Merikle Waters Paints & Quarters

Producing & Training Quality Family And Show Horses

Lethal White (Frame) Overo
Information and helpful links


We have provided some helpful links for those


 of you who want to learn about this gene.  



Millenium Miracle & Tristans Millenium both carry


 the "lethal white overo gene", which is also


responsible for their beautiful coat


patterns. When they are crossed with another


 carrier of the gene, there is a 25% chance


 they will produce a lethal white foal (Always


 ending in death). With Millenium Miracles color


 rate, as well as his large amount of frame


 patterned progeny, if you choose to take a


 gamble your odds getting a lethal white when


 breeding a frame carrying mare is about 75%.


 We do not reccomend you take the risk,


testing to be sure of your mares frame overo


 status is cheap easy insurance.




 

It is important to know that this is NOT a disease


 or defect. It is a color gene that only produces


 color when in heterozgous form (one copy).


Only if Sire and Dam both have the gene, and


 BOTH pass on the gene does it result in a


 Lethal White Foal. Due to frame overo having


 varying pattern expressions, a "solid" or a


 tovero can carry frame as well. We


 reccomend testing on all quarter horse mares,


 breeding stock paints along with regular


 registry. The frame pattern is also in


 thoroughbred lineage, and while less common


 can be a risk as well.







We feel that it is an individual choice and want to


 provide you with the best information available.


 Please visit the following links and if you have


 further questions or concerns, contact us


 anytime!




The filly above tested to carry frame overo





Frame overo hides well within the tobiano


pattern, often going unnoticed even after


 registration with APHA. It is good to keep in


 mind how many horses are registered as the


 wrong pattern. This leaves potential for

 

"tobiano" horses, despite a pedigree full of


tobiano horses, the potential of carrying frame


 overo as well.







Frame overo examples





Examples of frame overo at work.

Some with the combination of other genes.

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