Genetic experts - blue eyes

[Guestless]

I'm a bit of an amateur when it comes to working out all these genes. Can anyone advise if it's possible for 2 heterozygous coloureds with brown eyes to produce a foal with a blue/wall eye? Friend is hoping to breed this year and wondered what the chances were (she doesn't like wall eyes).

Thanks.

[sarahp]

I assume you mean tobianos when you say coloureds? In which case yes, but no idea what the chances are, sorry.

[Guestless]

Yes tobianos or piebalds in old money

[sarahp]

Ah but to be boring and scientific not all piebalds are tobianos! The latter is a genetic term for a specific pattern, whereas piebald just means black and white patches, which may have various different genetic causes. I breed Welsh where one needs to know as the WPCS is funny about white markings, I do apologise for being pedantic and boring!

[Guestless]

It's fine, I know we are supposed to think about tobiano and overo nowadays but I still tend to think of them as American terms rather than UK ones...I do usually use the term tobiano though.

[eclipse]

eye colour is controlled by two genes (incomplete dominance i think, cant remember) so is next to impossible to predict.

[ffynnoncadno]

I love the blue eyes and I have a skewbald with two blues,and I bred her to my D stallion and the foal was a blagdon splash with two blues(I was chuffed to bits) but her foals so far have all been brown eyes and another foal my skewbald had was with my arab stallion and that had one blue eye
that's the thing with breeding,you just don't know what's going to come out Hopefully a healthy foal

[sarahp]

Ther are three basic causes of blue eyes - double dilutes always have pink skin and blue eyes, big white markings which include the eye will cause the enclosed eye to be blue, and the others, found in with dark skin surrounding them, which are usually connected to particular colours, often the white markings genes including tobiano, splashed white and sabino. The D stallion may well have been sabino ffynnoncadno, blagdons are genetically sabino.

[ffynnoncadno]

Thanks Sarahp now I'm totally confused

[thecremellosociety]

blue eyes can also come from lack of pigmentation caused by a white marking touching the eye

[sarahp]

That's what I meant in my second reason above!

Sorry ffynnoncadno to confuse you, only trying to help.

[brt]

Mar 1, 2010 18:04:26 GMT Guestless said:

It's fine, I know we are supposed to think about tobiano and overo nowadays use the

Piebalds and Skewbalds to me, and always will be lol!!
(i'm too old to change now)