Marsbar Chick and autosexing

[house1917]

that’s a fancy bit of software! Looks like I may have all cockerels then - not a great start to getting a rainbow of eggs in my basket

Oh, this calculator isn't the best user interface, but it's addictive for us chicken lovers!! This spring I'm loading some of my favorite purebred eggs into the incubator- wheaten marans and welsummers. But also some crosses- olive eggers black copper marans and welsummers, and BCMs or Ayam Cemani on 'purebred' hens (Isbar, EEs, RIRs, etc). With all the combs, leg colors, and color combos, I'm hoping this calculator helps me determine heritage!

 

[aart]

I bought the eggs on eBay and the breeder stated they were CL females running with a marans, so I think not. They seller has a good reputation.

Now that I look back, it's been a few years, the males will be barred.

 

[house1917]

Actually looking at the calculator results - is it the other way round? Is the pullet barred

If you scroll down under the pictures, past all the genetics table, you'll see a white "Calculate Crossing" -- that will give you the offspring of the BCM/Crele paring!

High value web site, just a funky interface.

Actually looking at the calculator results - is it the other way round? Is the pullet barred?

 

[windyridgefarm]

This would be a sexlink cross not autosexing. males will have a white dot on their head

 

[Beth42]

Yep, they all turned out to be boys. No green eggs for me!!

 

[FlockVillemaire]

Decided to go for some marsbar chicks for their olive eggs (cross between Cream Legbar (mum) and French Copper Marans (dad). When the first one hatched it had such clear autosexing markings of a female cream legbar, we were pretty confident it was going to be a girl, however, 3 and half weeks later, it seems that Marcie may in fact be Martin...I'm guessing autosexing isn't so reliable when crossing.
View attachment 3464592View attachment 3464593(We have 2 more which are 10 days younger, but the markings weren't as clear so the jury is still out on those)

I've read:
Male = Barring
Female = Solidish Black/no barring
And both carry dark olive egger genes, but only 1/2 chance of blue-egged 2nd generation genetic chicks.
But what's their specific genetic chances M/F of passing darker brown bloom genes to their next generation chicks?

 

[FlockVillemaire]

Yep, they all turned out to be boys. No green eggs for me!!

But some of these roos' babies WILL have green/olive eggs. (I just don't know the PunnettSquare percentages.)

 

[Contentedlife]

When you do this sex link cross isn’t the rule that the dad influences the look of the baby girls the mom the look of the baby boys So barring shows up with boys and not the girls?

 

[Rhodebar Lover]

When you do this sex link cross isn’t the rule that the dad influences the look of the baby girls the mom the look of the baby boys So barring shows up with boys and not the girls?

Not exactly. Males are ZZ and females ZW. Meaning that males get a “Z” from each parent and females only from the father. So since barring is on that chromosome and the mother is barred, only her sons would inherit a copy. If the father is double barred and mother not, all offspring would be barred since the ”Z” goes to both genders

 

[FlockVillemaire]

Actually looking at the calculator results - is it the other way round? Is the pullet barred?

If you are using a CCL hen, she will have only one/single/unpaired "male" Z chromosome that only goes to her sons, while her puny "female" W chromosome would have none: so (dominant) B/+. The BCM roo will have no barring alleles to give at all: b/b. This means that male chromosome will ONLY go to her sons, while the daughters will be black. You can tell the barring allele in the hatchling sons by the white spot on their heads, while the girls will be solid. Later, as they grow their feathers, you will see the cockerels' barring show up. I just hatched 2 and got one of each. They follow this pattern perfectly. If other genetics are mixed in either parents' DNA, who knows what you will get???

If using another breed roo who had pale feathering, you might not be able to see the head spot. Or if the father was either hetero or homozygous for barring, all sex-linkage would completely disappear with barred or unbarred chicks of both sexes! His barred allele would go to either sex.