Are one or both of these two sires homozygous for black? Forgive me if I am misusing the term–I am woefully ignorant of color genetics. TIA!
Well looking at their pedigree http://www.paardenfokken.nl/pedigree.php?horseid=27204 , I would say that they are gg Ee aa.
So aa would be homozygous for uniform distribution of black throughout the coat
but the Ee does leave the chance of producing a chestnut offpspring.
They are both Ee, Espri was chestnut. Avalon Equine (Kathy and Jos) has a gorgeous stallion prospect by Escudo II out of a Mannhattan mare that is homozygous black (EE aa).
I have seen chestnut Escudo I offspring…
We are actually considering using one of the two with a gray mare and were trying to see what the odds are for coming up with a gray versus a black! It appears we must factor in chestnut as well!
This is a great color calculator:
http://www.horsetesting.com/CCalculator1.asp
What color was the mare before she went grey? With one grey parent, you always have a 50% chance of grey (unless she’s homozygous, then it would be 100%).
Nope, both can produce chestnuts…
yup…I bred a dark brown mare to Escudo I…and got a chestnut filly!
(And I’ve seen a Chestnut gelding that was by Escudo II)
If it is the lovely Kaiser mare then since he is a chestnut she is not a homozygous gray…you have 50% chance her foals will not grey. You can determine her base color in a few ways besides sending her in for genetic testing. Her sire is chestnut (ee) he may or may not carry a modifier for black A or a…no way to tell as he has no black to modify. You might be able to find her birth color…before she grayed significantly. Or perhaps you might know her dams birth color. It might not be possible as some foals have significant greying at birth and the greying process usually alters the base color…My chestnut foaled mare is now a black dappled grey with a seeming black mane and tail. You could also look at the birth color of her foals. I have a mare who arrived from Ireland gray but she has had 2 chestnut/gray foals from chestnut stallions. Over time there will be more and more evidence that she might also be base chestnut. PatO
My chestnut mare was just bred to E2 (CHECKED IN FOAL, TODAY–I am GIDDY! :D), and I did the color calculator thing based on his and her parentage: it says I have a 50% chance of getting a chestnut, 25% chance of getting a black, 25% chance of getting a bay.
So of course it will be a chestnut filly, LOL (but really, I am over the moon thrilled to get a big black dot, so I don’t care ;))
No, the Es are not homozygous for black points (I don’t think it’s possible to be homozygous for black.)
Both my redheads bred to E2 had dark chocolate fillies
[QUOTE=Sakura Hill Farm;5801805]
We are actually considering using one of the two with a gray mare and were trying to see what the odds are for coming up with a gray versus a black! It appears we must factor in chestnut as well![/QUOTE]
It will always be 50%/50%, unless your mare is GG, in which case it will be 100% gray, every foal, every time.
It doesn’t matter what you breed her to… if she passes on a G gene, it will mask whatever color is underneath. No way to avoid it. You can have an EE G/g horse. (Or EE GG as it were)
Thanks, All!
We shall see…!
I had a red Escudo 1 mare
Thanxs for the coat color calculator it was fun to use.
