Cochin Brahma cross

Discussion in 'General breed discussions & FAQ' started by Violetsfeathers, Mar 8, 2016.

  1. Violetsfeathers

    Violetsfeathers Chillin' With My Peeps

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    I crossed a buff brahma bantam roo over a mottled Cochin bantam hen. I've been doing some research and it seems like the boys would have pea combs and the girls would have single combs?
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    These are the two chicks I got out of it, they don't have names yet... ;)
     
  2. big medicine

    big medicine custom Brahmas

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    If both parents carry the proper genetics for their breeds correct comb, I believe you will get all pea combs of some sort on both sexes.
     
  3. Violetsfeathers

    Violetsfeathers Chillin' With My Peeps

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    There is a Cochin brahma cross hen here on BYC that has a single comb
     
  4. big medicine

    big medicine custom Brahmas

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    In that case the "Brahma" parent did not carry two copies of pea comb as a pure bred Brahma would.

    Pea comb is dominant over single comb. A bird with a single copy of pea comb will still have some form of pea comb, but only half of it's chicks will receive the pea comb gene. The other half could be single combed, depending on the genetics covered by the dominant pea comb, and the genetics of the other parent.
     
  5. Violetsfeathers

    Violetsfeathers Chillin' With My Peeps

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    I know single comb is dominant over rose comb.... Right?
    I Thought I saw some chicks with a single comb but can't be sure it's so tiny
     
  6. Violetsfeathers

    Violetsfeathers Chillin' With My Peeps

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    Chick #1
    [​IMG]

    Chick #2 (sorry pics are blurry)
    [​IMG]

    [​IMG]
     
  7. big medicine

    big medicine custom Brahmas

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    Nope. To my understanding single comb only occurs in the absence of pea, rose, or other dominant comb types.

    Breeding two single comb birds should produce only single combed chicks because if there where any other genes present they would have shown in the parents. Now I imagine there are all kinds of modifiers that can alter the size and shape of single combs. Such as the difference between the single combs on a Cochin verses a Leghorn.
     
  8. Violetsfeathers

    Violetsfeathers Chillin' With My Peeps

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    Oh, I bred a silver spangled Hamburg (rose comb) to a female black australorp (single) and both babies (a boy and a girl) were single combed
     
  9. big medicine

    big medicine custom Brahmas

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    Same deal, your rose comb was not carrying two copies of rose comb.
     
  10. Violetsfeathers

    Violetsfeathers Chillin' With My Peeps

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    So, if my brahma bantam roo was only carrying one pea comb gene, would it be sex-linked?
     
    Last edited: Mar 10, 2016

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