Olive egger true green project question.

[KAGs waterfowl]

I might be completely wrong, so correct me if I am. I think there might be a way to produce Olive eggers that breed 100% true.

I’m going to assume this brown egg gene is monogenic (one gene determines the trait). Correct me if I’m wrong, but I think it would go like this:

First cross: Pure blue egg layer x Pure brown egg layer = green (olive) egg layer with a white/blue inside shell color.

That F1 Green egg layer (white/blue inside shell) is bred to a Blue egg layer.

The Progeny from that cross would be: 25% green egg with pure blue inside, 25% green egg with white/blue inside, 25% blue and 25% white/blue (pale blue).

Then, you take the green egg, pure blue inside layer hen and rooster and breed them together.

That cross should produce 100% blue inside egg: 50% green egg layer, 25% blue egg layer and 25% brown egg layer.

Now here’s the interesting part: the brown egg layer of the final generation might have a green tint as she has a blue under shell color.

If that can be done, let me know. I’m new to genetics, so please explain to me if that doesn’t work.
Also, when I mentioned the percentage of certain egg colors, I mean the percentage of the layers that lay that color.
Thank you!

 

[JacinLarkwell]

There are more than 1 brown egg genes. Some add speckles, some make them darker, some lighter, but there are a ton of them

 

[KAGs waterfowl]

Ok, but if I used a brown egg layer that had one brown egg gene, would my idea work?

 

[Floof]

Ok, but if I used a brown egg layer that had one brown egg gene, would my idea work?

Since it isn't just one gene, you can't account for it with a simple punnet square. You can selectively breed out the white egg gene but it would take time and selective breeding over multiple chicken generations to achieve.

 

[KAGs waterfowl]

Since it isn't just one gene, you can't account for it with a simple punnet square. You can selectively breed out the white egg gene but it would take time and selective breeding over multiple chicken generations to achieve.

Thanks! Good to know. If I do achieve this goal, would the eggs be brown with a blue inside or will the blue inside show through and make the egg look green?

 

[Floof]

The blue will show through to some degree depending on how dark the brown is. What breed are you planning to use for your brown egg layer?

 

[nicalandia]

I might be completely wrong, so correct me if I am. I think there might be a way to produce Olive eggers that breed 100% true.

There was a similar thread posted a few months ago, and I posted a very lengthy reply, let me find it.


https://www.backyardchickens.com/th...e-breeding-olive-eggers.1493525/post-24913050

 

[KAGs waterfowl]

Floof,
I’m planning on finding a breed that has a simple dominant brown gene, if I can’t find one, I guess there are both dominant and recessive genes on certain brown egg layers, I suppose this would be fine there would be no browns in the back cross to the Blue egg layer, and then if recessive brown pops out from the Green to Green generation, they would still have the blue under shell color.

 

[nicalandia]

Floof,
I’m planning on finding a breed that has a simple dominant brown gene, if I can’t find one, I guess there are both dominant and recessive genes on certain brown egg layers, I suppose this would be fine there would be no browns in the back cross to the Blue egg layer, and then if recessive brown pops out from the Green to Green generation, they would still have the blue under shell color.

I am not sure why finding a breed with a single dominant brown gene is required. All you need is actually a simple dominant mutation like the blue egg shell mutation, breed back to the brown egger and then breed amongst siblings to create a stable line

 

[KAGs waterfowl]

I am not sure why finding a breed with a single dominant brown gene is required. All you need is actually a simple dominant mutation like the blue egg shell mutation, breed back to the brown egger and then breed amongst siblings to create a stable line

Yes, that makes sense now. So, is that correct? The last generation that I posted on the top would throw 25% brown coating with a blue under shell, making the eggs green in appearance?