Triple Crown-Bound Horse Breeders Start to Look to Genetics

Genetics are officially becoming a factor in the sports world.  In the ultra-competitive realm of horse racing, breeders are using more and more advanced methods to identify winning-caliber horses.  In particular, they have identified a "speed gene" that appears to be a great gauge of future performance.  They are seeking out more and more markers as time goes by.

http://www.scientificamerican.com/article.cfm?id=triple-crown-bound-horse-breeders-start-to-look-to-genetics