Looking for Gene info for the Alula / Bastard Wing / Carpal Spur.

TokoBird

Chirping
Feb 12, 2025
23
89
79
Texas - South of Dallas
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I’d like to start a breeding project that focuses on making a strain of chickens with large Alulas - the “thumb” of the wing. (Also called a ‘bastard wing’ on some species, when feathered well)

My focus would be on making the whole structure (bones, musculature, and spur) bigger and well-articulated, while otherwise maintaining general health and fertility.

I’d pay no attention to coloration, crest, or carriage, beyond markers that show good health and hardiness (avoiding mutations proven to negatively impact the breed)

The “success” criteria would be EITHER a naked Alula “thumb” which was visible and articulated ( movable and not hanging limp) OR a large and well-feathered Alula that resembles a small “second wing,” as seen on raptors and gulls, which likewise was well-controlled by the bird.
In both cases, the primary focus would be the musculature, joint, and size of the underlying digit. Feathering isnt a concern of mine.

-

Now, I’m happy to just START, as I’ve done some fish breeding in the past, was raised around horse breeding, and am generally well-educated on genes, epigenetics, and and patterns inheritance. I’ve been wanting to do this before I even had a yard to keep chickens in. I know this is a big-ass project, since it involves changing whole digit, rather than just color expression, and have buttloads of plans for tracking generations to ensure good diversity and multi-flock pushing toward the goal, for down-line interbreeding. I’ve got all that covered.



I was hoping that someone else had some existing knowledge about the Alula’s inheritance patterns they could share, or knows of any studies on the matter.

I’ve found a lot on rooster heel spurs, but the wing spurs appear to be greatly overlooked in what literature I could find.

Chicken feather and skin colors have been well-documented. I’m hoping other chicken genes have been as well.
 
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I’d like to start a breeding project that focuses on making a strain of chickens with large Alulas - the “thumb” of the wing. (Also called a ‘bastard wing’ on some species, when feathered well)

My focus would be on making the whole structure (bones, musculature, and spur) bigger and well-articulated, while otherwise maintaining general health and fertility.

I’d pay no attention to coloration, crest, or carriage, beyond markers that show good health and hardiness (avoiding mutations proven to negatively impact the breed)

The “success” criteria would be EITHER a naked Alula “thumb” which was visible and articulated ( movable and not hanging limp) OR a large and well-feathered Alula that resembles a small “second wing,” as seen on raptors and gulls, which likewise was well-controlled by the bird.
In both cases, the primary focus would be the musculature, joint, and size of the underlying digit. Feathering isnt a concern of mine.

-

Now, I’m happy to just START, as I’ve done some fish breeding in the past, was raised around horse breeding, and am generally well-educated on genes, epigenetics, and and patterns inheritance. I’ve been wanting to do this before I even had a yard to keep chickens in. I know this is a big-ass project, since it involves changing whole digit, rather than just color expression, and have buttloads of plans for tracking generations to ensure good diversity and multi-flock pushing toward the goal, for down-line interbreeding. I’ve got all that covered.



I was hoping that someone else had some existing knowledge about the Alula’s inheritance patterns they could share, or knows of any studies on the matter.

I’ve found a lot on rooster heel spurs, but the wing spurs appear to be greatly overlooked in what literature I could find.

Chicken feather and skin colors have been well-documented. I’m hoping other chicken genes have been as well.
Would be an interesting project to attempt.
 
A pointer: You wanna select birds with larger wing claws, & breed only from them, & breed from those who are produced with even larger wing claws. Just keep breeding up the size.

I'm currently working on recreating the PBA which requires selectively breeding down the beak of an Asil/Aseel breed chicken.
 
A pointer: You wanna select birds with larger wing claws, & breed only from them, & breed from those who are produced with even larger wing claws. Just keep breeding up the size.

I'm currently working on recreating the PBA which requires selectively breeding down the beak of an Asil/Aseel breed chicken.
parrot beak aseel is one of the breeds that got me on this quest! They reminded me so much of an Oviraptor, I want to do this longfinger project in the eventual far-future hopes to cross breed them all and make a parrot-beaked, long-legged, long-fingered, chicken that would look even MORE like a mini Oviraptor ahaha~
It’s a bit of a pipe dream, and I’m sticking with the longfinger focus for realism.

If you do manage to recreate (or approximate) the PBA, I’d love to see your chickens!
 
parrot beak aseel is one of the breeds that got me on this quest! They reminded me so much of an Oviraptor, I want to do this longfinger project in the eventual far-future hopes to cross breed them all and make a parrot-beaked, long-legged, long-fingered, chicken that would look even MORE like a mini Oviraptor ahaha~
It’s a bit of a pipe dream, and I’m sticking with the longfinger focus for realism.

If you do manage to recreate (or approximate) the PBA, I’d love to see your chickens!
Nice.
That'll be an interesting looking bird.

I'm getting there. These are the best faced ones from my second batch last year.
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I had wing claws pop up on some of my mutts. Oegb/serama X silkie. I’m going to assume they came from my hatchery quality silkies. I sold off those silkies before making this discovery. Would this be a sought after trait for fellow chicken enthusiasts? I honestly thought the wing claw was a broken feather at first, nope, just an oddly placed toenail.
 
I had wing claws pop up on some of my mutts. Oegb/serama X silkie. I’m going to assume they came from my hatchery quality silkies. I sold off those silkies before making this discovery. Would this be a sought after trait for fellow chicken enthusiasts? I honestly thought the wing claw was a broken feather at first, nope, just an oddly placed toenail.
All chickens have wing claws. Some are less prominent then others. It doesn't effect quality.
 

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