Stationary performance testing of stallions from the Dutch Warmblood riding horse population. 1. Estimated genetic parameters of scored traits and the genetic relation with dressage and jumping competition from offspring of breeding stallions
| Autor: | H.A Huizinga, J. H. J. van der Werf, S. Korver, G.J.W van der Meij |
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| Rok vydání: | 1991 |
| Předmět: |
Veterinary medicine
Population jumping Animal Breeding and Genomics Biology medicine.disease_cause Genetic correlation Jumping Statistics genetic parameters medicine Fokkerij en Genomica education Selection (genetic algorithm) dressage education.field_of_study General Veterinary stallion Sire Heritability Breed horse Warmblood Animal Science and Zoology performance |
| Zdroj: | Livestock Production Science, 27, 231-244 Livestock Production Science 27 (1991) |
| ISSN: | 0301-6226 |
| DOI: | 10.1016/0301-6226(91)90099-c |
| Popis: | The stationary performance testing (SPT) of stallions as breeding candidates in the Dutch Warmblood riding horse population is evaluated. Genetic and phenotypic parameters of traits scored during SPT and the genetic correlation of these traits with performances in dressage and jumping competition from offspring of breeding stallions are estimated. Data from 1978–1988 are used, covering scores from 337 3-year-old stallions. Eight subjectively scored traits are considered. These traits are: walk; trot; canter; riding ability; show jumping; free jumping; cross country; character. SPT lasts for a period of 100 days. Data from SPT are analysed using an animal model. The relations between SPT of stallions and performances in jumping and dressage competition are analysed with an animal model for SPT data and a sire model for competition data. Variance and covariance components are estimated by restricted maximum likelihood (REML) procedures. Estimates of heritability are high (0.64) for gaits and riding ability, intermediate (0.41) for cross country and medium-high (0.31) for jumping. Estimated genetic correlation between show jumping scored during SPT and jumping in competition from offspring of breeding stallions is 0.84; for dressage this relation is 0.83. Some possible bias due to selection and the subjectivity of scoring is discussed. It is indicated that selection on SPT of stallions before entering breeding service is an effective tool to breed for ability of performance in competition. |
| Databáze: | OpenAIRE |
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