Sex- linked Information

[dannyisforreal]

So does anyone know the combination to make isabrowns?

 

[nicalandia]

If you cross the gold males to the silver females, you get the equivalent of the original cross that create ISA's, right?
Or, could I use the silver hens with a Welsummer roo to get sex links with darker eggs?

wow you are so lucky, Yes if you cross the F1 Silver Pullets with the F1 Gold Males you will get the equivalent of the Original Cross, with 100% ISA Brown genetics, meaning you will not lose any laying traits.

you could use the Silver hens with Welsummer roo to get Sex links that will lay Dark eggs, they will lay much better than your average Welsummer but I think they will not lay as good as ISA but they will be right up there in laying traits

 

[nicalandia]

So does anyone know the combination to make isabrowns?

No, its a Trade Secret, that cost millions of dollars in research to come up with about the best egg laying hens............. so no you will never now the exact combinantion...


BUT... Thanks to Mendelian Laws this Traits can be reproduced using what we know about backcrossing and genetics, we can re-produce the same ISA Browns Pullets using their own genetics, getting your hands on an ISA Brown Roo would be the best rout, But if the Females are the Only birds you could get your hands on, one can use simple mendelian laws to re-produce this exceptional layers.

 

[dheltzel]

It's more than just a secret about which breeds are crossed, that's probably a RIR roo over a RIW hen, but the actual strains are kept as closed flocks and selected for their ability to create the best hybrid progeny, So any old strain of RIR and RIW will not produce a hen as efficient as a real ISA.

Marvin, if you re-created the red and gold lines, wouldn't the resulting sex-link have less heterozygosity than the real ISA's? It seems like you'd find at least some small impact of the inbreeding. Maybe it would be negligible.

The red sex links I have access to may not be true ISA's, but they are exceptional layers. The hatchery sells them at prices where because of quantity discounts the males chicks are quite literally free (maybe higher postage, but that is all). We bought straight run and let the males all free range, They get really big when given room to grow. Some recent catches have had spurs nearly 4 inches long. I handle them with care, they don't appreciate being caught in the dark, LOL.

 

[nicalandia]

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Marvin, if you re-created the red and gold lines, wouldn't the resulting sex-link have less heterozygosity than the real ISA's? It seems like you'd find at least some small impact of the inbreeding. Maybe it would be negligible.

It would be Negligible and can be Mitigated by introducing unrelated ISA brown pullets to the breeding stock, what we would need to do is first establish the Silver Side of this cross, by crossing the ISA Brown Male(S/s+) of this cross to ISA Brown pullets, get that 50% Silver females and mate them back to ISA Brown Males(S/s+) to get a Pure S/S male, once this "Silver" Isa line is established any impact homozygosity (as opposed of Heterozygosity ) would be mitigated by breeding that line to the abundant flow ISA Brown pullets, heck we can even enjoy some of the Advancements the industry does on these strains of ISA (they need to keep selling this pullets to make a profit) by simply mating our "Silver Line ISA" to improved ISA Browns they come up with

 

[chicken pickin]

Would I be correct to say that any daughter offspring of a Cream Legbar rooster, even if her feathers don't show barring, will have the barring gene. And If that is indeed the case will she 100% pass that barring gene to all of her sons there for creating a sexlink(obviously using the correct rooster to cross her with).

This is what I thought was correct since I hatched eggs and the chicks were black and the others were black with white head spots. But as they age, they are 6 weeks old, The one I assumed was to be a pullet has quite a large comb similar to her brothers I feel like.

 

[nicalandia]

Would I be correct to say that any daughter offspring of a Cream Legbar rooster, even if her feathers don't show barring, will have the barring gene. And If that is indeed the case will she 100% pass that barring gene to all of her sons there for creating a sexlink(obviously using the correct rooster to cross her with).

That is true if the CL is homozygous for the barring gene

This is what I thought was correct since I hatched eggs and the chicks were black and the others were black with white head spots. But as they age, they are 6 weeks old, The one I assumed was to be a pullet has quite a large comb similar to her brothers I feel like.

if you crossed a black male to that CL pullet or that CL hybrid pullet there is No Way there could be a Solid Black Rooster coming from that cross Just not possible..

 

[lonnyandrinda]

Would I be correct to say that any daughter offspring of a Cream Legbar rooster, even if her feathers don't show barring, will have the barring gene. And If that is indeed the case will she 100% pass that barring gene to all of her sons there for creating a sexlink(obviously using the correct rooster to cross her with).

This is what I thought was correct since I hatched eggs and the chicks were black and the others were black with white head spots. But as they age, they are 6 weeks old, The one I assumed was to be a pullet has quite a large comb similar to her brothers I feel like.

A cream legbar rooster SHOULD have two barring genes. Each offspring, female or male, gets one. Then yes daughters give a barring gene only to their sons. If she is crossed with a NON BARRED rooster you should get black sexlinks (black females barred males). Hm. Can you post a picture of the pullet in question?

 

[chicken pickin]

That is true if the CL is homozygous for the barring gene


if you crossed a black male to that CL pullet or that CL hybrid pullet there is No Way there could be a Solid Black Rooster coming from that cross Just not possible..

Thank you that is what I thought but just wanted to be 100% sure.

 

[chicken pickin]

A cream legbar rooster SHOULD have two barring genes. Each offspring, female or male, gets one. Then yes daughters give a barring gene only to their sons. If she is crossed with a NON BARRED rooster you should get black sexlinks (black females barred males). Hm. Can you post a picture of the pullet in question?

Thank You!

Yes I will take their pic here in a few mins.