Does anyone know the genetic makeup of Isbar eggs? I mean, obviously they are green. But would a breeding with a Marans guarantee an Olive Egger? While waiting for my Isbar boy, I put my little Isbar lady in with El Jefe (Blue Copper Marans). Three weeks later, I'm setting her eggs. Just curious what she'll throw as an egg gene. I set a few of hers while she was in general pop...actually think my very young cochin mated with her...lighter green eggs?
My Orpingtons and Barnevelders need to pick up on their laying. I'm clearly resorting to setting whatever I have "just to see."
Isbars carry double blue OO and some combination of brown to get to green. There is only one gene for blue, but at least 15 different brown egg genes. There are a few very dark ones that can only be inherited one or the other, and several modifier browns that can "stack up" to make the very dark Marans eggs. When you cross an Isbar to a Marans you should get a very nice deep olive egger. Crossed with the cochin yes you should get a green very similar but possibly lighter than her mother. Depends on which brown egg genes she inherits.