(patches) and 50% chance that foal will go grey