Whats the difference between Cuckoo and Barred?

[nicalandia]

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yes Barred birds have the slow feathering gene(Dominant Sex Linked K and tightly linked to the sex linked dominant S silver gene) and in Show Quality stock Columbian(Co) was found by Doctor R Okimoto but not in the hatchery lines..


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There is Also Sex Link Dilution that looks just like barring on hens...

 

[DMRippy]

Can someone explain what happens to the barring in BSL? I know the males are barred and so they only have one copy of the barring gene???? So what happens when you breed a BSL roo to a non barred hen? I know they don't breed true just trying to figure out why and what happens. Will the offspring breed true if they get the barring gene? or even if they don't get the barring gene do they carry it?

 

[Illia]

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BSL Rooster x non-barred hen = 50/50 barred or not barred in both genders.


Think of it this way -


Pure barred rooster x non-barred hen = all barred offspring, but the roosters carry one gene.

Barred Rooster carrying one gene (like a BSL) x non-barred hen = 50/50 but the hens are pure barred, roosters are half barred, however the hens will be more cuckoo in appearance.

 

[nicalandia]

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What's a BSL?

Genetic 101 ala Marvin...

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you have it the other way around..

you seem to know that Barring(B) is a Sex linked gene, but in this case Birds( fish and crustaceans,some insects and some reptiles) Males(roos) are the Homogametic ones(ZZ) and hens are Heterogametic ones(ZW) meaning males can have 2 copies of the berring gene and females can only only one.. or none if the rooster does not carry Barring...

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Barring is a Dominant gene so if you can't see Barring on black or colored birds that means is not there, but it could be hidden on white birds, like production white leghorns

I hope that helped..

Edit..
Illia always beats me to it.. I'll never be an educator that way..

 

[DMRippy]

BSL = Black Sex Link So the hen was barred.

will the offspring breed true? If I have a barred roo from him will all the chicks be barred from his son? Same thing with the non barred, they have no copies of barring right?

I think I am understanding that this BSL roo only carries one copy, that is what make him unique in breeding so none of his offspring will breed true either, right?

Y'all are a great help! This may be a good thing after all!

 

[DMRippy]

One more general barring question for some one that has only had bio 101. If the roos are zz and the hens are zw, if you cross a zz roo with barring on both z's with a non barred hen would you not get the same kind of problem from the roos? one z carries barring from the roo and the one from the non barred hen?

 

[Sonoran Silkies]

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What's a BSL?

Genetic 101 ala Marvin...

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you have it the other way around..

you seem to know that Barring(B) is a Sex linked gene, but in this case Birds( fish and crustaceans,some insects and some reptiles) Males(roos) are the Homogametic ones(ZZ) and hens are Heterogametic ones(ZW) meaning males can have 2 copies of the berring gene and females can only only one.. or none if the rooster does not carry Barring...

Quote:
Barring is a Dominant gene so if you can't see Barring on black or colored birds that means is not there, but it could be hidden on white birds, like production white leghorns

I hope that helped..

Edit..
Illia always beats me to it.. I'll never be an educator that way..

BSL is black sex link, and the males only have one copy of the gene due to the cross (barred hen to non-barred male)

 

[Sonoran Silkies]

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Sex-linked birds do not breed true. In all cases the male is split for the dominant gene, the hen carries the recessive one. A sex-linked hen will pass her recessive gene to all her sons. A sex-linked roo will pass the dominant allele to about half his offpring and the recessive to the other half, but there will be no gender distinguishment in who gets which. Breed enough chicks and you'll get about even numbers of each gender inheriting each allele.

 

[Sonoran Silkies]

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B/B crossed to b+/- will give B/b+ males & B/- daughters Since they will all have one copy of barring, you cannot tell the males from the females based upon barring.

 

[DMRippy]

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B/B crossed to b+/- will give B/b+ males & B/- daughters Since they will all have one copy of barring, you cannot tell the males from the females based upon barring.

Ok this is what i am understanding.... The pullets would be ok to breed and would breed true(barring or not because they only carry one copy). The roos would always NOT breed true for barring from a BSL roo. Even if breed to a barred hen because only half of the roos would have B/B the other half would be B/- and only test mating would show if barring in the roo was B/B.

Got it! I will not be able to use the Barred roos from this cross for barring!