Polish Y comb genetics

Discussion in 'Exhibition, Genetics, & Breeding to the Standard o' started by Helen in the Desert, Mar 23, 2017.

  1. Helen in the Desert

    Helen in the Desert Chillin' With My Peeps

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    I have found genetics discussions on Pea, Rose, Single and Walnut combs, but nothing on Y combs. Anyone know anything? Is it a separate recessive gene? I am working on a project and really would like to know.

    Thanks
     
  2. nicalandia

    nicalandia Overrun With Chickens

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    The actual name of the genetic mutation is the Duplex comb or V shaped comb, the gene assigned to it it’s the D^V, D is for duplex and V for the V shaped comb, there is another mutation D^c which is recessive the D^V, the D^c is for the butter cup comb genotype, both of this duplex comb genetics are partially dominant to other genes, so if you cross a Polish with a single comb bird, the results will be like a dual single comb.

    For example if you cross a single comb bird with the genetic make up for the comb genes as: p+/p+ r+/r+ d+/d+
    With Polish, which is p+/p+ r+/r+ D^V/D^V
    The cross will be p+/p+, r+/r+ D^V/d+.
    Interestingly enough this cross(large single comb x V shaped comb) often produces birds with "Buttercup" type combs(D^c) but they don’t’ breed true of course(unlike the Buttercup breed).
    Here is an example
     
  3. Helen in the Desert

    Helen in the Desert Chillin' With My Peeps

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    If my F1 is a cross of a strait comb and a V comb, then I get buttercup combs - when I breed those back to a V comb do I get a high percentage of V combs? If I breed F1 to F1 do I get 50/50 V and strait?

    I have a project going that I am 4 years into and finally getting most of the phenotype I want, but I want V combs and am getting a combo of V and strait with a few buttercup/double. Now I sort of get why.
     
  4. nicalandia

    nicalandia Overrun With Chickens

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    When you cross F1 x F1: D^V/d+ x D^V/d+
    you will get 25% D^V/D^V(Proper V comb), 25% d+/d+(single comb) and 50% D^V/d+(butter cup comb)
     
    Last edited: Mar 29, 2017
  5. Helen in the Desert

    Helen in the Desert Chillin' With My Peeps

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    Thanks! Since so far that is all I have come up with, no other comb types I can use a simple square to figure the outcomes.
     

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