Without going into a huge genetics explanation, I'll give you my probability. You only need one blue gene to get a blue egg. (no blue genes = white egg). If you add brown coating you either get brown or green.
White shell + brown coating = brown
Blue shell + brown coating = green
I have Turken hens laying green eggs. I know they got the blue egg gene from their moms since the moms are Ameraucanas and Legbars, both of which are supposed to have two blue eggs genes. They will pass the blue egg gene on to half of their chicks, so 50% of their chicks will lay blue/green eggs if the dad does not have blue genes.
The rooster I have is an Easter Egger and has at least one blue egg gene. If he has one blue gene half of his offspring will produce blue/green eggs. If he has two blue genes 100% of his off spring will lay blue/green eggs.
Combine the rooster with the turken hens and you are guaranteed at least 75% of the chicks having blue egg genes.
In addition, the dad to the turken hens was also an Olive egger that had one blue egg gene. If he passed that on to the hens they will produce 100% green egg layers.
In conclusion, you have 75 - 87.5% probability of each chick having blue egg genetics. They also have Marans in them, so the eggs will probably be darker green or olive. I don't keep any hens around here for breeding that aren't blue eggers or dark brown layers. The "regular" colored eggs get sold for eating.
I will post pics of the chicks as soon as they hatch. The color of their eggs will be determined in about 6 months. I'm pretty sure they will be green.
My turken eggs from this weekend.
I am going to breed green and dark eggers as well. I have a rumpless araucana and BCM cockerels. my NN pullets are really big. will my araucana be able to mate with them (almost double size)?