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Published on: May 10, 2019
Performance selection for Thoroughbreds racing in Hong Kong.
B D Velie1, N A Hamilton, C M Wade
1Faculty of Veterinary Science, University of Sydney, New South Wales, Australia.
Heritability analysis of Hong Kong Thoroughbred racing performance identified win time at 1600m as a highly heritable trait. While environmental factors influence performance, specific indicators can predict progeny success, similar to other racing environments.
Area of Science:
- Animal Genetics
- Equine Performance Science
- Quantitative Genetics
Background:
- Assessing genetic superiority in Thoroughbreds relies on racing performance indicators.
- Predictive accuracy of these indicators varies with population and recording conditions.
Purpose of the Study:
- Identify heritable racing performance indicators in Hong Kong Thoroughbreds.
- Evaluate the genetic basis of racing traits within a controlled environment.
Main Methods:
- Utilized a single trait animal model for heritability analysis.
- Analyzed performance data from 4947 Thoroughbreds racing in Hong Kong (2000-2011).
- Included fixed effects (sex, region) and random effects (trainer) in the models.
Main Results:
- Heritability estimates for finish position traits ranged from 0.01 to 0.06.
- Average handicap weight showed a heritability of 0.07 ± 0.03.
- Win time at 1600m exhibited a significant heritability of 0.52 ± 0.06.
Conclusions:
- Specific Hong Kong racing performance indicators can predict progeny or sibling performance.
- Despite a controlled environment, heritability estimates were comparable to less controlled racing settings.
- Environmental factors significantly impact racing performance indicators.
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