Creating "True-Breeding" (Homozygous For Blue Shell Base) Olive Eggers

IoneDexamene

In the Brooder
Jul 20, 2017
3
4
34
The only chicken that breeds true for a remotely dark green egg is the Swedish Isbar, an expensive and hard-to-find variety which often lays disappointingly pale eggs. To remedy this, I've come up with a strategy to quickly create olive eggers that are homozygous for the blue shell base gene, but without the huge quantities of test crosses usually suggested for this sort of breeding program. I'll give the TL;DR here first, but I can give more information on how and why this cross works if anyone is interested.

In short: take the darkest-laying pea-combed olive egger hen you can find (must lay a green egg, not brown!) and cross her to a cream legbar rooster. The vast majority (around 94%) of the offspring with pea combs will be homozygous-for-blue-shell-base olive eggers, and their eggs will be about half as dark as their mother's. You can use these birds to start a flock of relatively true-breeding olive layers. The recessive white shell base will still be lurking in your flock, to some extent, but not in any great quantity; as long as you remove the rare brown layers that pop up from your breeding program, the trait will continue to fade from your population. At this point, you can also start selecting for darker eggs if you want, the same way you might with a marans flock.

If anyone has any questions about this, wants/plans to do this cross, or has ever done (or even heard of!) projects similar to this one, please let me know! If there's interest, I may also have hatching eggs available in the future.
 
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MysteryChicken

Unique minded, open minded Chicken Lover
Premium Feather Member
May 31, 2018
28,430
57,121
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East, Tawas Michigan
I'll be making a new breed called The Emerald Dragon. It's gonna be a Giant, Meaty, Showy, Great producer of green eggs. It's gonna have a Gamefowl body build, black shiny, long flowy feathers, black skin, & walnut comb.

Trying to figure which one of my EE/Brahma crosses is laying these.
20201104_222618.jpg
 

IoneDexamene

In the Brooder
Jul 20, 2017
3
4
34
Wow, what a beautiful shade of olive! That's a great amount of brown pigment/blotch for an EE/brahma cross! I haven't heard any other reports like this, but anecdotally, I once had a case where an easter egger who was just starting to lay laid a blue egg, then a white egg, then blue for the rest of her life. I speculated that the biological mechanism that makes the eggshell blue wasn't fully "in gear" yet at first. Looking at your thread, it seems possible that your case is like this, but that's just a guess. Either way, best of luck identifying who's laying olive, and congratulations on your pretty eggs!

Your breeding project sounds amazing! Fibro olive eggers sound pretty much like my idea of a perfect chicken, haha. I'm off to subscribe to your thread! :)
 

MysteryChicken

Unique minded, open minded Chicken Lover
Premium Feather Member
May 31, 2018
28,430
57,121
1,141
East, Tawas Michigan
Wow, what a beautiful shade of olive! That's a great amount of brown pigment/blotch for an EE/brahma cross! I haven't heard any other reports like this, but anecdotally, I once had a case where an easter egger who was just starting to lay laid a blue egg, then a white egg, then blue for the rest of her life. I speculated that the biological mechanism that makes the eggshell blue wasn't fully "in gear" yet at first. Looking at your thread, it seems possible that your case is like this, but that's just a guess. Either way, best of luck identifying who's laying olive, and congratulations on your pretty eggs!

Your breeding project sounds amazing! Fibro olive eggers sound pretty much like my idea of a perfect chicken, haha. I'm off to subscribe to your thread! :)
It could be possible my girl is having a pigmentation issue.

Thanks, I love the color she produces. I hope it's 100% the lady I leg banded.

I hope you like my thread.
 

Jennamomof4

In the Brooder
May 24, 2021
3
31
39
The only chicken that breeds true for a remotely dark green egg is the Swedish Isbar, an expensive and hard-to-find variety which often lays disappointingly pale eggs. To remedy this, I've come up with a strategy to quickly create olive eggers that are homozygous for the blue shell base gene, but without the huge quantities of test crosses usually suggested for this sort of breeding program. I'll give the TL;DR here first, but I can give more information on how and why this cross works if anyone is interested.

In short: take the darkest-laying pea-combed olive egger hen you can find (must lay a green egg, not brown!) and cross her to a cream legbar rooster. The vast majority (around 94%) of the offspring with pea combs will be homozygous-for-blue-shell-base olive eggers, and their eggs will be about half as dark as their mother's. You can use these birds to start a flock of relatively true-breeding olive layers. The recessive white shell base will still be lurking in your flock, to some extent, but not in any great quantity; as long as you remove the rare brown layers that pop up from your breeding program, the trait will continue to fade from your population. At this point, you can also start selecting for darker eggs if you want, the same way you might with a marans flock.

If anyone has any questions about this, wants/plans to do this cross, or has ever done (or even heard of!) projects similar to this one, please let me know! If there's interest, I may also have hatching eggs available in the future.
Do you have any hatching eggs now or olive egger for sale and where are you located?
 

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