J. Anim Sci.
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J. Anim Sci. 1978. 46:60-68.
© 1978 American Society of Animal Science
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Factors Influencing Racing Performance of the Standardbred Pacer1

R. L. Hintz2 and L. D. Van Vleck

Cornell University, Ithaca, NY 14853

Abstract

Generalized least squares solutions were used to estimate effects of post position, track condition, purse within class of race, and breaking stride on time at finish of the Standardbred pacer. A total of 30,181 race records made during the 1972 racing season were analyzed. All effects were found to have a significant influence on time at finish. Differences between effects were generally uniform across age groups. Since post position, track condition, purse within class of race, and breaking stride were found to have a substantial influence on racing performance, these factors should be considered when estimating a horse's racing ability.

Variance components pertaining to horse and driver effects were estimated using Henderson's Method 2. Repeatability estimates of horse and driver performance for the various age groups ranged from .2 to .7, with an average of .43. The average repeatability indicates that horse and driver variances account for 43% of the total variation.

Footnotes

1 The authors wish to express their appreciation to Dr. Walter Harvey and Dave Jones, Ohio State University, and Dennis Nolan, United States Trotting Association, for their assistance in obtaining these data. The cooperation of the Dairy Records Processing Laboratory, Ithaca, NY, and the assistance of Robert Anderson and Dr. Harold Hintz, Cornell University, are appreciated.

2 Present address: Department of Animal Science, Oklahoma State University, Stillwater 74074.






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Copyright © 1978 by the American Society of Animal Science.