Free Genetics Book

Discussion in 'General breed discussions & FAQ' started by tadkerson, Oct 7, 2009.

  1. briarpatchfarms

    briarpatchfarms Songster

    Jul 24, 2008
    Grayson, Ky
    Thanks for posting very helpful
     
  2. tadkerson

    tadkerson Songster

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    Quote:There may be 12 genes that cause brown egg color- brown eggs are genetically white also, so brown eggs are o+/o+. Brown egg pigments are normally added to the outside of the shell.

    Chickens that produce white eggs do not have any brown egg genes and are o+/o+, some have recessive sex linked genes ( only one paper on this and I am too lazy to go find it) that work to eliminate color in egg shell. No pigments are added to the shell or the outside of the shell. Found in white leghorn.

    Blue eggs are produced by birds that carry O/O or O/o+. The O gene is a dominant gene that adds blue pigment to the shell.

    Green eggs are produced by a bird that has a blue egg shell gene or genes and brown egg shell genes. Darker green has more brown pigment added to the out side and light green has a little brown pigment added to the shell.



    Tim
     
    Last edited: Oct 7, 2009
  3. Birch Run Farm

    Birch Run Farm Biddy up!

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    VERMONT
    [​IMG]

    Thanks Tim!
     
  4. lauralou

    lauralou Songster

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    Central Virginia
    Awesome! Thanks so much. [​IMG]
     
  5. JanieMarie

    JanieMarie Songster

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    Georgetown, Minnesota
    Thanks for posting this link (I think) All this genetics stuff makes my head spin!! [​IMG]
     
  6. blackdotte

    blackdotte Songster

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    It's a pity the whole book is not available on line. It is now 19 years since it was published
    David
     
  7. wegotchickens

    wegotchickens DownSouth D'Uccles & Silkies

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    Sevier County, TN
    Quote:I concur!

    But thatnks for posting it, Tim!

    Would you mind posting the bibliographic info? [​IMG]
     
    Last edited: Oct 9, 2009
  8. tadkerson

    tadkerson Songster

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    This is from a web site. I can not load the reference.

    Tim
     
  9. chookster77

    chookster77 In the Brooder

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    Apr 22, 2009
    Poultry Breeding and Genetics, R. D. Crawford

    * Hardcover: 1123 pages
    * Publisher: Elsevier; 1 edition (January 1, 1990)
    * Language: English
    * ISBN-10: 0444885579
    * ISBN-13: 978-0444885579
    * Product Dimensions: 9.4 x 6.4 x 1.9 inches
    * Shipping Weight: 4.8 pounds
     

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