Blue Australorp x Blue Star = barred chick?

[imacowgirl2]

Blue Stars from Ideal are a cross between a Blue Andalusian and a barred rock, according to their website:

If a Blue Star hen was bred to a Blue Australorp rooster, could that pairing produce a cockerel that is colored like a barred rock?

 

[The Moonshiner]

No

 

[NatJ]

The barring gene makes white lines across the feathers, and also makes a white dot on the head of the chick. The barring gene is on the Z sex chromosome, so careful choice of parents lets people produce sexlink chicks (where one gender has barring and the other does not, so they can be sorted by their appearance from the time they hatch.)

For that cross, they use a Barred Rock hen, and a Blue Andalusian rooster.
The male chicks have barring (indicated by the "white dot on the head" in the description) and the female chicks do not.

If you cross a Blue Star hen (no barring) with a Blue Australorp rooster (no barring), you get chicks with no barring. They might be black, blue, or splash, but they will not have barring.

If a Blue Star hen was bred to a Blue Australorp rooster, could that pairing produce a cockerel that is colored like a barred rock?

If you have a cockerel colored like a barred rock, he must have at least one parent with barring.

 

[Guy4God]

Wouldn't a blue star hen still carry a barring gene?

 

[The Moonshiner]

Wouldn't a blue star hen still carry a barring gene?

Not if the sire was a Blue Andalusian

 

[NatJ]

Wouldn't a blue star hen still carry a barring gene?

No. Males have one barring gene and females have no barring gene-- that is what makes them sexlinks, with males and females that can be sorted by color at hatch (males have a light dot on their head and females do not.)

Barring is a dominant gene. Any chicken with the barring gene will show white barring on its feathers. Of course that is more obvious on dark colors like black or blue and less obvious on lighter colors.

 

[Guy4God]

Ok. But barred rock females carry 1 or 2? So if I bred a blue barred male to a black barred female....I would get male and female that have barring?

 

[The Moonshiner]

Ok. But barred rock females carry 1 or 2? So if I bred a blue barred male to a black barred female....I would get male and female that have barring?

Barring is a sex linked gene. With the females they only get a gene from their fathers and only pass it to their sons. Females either have the barred gene and pass it on or they don't have it and don't pass it on.
For males it's like any other gene. They get 2 copies. One from each parent and they pass one of the two genes to both sexes of offspring.
If your male has two barred genes and is bred to a barred female then yes all offspring (both sexes) will be barred.
If your male only has one barred gene and is bred to a barred female all male offspring will be barred. All will be barred but half will only have one barring gene while the other half will have two.
The female offspring will be split, half will have barring but half will not.