Gold neck D'uccle vs regular mille

[TurtleFeathers]

Quote:
Here's what I'm finding (vanDort/Hancox "Genetics of Chicken Colours")
Mille Fleur:
eb/eb s+/s+ Db/Db (Co/Co) Pg/Pg Ml/Ml (Mh/Mh) mo/mo
or
eWh/eWh s+/s+ Db/Db Pg/Pg Ml/Ml (Mh/Mh) mo/mo

Golden Neck:
eb/eb s+/s+ Db/Db mo/mo I/I or I/i+ or Bl/Bl
"In this color vairety the black of the Mille Fleur is replaced by white due to one dose of dominant white (I/i+) or by homozygous blue or splash (Bl/Bl). In the latter case (it) is a by-product of Blue Mille Fleur."

Hope that helps.

Sorry Coopa - I don't speak genetic code! LOL! Can you repeat that in English please???

I understand why the black in the MF is splash or white in a golden neck (and I know that the white in a MF stays the same regardless), but I just don't get why the gold is different.

 

[Coopa Cabana]

I'm still trying to get just the smallest of grasps on the genetics codes, but I can give it a try. Regarding the base color of the birds, the main difference in the codes below is the Ml (Melanotic), I (Dominant White) and Bl (Blue) genes.

Melanotic is an "Extender of Eumelanin". "This extends the eumelanin (black) pigment into typically pheomelanic (red) areas. These genes tend to darken birds, increasing eumelanin, most notably in the sex-feathered area of male birds." (Color Forms of the Domestic Fowl, by Brian Reeder)

Both the I (Dominant White) and Bl (Blue) genes in the Golden Neck code are "Diluters of Eumelanin", which will turn the eumelanin (black) pigment into lighter shades.

The Db (Dark Brown or 'Ginger') below in the codes of both varieties is an Extender of Pheomelanin. It will extend the (red) into the typically (black) areas, most notably on the breast and body.

There are only 2 different pigments found in all poultry: Eumelanin (black) and Pheomelanic (red). There is still much discussion as to whether or not the Pheomelanic is Autosomal.

The Mille Fleur can also carry the Mh (Mahogany) gene, which the Golden Neck does not. Mahogany is an Intensifier of Pheomelanin, and will make the red darker on the s+ birds.

Did all that help or hurt?

Everything is paraphrased from my genetics books - which I still have to refer to CONSTANTLY.

 

[Sonoran Silkies]

Quote:

 

[Sonoran Silkies]

I don't think there is any doubt about the existance of autosomal red (pheomelanin). What is in question is whether it is a single gene, multiple genes, dominant, recessive, etc.

 

[alibra]