Bobtail genetics

[Justso]

Has anyone worked out the genetics of a bobtail Cochin?

 

[Amer]

I believe it’s basically recessive, but I don’t know what locus it belongs to.
It’s strange because it looks like it belongs on the recessive white locus, but I really don’t know. @nicalandia can you tell us more?

 

[Nemmi123]

Its Double laced lavender birchen! The double lacing on the neck feathers has completely got rid of what would have been a lavender center to each feather.

Here's a photo of blue birchens. Obvious similarity, only we all know the blue version wouldn't breed true like lavender would .

 

[Amer]

Its Double laced lavender birchen! The double lacing on the neck feathers has completely got rid of what would have been a lavender center to each feather.

Here's a photo of blue birchens. Obvious similarity, only we all know the blue version wouldn't breed true like lavender would .
View attachment 2751692

Wait, how does it effect the male coloring? That’s an interesting theory.

 

[Nemmi123]

Wait, how does it effect the male coloring? That’s an interesting theory.

That's the sl, recessive white gene in double does. Females only got one copy . So I trying to get the colour in another breed. Its the sl gene that will be harder to bring accross...

 

[Amer]

That's the sl, recessive white gene in double does. Females only got one copy . So I trying to get the colour in another breed. Its the sl gene that will be harder to bring accross...

Thank you! This really helps! What breeds do you raise?

 

[MysteryChicken]

Bobtail is Sex-linked Albinism, it's located on the Silver Gene.

Males can be: Split, S^al/s^al

Gold, Split, s+/S^al

Sex-linked Albinism: S^al/S^al



Females: S^al/-

 

[MysteryChicken]

I believe with the Cochins coloration is on a Birchen base if I remember correctly.

 

[Nemmi123]

Brahmas of most coloures,

That's the sl, recessive white gene in double does. Females only got one copy . So I trying to get the colour in another breed. Its the sl gene that will be harder to bring accross...

Thank you! This really helps! What breeds do you raise?

Brahmas of most coloures (I created white partridge in them. Using dominant white birds over exhibition penciled gold partridge). I plan on using several bobtail males (because the can pass on the sl gene to all offspring regardless of sex) to create the colour in brahmas. And I know I will succeed . I love a good project!

Also I have;
Black Jersey giants
Red shouldered yokohamas
Malay shamos
Pekins (bantam cochins if your in the US)
Polish crested
Seramas
And I've recently sourced some Dong Tao eggs

So that's the world's, biggest, tallest, heaviest, smallest, long tailed and soon to be the world's rarest chicken breeds all covered

 

[Jonnyhcochinsnfowl]

Bobtail is a form of recessive white, based on brown.