Sex- linked Information

[Ridgerunner]

Looks like Catdaddyfro was closer than me.

Barring is a sex linked gene. That means the male offspring gets a copy from each of his parents but the female offspring gets a copy from her daddy only.

With a BA rooster and a Delaware hen, the female offspring wil get a b from their daddy and nothing from mommy. so the pullet will be b-. The males will be Bb. The Delaware hen contributes a B to her sons. A BA rooster contributes a b to each of his offspring.

When you cross the b- pullet with a Barred Rock roooster, which is BB, their sons will be Bb, split for barring. Their daughters will be B-.

So to set barring in all of them, you'd need to cross those B- daughters with the BB Barred Rock rooster. All offspring of theirs will be pure for barring.

An alternative and a bit harder but still very possible, you could cross the Bb males from the Barred Rock rooster over those b- pullets with their B- sisters. Half your pullets will be barred but half won't be. Half the cockerels will be BB and half will be Bb. You should be able to tell the difference because the BB males will be lighter in color than the Bb boys once they feather in.

I read this a couple of times so I think I got it right. That last paragraph can be a bit confusing.

 

[Noncentzter]

I understand, thank you!

 

[Arielle]

NOncentzter --I'm only one generation ahead of you.

I"ve put all my black barred hens with my 2 AMericauna roosters. THe girls are a hodge podge, getting the barring from black sexlink fathers, and mother could be anything else I have. THe Am roosters are a blue and a black split for silver and lavender. THe first generation should be black sexlinks. And produce a green- lt olive egg.

THink I got it right!!


I'm still thinking about putting a red rooster on the silver laced wyandottes. THe lacing is soooo pretty.

I have two girls which are red laced and are very pretty-- just not sure how I got them. A mystery that causes me to speculate, a lot, as they are very attractive.

 

[chicken pickin]

If I crossed a BCM roo to Barred Rock Hens will that produce sex link chicks?

 

[Arielle]

yes

 

[tadkerson]

I appreciate your response Tim. I've wondered about that.
Do you have a list of which genes can cause problems with seeing the spot, or is that list so big or so dependent on what else is there that such a list is impractical?

In order to show the spot the area must be dark enough to differentiate the spot from the surrounding color. Any brown to black color will work. I have seen the spot on BBR down, blue down and black down. Wheaten down will not work-too light in color. Many gene combinations will work- just has to be some what darker than the spot.

Tim

 

[nicalandia]

In order to show the spot the area must be dark enough to differentiate the spot from the surrounding color. Any brown to black color will work. I have seen the spot on BBR down, blue down and black down. Wheaten down will not work-too light in color. Many gene combinations will work- just has to be some what darker than the spot.

Tim

True, silver wheaten and dominant white based on extended black should be the most dificult chick down to sex using sex linked barring..

 

[GhostRider65]

Well my crosses this year were interesting a Del rooster over a BR hen and a BSL hen all my babies were barred and I can't tell which one came from which........ they were great for butchering roos, nice big boys barely fit in the cones well over 7 lbs at 22 weeks, and the girls seem to be great layers so far, and also of nice size, teh eggs are a bit darker than a true BR, but not as dark as the BSL or Del hens... I can barely distinguish the babies from my BR hen.......... slight variations in the barring and the boys from my BSL hen had a few stray brown feathers, and lots of teal in the tail............Kim

 

[nicalandia]

Well my crosses this year were interesting a Del rooster over a BR hen and a BSL hen all my babies were barred and I can't tell which one came from which........ they were great for butchering roos, nice big boys barely fit in the cones well over 7 lbs at 22 weeks, and the girls seem to be great layers so far, and also of nice size, teh eggs are a bit darker than a true BR, but not as dark as the BSL or Del hens... I can barely distinguish the babies from my BR hen.......... slight variations in the barring and the boys from my BSL hen had a few stray brown feathers, and lots of teal in the tail............Kim

a Barred Rock over a Delaware will give you chicks that look like BR chicks, Black sexlinks crossed with BR chicks should look like BR chicks.. Why? its because of the Extended Black e allele BR carry, its the most dominant e allele. so a E/eWh B/- chick will look like a E/E B/- chick

 

[aoxa]

a Barred Rock over a Delaware will give you chicks that look like BR chicks, Black sexlinks crossed with BR chicks should look like BR chicks.. Why? its because of the Extended Black e allele BR carry, its the most dominant e allele. so a E/eWh B/- chick will look like a E/E B/- chick

When I crossed my Delaware hen with my BR rooster, chicks appeared to have two copies of the barring gene. The boys were lighter, girls were darker. Poor barring, but the rooster I used at that time was poorly barred as well.