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Roan link

Hope this is in the correct place. Its my first post so not sure. Can you please explain the roan link to e to me. I understand that it is linked to E or e but don't understand the % when it comes to solids or roan foals? I'm not sure how to explain what I am confused about but will give it a try. OK if the roan is linked to red they should have red roans and black based solids. Black is dominant so if the foal has both a red gene with the linked roan and a black gene will they not both show? Hope that makes sense. :-\\\\

RiddleMeThis Sat, 04/28/2012 - 10:17

[quote=gopher]Hope this is in the correct place. Its my first post so not sure.

Can you please explain the roan link to e to me. I understand that it is linked to E or e but don't understand the % when it comes to solids or roan foals?
I'm not sure how to explain what I am confused about but will give it a try.

OK if the roan is linked to red they should have red roans and black based solids. Black is dominant so if the foal has both a red gene with the linked roan and a black gene will they not both show?
Hope that makes sense. :-\\\\[/quote]

KIT is the gene linked to "E" or "e." So for example we will you to heterozygous black black horses. So two Ee aa horses. One has roan linked to it's "E" the other is solid. When bred together if the horse with roan passes it's "E" it will be roan. If it passes it's "e" the horse will be solid.

If roan was linked to "e" then yes if the roan passed "e" and roan and the non roan passed "E" yes the horse would be blue roan, however, when that blue roan offspring was bred to a chestnut, the only foals that would be roan would be the red roans. They would not have a blue roan. Does that make a bit more sense?

(With a small percentage for cross over.)

gopher Sat, 04/28/2012 - 12:23

In reply to by Daylene Alford

If I understand this correctly a red roan can have blue roans when bred to black, but a blue roan can't have red roans only solid red.

What is the crossover %?

RiddleMeThis Sat, 04/28/2012 - 22:37

In reply to by Daylene Alford

[quote=gopher]If I understand this correctly a red roan can have blue roans when bred to black, but a blue roan can't have red roans only solid red.

What is the crossover %?[/quote]Blue roans can have red roans if they are Ee and the roan is attached to "e". But then they won't have blue roans unless bred to a black.

TheSwingHorse Sun, 04/29/2012 - 12:40

Whoa, this just totally confused the he** out of me. o_o

I'm wondering now about our blue roan. His sire was a buckskin roan. Blue, our stud, is Ee. Seems most of his roan foals (now that I think about it) were chestnut based... So this new filly that I posted the other day is from a grulla (Ee) mare. Is there still a chance the foal is roan or no hope at all? lol

He DOES have one blue roan filly but it was from a brown roan mare... And my hubby just told me about a blue roan colt (I never saw it) that was out of a seal brown mare...

Threnody Sun, 04/29/2012 - 13:33

Your stud's roan is linked to his 'e' allele. Since he is Ee his father, although buckskin roan, was likely Ee with roan linked to his red as well. Unless your stud's dam is chestnut, this is the likely case.

TheSwingHorse Sun, 04/29/2012 - 17:20

Yea, the buckskin roan was for sure Ee because his dam was a palomino roan. Our stud's dam was solid black.

So what does this mean for our stud's foals in hopes of getting roan? I'm totally baffled now... lol

Threnody Sun, 04/29/2012 - 17:48

It just means that the vasy majority of his foals who inherit his red gene will inherit roan. And the vast majority of his foals who inherit his black gene will not.

If only bred to solid chestnut mares he will mostly sire red roans or solid blacks. If bred to solid homozygous black mares you will get 50% blue roan 50% solid black.

What the foal comes out as still also depends on the mares used.

But he will always pass on roan 50% of the time.

Daylene Alford Mon, 04/30/2012 - 08:43

[quote]If only bred to solid chestnut mares he will mostly sire red roans or solid blacks.[/quote]

Unless the mare carries agouti in which case you will get red roans or bays and blacks.

rodeoratdogs Thu, 05/03/2012 - 10:09

So when I do the coat calculator on animal genetics crossing Annie ee/aa (red Dun) with a Ee blue roan like Swinghorses stallion it says I have a 12.5 % chance of getting a blue roan,(just talking base colors here),that's not correct? It would be 7% for a blue roan (probably not going to happen) and %50 chance of a red based roan. That would explain why most blue roan stallions I have seen are Ee, I saw one that was EE Grulla roan.