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Homozygous and pattern question?

Equine-Reproduction.com Bulletin Board » Equine Genetics » Homozygous and pattern question? « Previous Next »


Author Message
 

Joyce
Weanling
Username: Luv2ridesaddleseat

Post Number: 49
Registered: 12-2006
Posted on Tuesday, August 07, 2007 - 05:54 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Ok, my mare is a black and white tobiano, homozygous for tobiano but not for black. I may breed her this spring to a Sorrel/Overo stallion. When I put this information into the "color calculator", it came out that the foal could come out being a "tovero"? Is this true" What exactly IS a Tovero? Is there always alot of white on them?

Thanks!
 

Emily West
Breeding Stock
Username: Paintlover

Post Number: 277
Registered: 06-2006
Posted on Tuesday, August 07, 2007 - 06:29 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

No, there is not always a lot of white on them. A tovero would be a horse that carries one tobiano gene and one overo gene. The overo gene can be sabino, splash, or frame. Usually you can tell because they will exhibit charactor traits from both genes. Like a white face on a horse that looks to be tobiano or jagged edges.

Here is APHA's definition of tovero.
http://www.apha.com/breed/tovero.html

I came across this horse the other day and here is an example of what I think is a really nice looking tovero. I believe he has the splash gene but could be wrong.
http://evenhavenhorses.com/even_havens_dr_zeuss.htm

Hope that helps!!
 

Joyce
Weanling
Username: Luv2ridesaddleseat

Post Number: 50
Registered: 12-2006
Posted on Tuesday, August 07, 2007 - 06:48 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank you Emily! And yes, that stallion is nice! Now I have another question for you. My mare is black and white tobiano and the stallion is a sorrel/overo. Do you know what the color possibilities are? I beleive their is a chance I could get a Bay tobiano?

Thanks for your help!

Joyce
 

Emily West
Breeding Stock
Username: Paintlover

Post Number: 278
Registered: 06-2006
Posted on Tuesday, August 07, 2007 - 08:00 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

If the stallion carries an agouti gene,( the gene that restricts black to the points of the body), then yes there is a chance. Otherwise you will get black or sorrel.
 

Joyce
Yearling
Username: Luv2ridesaddleseat

Post Number: 51
Registered: 12-2006
Posted on Tuesday, August 07, 2007 - 08:47 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Interesting... I'll have to find out if he carries the agouti gene.

Thank you Emily!



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