Avoiding Lethal Whites
 
 

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Avoiding Lethal Whites

This is a discussion on Avoiding Lethal Whites within the Horse Breeding forums, part of the Horse Breeds, Breeding, and Genetics category

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    • 7 Post By DraftyAiresMum
    • 1 Post By JetdecksComet

     
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        08-07-2014, 02:29 PM
      #1
    Foal
    Avoiding Lethal Whites

    My trainer today was talking to me today about Lethal White foals during a group lesson. So I know what they look like and that they die soon after birth, but I was wondering what causes foals to be Lethal White and how you can avoid it when breeding.
         
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        08-07-2014, 02:35 PM
      #2
    Showing
    Testing for the frame overo gene (also known as the OLWS or LWOS gene) can prevent a lethal white foal.

    Lethal whites (or LWOS/OLWS) foals are created when you breed two horses who are positive for frame together. When you do this, you have a 25% chance of creating a lethal white foal.

    Because white patterns can hide (one member has a mare with a small star as her only white, yet she tested positive for frame), it's important to test any horse you suspect of carrying frame before breeding.
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    Wallaby, 2BigReds, Joie and 4 others like this.
         
        08-10-2014, 10:12 AM
      #3
    Weanling
    I'd go a step farther and say to test ANY horse, not just ones you suspect, if it is a breed that has shown to carry LWO. If either horse tests negative, then you can breed without fear of a lethal white foal.
    Wallaby likes this.
         

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