Color genetics thread.

[Violetsfeathers]

Hello?

 

[Wappoke]

Hello?

Hello to you. If the bird is infected with the virus that causes the lymphoma, I am pretty sure you would notice that the bird has problems seeing. After 9 months, you would notice vision loss to total blindness. Mareks should also cause some paralysis- if the bird is healthy, they do not have the disease.

The eye of your bird looks good to me- the color is off but the iris looks good. They may have some kind of viral infection but I do not believe it is Mareks. Herpes viruses love nerve tissue and will set up house in the nervous system. It still could be a virus but the birds immune system is keeping the virus suppressed.

 

[Violetsfeathers]

Is it possible for a chicken to have green irises and not have anything wrong with it. If so what % chance?

 

[Violetsfeathers]

Is it possible for a chicken to have green irises and not have anything wrong with it. If so what % chance?

 

[harmesonfarm]

I do not think that green eyes result in a bird having cancer. Bay coloured eyes are a breed colour for BCM birds. I would think that green coloured eyes would be more of a mutation than a indication of cancer. Just my opinion though, i'm no expert.

 

[Violetsfeathers]

I do not think that green eyes result in a bird having cancer. Bay coloured eyes are a breed colour for BCM birds. I would think that green coloured eyes would be more of a mutation than a indication of cancer. Just my opinion though, i'm no expert. 

Thank you
Is there anyone who disagrees? I want to be sure.

 

[Sonoran Silkies]

Mareks disfigures the pupil, not the iris. Simply having green eyes is no indication of cancer. If there are no symptons to indicate anything wrong, you shouldn't worry.

 

[Violetsfeathers]

Mareks disfigures the pupil, not the iris. Simply having green eyes is no indication of cancer. If there are no symptons to indicate anything wrong, you shouldn't worry.

Okay whew!

So it is a mutation then? Or a recessive gene? Cuz I would like to breed more.

 

[Wappoke]

Okay whew!

So it is a mutation then? Or a recessive gene? Cuz I would like to breed more.

Yes the eye color could be the expression of a recessive gene. If this is the case, cross her with a normal eye color male. You only need to hatch enough eggs to produce a male. Then back cross her to her son. If it is a recessive gene that is producing the eye color, then some of the back cross offspring will have the abnormal eye color.

Studies of eye color in the United States have found a large variation in the eye color in Rhode Island Red varying from light gray ( very low frequency) to reddish bay. Studies in Africa have reported chickens with green eye color (low percentage)- the cochin and brahma have been selected to produce offspring with a standard eye color. Any offspring that expressed a different eye color would not have been used in a breeding program. The eye color of your birds would have been excluded from a breeding program in an attempt to eliminate the expression in future offspring.

Eye color has a genetic component and other components that influence the eye color. Eye color can be influenced by the E locus allele (extended black vs wheaten), a possible dominant inhibiting sex-linked gene , sex-linked dermal melanin allele and sex-linked dermal melanin inhibitor allele( not the same as the previous gene).

Pearl eye color (found in game birds) appears to be recessive to normal eye color.

It appears that eye color is very complicated because of pleiotropic and polygenic expression.

The eye develops from the same embryological germ layer as the skin. This would lead one to hypothesize that the genes that effect pigmentation in the skin and feathers would also effect the mechanisms that produce pigmentation in the eye. Research has shown the extended locus of the chicken is a part of the melanocortin system which regulates various functions in the body. This is why eye color is so complicated- lots of variables acting on a single expression.

 

[Violetsfeathers]

Yes the eye color could be the expression of a recessive gene. If this is the case, cross her with a normal eye color male. You only need to hatch enough eggs to produce a male. Then back cross her to her son. If it is a recessive gene that is producing the eye color, then some of the back cross offspring will have the abnormal eye color.

Studies of eye color in the United States have found a large variation in the eye color in Rhode Island Red varying from light gray ( very low frequency) to reddish bay. Studies in Africa have reported chickens with green eye color (low percentage)- the cochin and brahma have been selected to produce offspring with a standard eye color. Any offspring that expressed a different eye color would not have been used in a breeding program.  The eye color of your birds would have been excluded from a breeding program in an attempt to eliminate the expression in future offspring.

Eye color has  a genetic component and other components that influence the eye color.  Eye color can be influenced by the E locus allele (extended black vs wheaten), a possible dominant inhibiting sex-linked gene , sex-linked dermal melanin allele and sex-linked dermal melanin inhibitor allele( not the same as the previous gene).

Pearl eye color (found in game birds) appears to be recessive to normal eye color. 

It appears that eye color is very complicated because of pleiotropic and polygenic expression.

The eye develops from the same embryological germ layer as the skin. This would lead one to hypothesize that the genes that effect pigmentation in the skin and feathers would also effect the mechanisms that produce pigmentation in the eye. Research has shown the extended locus of the chicken is a part of the melanocortin system which regulates various functions in the body. This is why eye color is so complicated- lots of variables acting on a single expression. 

...

I'm not sure I understand all that.

The only thing is if it's recessive, BOTH of the ofspring had green eyes... so... if it was recessive only 25% of the babies would have green eyes? But 100% had green eyes so it make me wonder if I bred the parents again, would all the babies have green eyes again?
It's confusing. But I want to breed the parents again and see what happens.