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UNDERSTANDING THE POWER OF THE X FACTOR 
Book II
 Signed by Marianna Haun
2001
Softcover

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UNDERSTANDING THE POWER OF THE X FACTOR
by MARIANNA HAUN

Patterns of Heart Score and Performance

2001 Softcover - 

252 pages - 6 X 9 inches

When THE X FACTOR was published in 1997, it documented the astonishing discoveries of large hearts in top Thoroughbred racehorses and a genetic link for those large hearts on the female X chromosome. This sequel presents the latest findings in heart score and pedigree research from the ongoing project conducted by equine cardiologist Dr. Fred Fregin, geneticist Dr. Gus Cothran and author Marianna Haun. Haun continues the fascinating story of the trail of the large-heart characteristic from the 19th century to the present day.

Featured are many pedigrees, photos and ECGs of famous Thoroughbreds that carry the large-heart characteristic, such as Northern Dancer, Cigar, Mr. Prospector and more, as well as Standardbred and Quarter Horse racehorses like Valley Victory and Dash for Cash. Certain physical characteristics have been found to be indicators of large hearts passed along generations. In this new work, Haun uses comparative photos and descriptions of sires and dams plus their progeny to illustrate the physical clues to the large-heart characteristic.

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