Bluish ghost barred gene?

Discussion in 'General breed discussions & FAQ' started by crperdue, Aug 17, 2010.

  1. crperdue

    crperdue Chillin' With My Peeps

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    Sd -- Sex Link Dilution. Reported by Munro (1946) Closely associated with Sex Linked Barring (B) Sd males are barred, Sd Sd males are white. Sd females are bluish ghost barred, sd females are barred.

    Does anyone have any information on this gene?

    such as:
    - Whats the common name for this color/pattern?
    - What breeds have this color/pattern?
    - Do you know any hatcheries/breeders that have them?
    - Do you know of any pics online of this?

    Thanks!

    (PS - yes, I have tried google, etc. no luck)​
     
  2. Henk69

    Henk69 Chillin' With My Peeps

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    As far as I know sexlinked dilution is a different mutation on the barring locus.
    B^sd = sexlinked dilution
    B = barred
    b+ = not barred
    Order of dominance B^sd > B > b+

    So I don't get the "sd females are barred"
     
  3. RAREROO

    RAREROO Overrun With Chickens

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    Im not sure if this is exactly what you are talking about but here is a ghost barred cockerel that I had.

    [​IMG]
    [​IMG]

    These are the parents Black Sexlink roo ( Buff Orp X Barred Rock ) and Rhode Island White hens ( Dominant White with silver genes.)
    [​IMG]
     
  4. Henk69

    Henk69 Chillin' With My Peeps

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    That kind of ghost barring is the slightly gray dominant white pattern on the silver groundcolor.
     
  5. crperdue

    crperdue Chillin' With My Peeps

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    I think the one I'm looking for has blueish barred females
    with solid white males.
     
  6. blackdotte

    blackdotte Chillin' With My Peeps

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    Munro refered to this as "a true breeding Blue" because the hemizygous female B^sd , and heterozygous males B^sd/ (B or b+) have light blue barred plumage; the homozygous males B^sd/B^sd resemble Dominant White birds, but they are epistatic to pheomelanin (gold) which Dominant Whites aren't. As far as I know it has no common name.
    This might rarely be found in any Barred/Cuckoo breed, but seems much more common in commercial meat birds. Can't help with a photo.
    As Henk said the cockerel shown is not B^sd
    David
     
  7. slackwater

    slackwater Chillin' With My Peeps

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    Oh, my...there was a day when I would have understood all of this (post-college, pre-kids). Now y'all are making my head hurt. Fascinating stuff, though!
     
  8. crperdue

    crperdue Chillin' With My Peeps

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    The only thing I can find online is that this is somehow associated with
    California Greys (sometimes call production blacks). Has anyone ever
    heard of a blue California grey? Or a white California grey rooster?
     
  9. crperdue

    crperdue Chillin' With My Peeps

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    I may have found the breed!

    Fifty Five Flowery

    This is an autosexing breed. Males are white
    while females are barred with a light grey/blue
    color. Described as a rather big chicken. They
    lay large, white eggs.

    That really sounds like the B^SD gene! And the
    large size and white eggs are a huge bonus.

    Has anyone heard of this breed or know anywhere
    I may be able to get some eggs/chicks/adults/anything?
     
    Last edited: Aug 20, 2010
  10. crperdue

    crperdue Chillin' With My Peeps

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    Quote:The females would be either Sd/- or sd/-. Since they are already B/-
    for the barred gene as well, then the ones with Sd are "ghost" barred
    while the ones with sd are just normal barred. Well, at least thats
    my guess.
     

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