genetic testing questions.. again, sorry

[RobinRTrueJoy]

I am sending in hair on my new stallion. I already know for sure that he is homozygous for tobiano, but I want to check to see if he is homozygous for black also.

Which do I check off? Red factor? Agouti? I am so bad at this. Thanks for your help.

Robin

ps. There is no check off for sabino.... I thought there was a test for it ?

 

[Becky]

Hi Robin, yes to test for black, you test for red factor. No need to test for agouti if you are positive he's black. A black horse carrying agouti will be bay barring any other dilute genes. There is a test for the Sb1 sabino gene available. Depending on the lab you are using, they should be able to test for that too.

 

[RobinRTrueJoy]

Thanks Becky!

Now, if he is homozygous for black, how will the red factor read?

Robin

 

[Meavey]

Chestnut is ee

Black is Ee of EE and then EE is homozygous black.