Explain genetics of "dark, partridge, black copper", and more..

Discussion in 'General breed discussions & FAQ' started by gallorojo, Oct 20, 2009.

  1. gallorojo

    gallorojo Chillin' With My Peeps

    Oct 15, 2009
    Hello, I'm just a bit confused regarding the differences in color pattern, and genetics, for the color "dark" as in dark cornish or asils, "partridge", as in rocks, cochins, etc, and" black copper", as in marans. These all seem pretty similar to me, how are they different, and how do they work genetically? A related question is this.. I have a rooster who is a mix of oegb, possibly with some japanese bantam thrown in, and his color seems to match "ginger red" the closest. I crossed him with a partridge rock bantam, and all the resulting roosters look exactly like partridge rock roosters, while the hens have the color and pattern of a black breasted red ( not wheaten!), instead of having partridge color. Anybody able to explain this? I assume it's some sort of sex linkage thing?
  2. michickenwrangler

    michickenwrangler To Finish Is To Win

    Jun 8, 2008
    NE Michigan
    Partridge gene is somehow tied to gold-lacing. I have an article around here somewhere about it. I'll read it tonight and get back to you.

    Not sure about others.
  3. blackdotte

    blackdotte Chillin' With My Peeps

    Nov 18, 2008
    The hobby name 'Dark' in Indian (Cornish) Game is Double laced, in these birds it is usually based on the Wheaten gene eWh, but also segregates Brown eb in the USA.
    Genotype is eWh/eWh (or eb/eb) Pg/Pg Co/Co Ml/Ml on a gold s+ base.

    Hobby name 'Partridge' in Rocks,Wyandottes is Pencilled, in these birds the genotype it is eb/eb Pg/Pg on a gold s+ base.

    Hobby name Black Copper in Marans is a Melanised Mahogany Birchen, genotype is
    ER/ER Mh/Mh Ml/Ml on a gold s+ base.

    OEG is e+ Duckwing, e+ ,eWh, eb & ER males are all Black Breasted Red in pattern,
    there is no such colour pattern as a Black Breasted Red hen. e+ hens are salmon breasted Gold Duckwing (hobby name Partridge), Wheaten are the wheaten pattern, eb Brown are brown breasted coarsely pencilled, and ER Birchen have gold in the neck hackle and lacing on the breast of an otherwise black bird. A Brown Red in the SOP.

    Ginger can be created on e+ by the addition of either or both Columbian restrictors
    Columbian Co or Dark Brown Db.
  4. amazondoc

    amazondoc Cracked Egghead

    Mar 31, 2008
    Lebanon, TN
    Quote:I hate the way that so many color names are applied differently in the different breeds!

    In US araucanas, at least, e+ hens with gold are labeled as BBR. e+ hens with silver are labeled as duckwing.

    It all gets so confusing! [​IMG]
  5. Henk69

    Henk69 Chillin' With My Peeps

    Nov 29, 2008
    Groesbeek Netherlands
    Dark indians should not have columbian Co/Co.
  6. gallorojo

    gallorojo Chillin' With My Peeps

    Oct 15, 2009
    Thanks, this has been helpful, I've been playing with the color calculator and I think i have got it straight in my head now.
  7. tadkerson

    tadkerson Chillin' With My Peeps

    Jul 19, 2008
    I checked my book on indian game or dark cornish. I am currently working on the genotypes of all the APA birds.

    All cornish carry the following: yellow skin w/w , pea comb P/P r+/r+, dermal melanin inhibitor dermal Id/Id or Id/_W , yellow shanks due to Id and w, genes for brown egg shells o+/o+, genes for pearl eye color.

    dark cornish include :
    ♀ Double Laced
    ♂ Dark Non Laced

    wheaten ey/ ey or ewh/ewh, melanotic linked with pattern, Ml-Pg/Ml-Pg, gold ♂ s+/s+ or S/s+ and ♀ s+/_w, charcoal Cha/Cha, mahogany Mh/Mh, genes for dark slate under color most likely due to Cha (Author's opinion)


    Henderson. E.W., 1956. - Notes on the Inheritance of White Laced Red of Cornish. Poul-try science., 35:13-16

    American Standard of Perfection, 1998. American Poultry Association.

    Carefoot WC. 2001. Inheritance of the black hackle of the Indian Game bantam. Br Poult Sci. May;42(2):274

    Jeffrey, E.P. 1999. Bantam chickens. P177. Hampshire:Spur Publications Company

    Smyth, J.R.Jr., 1990. Genetics of Plumage, Skin and Eye Pigmentation in Chickens, ed. R.D. Crawford, pp.127 . Amsterdam:Elsevier

    Last edited: Oct 21, 2009
  8. blackdotte

    blackdotte Chillin' With My Peeps

    Nov 18, 2008
    Thanks Henk for correcting my typo, no Co. (Old age creeping in LOL)
  9. LaLoomis

    LaLoomis Out Of The Brooder

    Jan 13, 2009
    Los Angeles, CA
    I have silver penciled rocks that I thought had the same patterning as dark Brahmas. It also looks the same as partridge but a different color.

  10. Krys109uk

    Krys109uk Chillin' With My Peeps

    Silver pencilled rocks are, essentially the same colour as dark brahmas, & silver pencilled wyandottes. Partridge rocks are much the same but with gold instead of silver, & in US, I think they have mahogany. Partridge wyandottes & partridge cochins are the same colour as the rocks. There are also "gold brahmas" in EU which is a gold version of the dark brahma.

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