Sex- linked Information

[Kev]

No as neither type of white is sex linked . I think for feather sexing to be accurate you must breed 2 separate lines and cross them . Interested in how accurate this is .

Yes this is accurate- if a hatchery uses this method, they use hens with a specific slow feathering gene that is sex linked bred with fast feathering male line. Same idea with barring and silver.

Same with barring and silver, it will not work if a slow feathering rooster is bred with fast feathering hens.

 

[lazy gardener]

Thanks, all for the comments regarding the random white feathers that show up.

 

[TheChickenQueen]

I have a question for those that can answer.

For a red sex-link would a Jubilee Orpington work for red, and Silver-Laced Wyandotte for silver?

Also I have splash orpington roo who is a forth buff orpington, could he work even though he just has some red(not buff) leakage starting to come in?


And what all can the color blue be used for in a sex-link?

Also I have some EEs that are coming in barred, one is white with black barring, two have red under and black barring. Can they work for Black Sex-links?


I really think Sex-links are cool...

 

[englishcockers]

Quote:

 

[TheChickenQueen]

Yes! Thank you!
I have a silver-laced who her coloring was messed up, and I think my jubilee might be a roo. They would have some very cute chicks with colors that are all over the place.


I have 2 splash orps who are both roos, 2 blue orps that I'm not sure about, and 2 black orp pullets, then I have a little blue Phoenix/OE, and blue andalusian pullet. So I was curious.

 

[Brada Puhi]

Aloha kākou,

This is a very interesting thread. Mahalo to all of you contributors. I have a couple of questions, please.

My friend has Delawares and Black Jersey Giants. His black rooster died so he threw in a BJG hen with the Delaware rooster. We only got males that were barred like a barred rock.

1) Is that barring? Or cuckoo? Or just plain ole co-dominance?

2) Would the female offspring have been white?

I assume the sons would be S/Bl because they inherit the S (silver) from the mom and Bl from dad,

The daughters would only get S from the Delaware father, so would be white. No?


Mating a BJG rooster to a Delaware hen would make sons with S and Bl, and daughters with Bl.

Does the roosterʻs color need to be a recessive color like gold?

Thanks for any replies.



Aloha, Puhi

 

[Ridgerunner]

It’s the same sex linked barred gene that’s used to make Barred like Barred Rock or Cuckoo like a Cuckoo Marans. From a black sex link viewpoint it’s the same gene. What makes the major difference between cuckoo and barred is the slow or fast feathering gene. There are always other factors but simplistically put, if a barred chicken has the fast feathering gene the barring comes out with that scattered cuckoo look. If a barred chicken has the slow feathering gene the feather grows slower and comes out sharply barred. It’s the rate of growth of the feathers that determines if the look is cuckoo or barred, not the barring gene itself.

The Jersey Giant has Extended Black and may have either gold or silver. The Delaware will have silver and is probably Wheaten. Extended Black will dominate Wheaten so the chicks will be black. Silver or gold is irrelevant. So all the chicks will be black. Whether they are solid black or barred depends on the barred gene.

The Delaware has barring and the Jersey Giant does not. It’s important which is the mother and which is the father. The rooster has two genes at the barring gene pair and the hen only has one. The rooster will give a copy to all his offspring but a hen only gives that gene to her sons. The daughters only get what the father has. That’s what makes a sex link work. If the hen has the dominant gene, in this case barred, and the father is pure for the non-dominant gene, in this case not-barred, the chicks will be sex linked. Pure means that both of those genes are the same, where split means that he has one gene of both barred and non-barred in that gene pair.

The other part of this is that the result has to be seen in the down. There are some gene combinations where the sex linked part is right but you cannot see it in the down.

So if you put a Black Jersey Giant rooster over a Delaware hen you get black sex links. If you put a Delaware rooster over a Black Jersey Giant hen all the offspring will be barred, male or female. They all got a barred gene from their father. Just because all those chicks are barred does not mean they are all male. You have to determine that by some other means.

You cannot make a solid white chicken with just Silver. If the other genes allow it to express itself the silver gene will give a version of the Columbia pattern like the Delaware where the body is white but the tail, neck, and maybe some other feathers will be black. To get solid white you need either Recessive White or Dominant White. Even with Dominant White you need certain other genes present to get a solid white chicken. There are so many interactions between the color and pattern genes, various dominance and recessive or partial dominance, and so many potential modifiers it’s hard to say much of anything where there are not exceptions. The appearance of the chicken depends on a lot of different genes and how they interact.

 

[Brada Puhi]

Aloha,

Mahalo for sharing your knowledge. Very interesting.

So the Delawares have dominant Silver(S) color one one chromosome and a barring gene(B) on another part of the Z chromosome?

And Black Jersey Giants have dominant Extended black(E) and do not carry the barring gene(b+)?

Mahalo, Puhi

 

[Brada Puhi]

One more:

If the Delaware roo over the BJG hen makes all barred offspring, where does the white color come from in the female offspring? Or is the white color of barring part of what barring is?

Also, What happens to the Silver in the male offspring? I thought it was part of the barring since it is dominant. Or at least co-dominant?

Mahalo nui, Puhi

 

[jerryse]

One more:

If the Delaware roo over the BJG hen makes all barred offspring, where does the white color come from in the female offspring? Or is the white color of barring part of what barring is?

Also, What happens to the Silver in the male offspring? I thought it was part of the barring since it is dominant. Or at least co-dominant?

Mahalo nui, Puhi

The white is silver not really white . Silver is sex linked . So all female offspring are hemizygous for silver and barring . The male offspring have one copy of silver and barring . Silver and barring are separate genes . Barring interrupts black as the feather grows leaving no pigment . This is the white bars . You can have silver and barring in the same bird . Maybe someone else will give this a try .