The "What Color Is My Chicken?" thread! Calling all color experts!

[Henk69]

No, the information I posted was from Ziel and Hollanders paper " Dun, a new plumage-color mutant at the I-locus in the fowl (Gallus gallus)"and " The Dominant white, Dun and Smoky color variants in chicken are associated with insertion/deletion polymorphisms in the PMEL17 gene. I posted wild type- it was wild type at the dominant white locus not the E locus.

[FONT='times new roman', serif]Tim[/FONT]

Indeed...

Now I am confused.


The article (2004)
"The Dominant white, Dun and Smoky Color Variants in Chicken Are Associated With Insertion/Deletion Polymorphisms in the PMEL17 Gene"
states that:
Smoky gives a grayish phenotype and is recessive to Dominant white but partially dominant to the wild-type allele

While Rokimoto at the-coop (in 2003) says:
We list it as a dominant allele because we can detect it in I/I^Sm heterozygotes. It is a strange allele. It is dominant to dominant white in both chick down and adult plumage, but it is recessive to the i+ allele in adult plumage, but not in the chick down.

Note that Dr Okimoto is a co-writer of the article!

 

[Meara]

If anyone has pictures of these I^S birds please post them!
Also, are there any breeders who are working with this mutation?

 

[Meara]

P.S. To help with some other questions, the 'blue' Cochin may be a smokey, if he and his hens never produce B/B/S offspring. and the EE hen I think is Khaki (Blue/Lavender, or Chocolate/Blue)

Anyone else concur with Emily about the EE hen (pictured in post #95)?

 

[tadkerson]

Indeed...

Now I am confused.


The article (2004)
"The Dominant white, Dun and Smoky Color Variants in Chicken Are Associated With Insertion/Deletion Polymorphisms in the PMEL17 Gene"
states that:
Smoky gives a grayish phenotype and is recessive to Dominant white but partially dominant to the wild-type allele

While Rokimoto at the-coop (in 2003) says:
We list it as a dominant allele because we can detect it in I/I^Sm heterozygotes. It is a strange allele. It is dominant to dominant white in both chick down and adult plumage, but it is recessive to the i+ allele in adult plumage, but not in the chick down.

Note that Dr Okimoto is a co-writer of the article!

I would go with the paper- it was read by more than one person and published. It may be that Ron typed in the wrong thing and did not notice. It happens. I am going with the paper. It is not that big of a deal. No one is working with smokey.

Tim

 

[Henk69]

I would go with the paper- it was read by more than one person and published. It may be that Ron typed in the wrong thing and did not notice. It happens. I am going with the paper.

Tim

Fair enough, but Harrell Sellers explicitly asked Ron in that topic if he should update his website (now at sellers.kippenjungle.nl) by a rephrased text and Ron was affirmative. I can upload the html if needed.

 

[Henk69]

Found it:
http://www.the-coop.org/forums/ubbthreads.php?ubb=showflat&Number=53951&page=1

Also has a picture of a smoky hen

 

[Lovely Emily]

Anyone else concur with Emily about the EE hen (pictured in post #95)?

I do!

 

[Meara]

Quote:

 

[tadkerson]

Henk,

After reading Ron's commentary and seeing the pictures, I believe I will go with Ron's version of the allelic relationships.

Tim

 

[Meara]

So is there any chance that I^S has popped up independently in flocks outside of the lab here in the U.S. or elsewhere? Has anyone looked? If it arose once in a study flock then I would not discount the chance of it occurring elsewhere given the number of flocks and the number of years that chickens have been domestically bred.
And just out of curiosity are there breeders or researchers who scan domestic flocks for possible as yet undiscovered color mutations?