Genetics color question

[Krys109uk]

Really? I have four cuckoo silkies that I hatched out. Does this mean they are all going to be males?

If the mother was cuckoo & the father was not, then yes.​

 

[saladin]

Quote:
lol. If it behaves differently under certain circs then how can it be said to be the same.

It is most assuredly a different color in the females: just look at wheaten in OEGames and wheaten in Cubalayas. Anyone would be hard-pressed to explain how they are both called "wheaten."

 

[Germaine_11.20]

Quote:
If the mother was cuckoo & the father was not, then yes.

Thanks Krys. I guess time will tell.

 

[amazondoc]

Speaking of which --

I have a "wheaten" Marans cockerel (sold as wheaten) that started out with yellow wheaten down but now appears as a golden cuckoo. Since the breeder has both wheatens and golden cuckoos, I strongly suspect that a roo jumped the fence.

I'm busy today, but I'll try to post pics in a day or two.

 

[pips&peeps]

If these black birds are from my stock, you need to also know that they carry birchen genes (silver), which are completely hidden by black modifiers.

 

[Krys109uk]

lol. If it behaves differently under certain circs then how can it be said to be the same.

They've done the genome for poultry.

It is said that in the presence of melanising genes eWh acts as a recessive but without these influences will act as domiant. This can be observed by doing experimental matings using the same wheaten based bird.
Beore it was known for certain, Dr Clive Carefoot had observed from matings using a Light Sussex (wheaten) that in some matings the wheaten would appear as recessive & in other matings the wheaten would seem to be dominant.

I have a "wheaten" Marans cockerel (sold as wheaten) that started out with yellow wheaten down but now appears as a golden cuckoo.

A chap developed some Marans which he called "Golden Cuckoo" in US some 5 or so years ago. But the birds were not Golden cuckoo as the French have them. At the time they appeared to have originated from some type of cross involving cuckoo & a wheaten based colour. I thin originally they were referred to as crele then he changedthe name to "Golden Cuckoo" neither of which were accurate. They were not ER based. I see lots of pics of these birds; they seem to be reasonably frequent & they still do not seem to be consistent at the e-locus. A brown wing triangle if often to be seen in the males.

As Golden Cuckoo is such a very easy colour to make. I imagine some people must have made some proper Golden Cuckoo Marans but the other type are still about under the same name.​

 

[Sonoran Silkies]

Quote:
They've done the genome for poultry.
....

Well, when recessive white is present in two doses, it turns OFF other colour and pattern genes. Not that different an analogy.

 

[amazondoc]

Quote:
Interesting comment about the "fake" golden cuckoos, Krys!

In this case, the breeder sent me baby chick pics of his golden cuckoos. They are dark in chick down, not wheaten as my chick was.

 

[Krys109uk]

In this case, the breeder sent me baby chick pics of his golden cuckoos. They are dark in chick down, not wheaten as my chick was.

The ones I remember being developed about five or so years ago would have had a varety of chick down, in the region of three quarters would have been dark due to some parents being heterozygous for either gene at the e-locus. Apart from the brown wing triangle on some, there is a tendency, in some, for the colour to extend further down the bird than the neck hackles.​

 

[saladin]

I understand what is being said. I've read Carefoot. However, the wheaten you are speaking of does not appear to be the same color (wheaten) as that found in Cubalayas, for example.

It appears to me that we have one term, in this case wheaten, that actually refers to more than one pattern color. Taking the Cubalaya as an example again. In Germany the hens are not refered to as wheaten but as cinnamon.