What exactly is the genetics on coloration of Jersey giants

[TheKindaFarmGal]

How would it be a mixed breed if the bird is the result of mating birds of different varieties within the same breed? Mixed breed would involve mating birds of different breeds. Be careful with your imprecise wording. You should use pictures.

No, a pure bred bird is one who breeds pure...which this would not be. There are, of course, some exceptions like BBS and chickens with different traits lethal when homozygous, such as tufts.

 

[gojira]

No, a pure bred bird is one who breeds pure...which this would not be. There are, of course, some exceptions like BBS and chickens with different traits lethal when homozygous, such as tufts.

Junebuggena is a very knowledgeable and respected member of this community. The OP was did word things in a slightly confusing way for some of us, but nobody needed to get upset about it.

This is not meant to attack anybody or start an argument. Have a good day!

I think you are confusing breeds and varieties. The OP only talked about one breed, but two varieties. White Jersey Giants were originally sports from Black Jersey Giants, so they likely only differ in one allele. They are the same breed, so mating one variety to the other does not create a mixed breed. The son mentioned in this post would be considered a Black Jersey Giant, but he would be heterozygous for recessive white.

 

[TheKindaFarmGal]

I think you are confusing breeds and varieties. The OP only talked about one breed, but two varieties. White Jersey Giants were originally sports from Black Jersey Giants, so they likely only differ in one allele. They are the same breed, so mating one variety to the other does not create a mixed breed. The son mentioned in this post would be considered a Black Jersey Giant, but he would be heterozygous for recessive white.

And that's what keeps him from breeding pure - yes, he has or should have the same body type, skin color, comb, etc. but he will not breed pure since his parents were at the very least not the same color (as far as feathers go). Sorry for the confusion.

 

[gojira]

And that's what keeps him from breeding pure - yes, he has or should have the same body type, skin color, comb, etc. but he will not breed pure since his parents were at the very least not the same color (as far as feathers go). Sorry for the confusion.

I take it that you are new to poultry, or at least poultry genetics? If this son were bred to Black Jersey Giant hens that were homozygous dominant at the recessive white locus, he would breed pure according to your way of thinking. If you breed a bird if one breed with another bird of that breed, you still have that breed, unless it is an Ameraucana apparently. You might not want to ask exhibition breeders, because they will cross breeds, and call the progeny purebred.

 

[M_coosae]

generally speaking without knowing your breeding history, Black is a dominant color and will mask all other traits and would recommend staying away from it or keeping very few if you do want the black genes to pass on. If you are willing to track your mating closely then you can still use them for f2 (second generation) crosses. Or you can do what I did and end up with too many black birds then go try to figure out why after the fact!!!

 

[TheKindaFarmGal]

I take it that you are new to poultry, or at least poultry genetics? If this son were bred to Black Jersey Giant hens that were homozygous dominant at the recessive white locus, he would breed pure according to your way of thinking. If you breed a bird if one breed with another bird of that breed, you still have that breed, unless it is an Ameraucana apparently. You might not want to ask exhibition breeders, because they will cross breeds, and call the progeny purebred.

Not new to poultry, but genetics, not quite a year of studying genetics by myself. So yeah, you're right, I have tons to learn and am very aware of that. You know much more than me!

Yes, I understand, and that's all true. In this case the owner is wanting Whites, not Blacks, and this rooster will not produce 100% whites. With blacks, it would be a totally different story, like you said. Though, he is a split, and as such approximately half of his offspring would be too. So they're still not pure genetically (not homozygous in all traits). They could possibly meet the SOP as far as phenotype goes, which is all that really matters in showing anyway.

 

[gojira]

Not new to poultry, but genetics, not quite a year of studying genetics by myself. So yeah, you're right, I have tons to learn and am very aware of that. You know much more than me!

Yes, I understand, and that's all true. In this case the owner is wanting Whites, not Blacks, and this rooster will not produce 100% whites. With blacks, it would be a totally different story, like you said. Though, he is a split, and as such approximately half of his offspring would be too. So they're still not pure genetically (not homozygous in all traits). They could possibly meet the SOP as far as phenotype goes, which is all that really matters in showing anyway.

So what you are saying is that poultry is mostly just mixed breeds? By your definition of purebred, very few poultry breeds in the Standard of Perfection would not be a mixed breed. In other species, there would be very few pure animals as well. So, in your mind, breeding a bird of a particular breed to a bird of the same breed, would produce mixed breeds, but breeding a bird of a particular breed to a bird of another breed would produce a purebred bird. Again, the OP has a purebred Black Jersey Giant that is heterozygous for recessive white. That is not close to being a mixed breed. People want to make this more complicated than it really is.

 

[Yorkshire Coop]

Ok peeps, let’s keep this thread on track please.

Thank you.

*BYC STAFF*