Estimation of genetic parameters for temperament in Jeju crossbred horses
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
Objective: Temperament can be defined as a type of behavioral tendency that appears in a relatively stable manner in responses to various external stimuli over time. The aim of this study was to estimate genetic parameters for the records of temperament testing that are used to improve the temperament of Jeju crossbred (Jeju×Thoroughbred) horses. Methods: This study was conducted using 205 horses (101 females and 104 males) produced between 2010 and 2015. The experimental animals were imprinted and tamed according to the Manual for Horse Taming and Evaluation for Therapeutic Riding Horses and evaluated according to the categories for temperament testing (gentleness, patience, aggressiveness, sensitivity, and friendliness) between 15 months and 18 months of age. Each category was scored on a five-point linear scale. Genetic parameters for the test categories were analyzed using a multi-trait mixed model with repeated records. The ASReml program was used to analyze the data. Results: The heritability of gentleness, patience, aggressiveness, sensitivity and friendliness ranged from 0.08 to 0.53. The standard errors of estimated heritability ranged from 0.13 to 0.17. The test categories showed high genetic correlations with each other, ranging from 0.96 to 0.99 and high repeatability, ranging from 0.70 to 0.73. Conclusion: The results of this study showed that the test categories had moderate heritability and high genetic correlations, but additional studies may be necessary to use the results for the improvement programs of the temperament of Jeju crossbred horses.
Abstract
Objective: Temperament can be defined as a type of behavioral tendency that appears in a relatively stable manner in responses to various external stimuli over time. The aim of this study was to estimate genetic parameters for the records of temperament testing that are used to improve the temperament of Jeju crossbred (Jeju×Thoroughbred) horses. Methods: This study was conducted using 205 horses (101 females and 104 males) produced between 2010 and 2015. The experimental animals were imprinted and tamed according to the Manual for Horse Taming and Evaluation for Therapeutic Riding Horses and evaluated according to the categories for temperament testing (gentleness, patience, aggressiveness, sensitivity, and friendliness) between 15 months and 18 months of age. Each category was scored on a five-point linear scale. Genetic parameters for the test categories were analyzed using a multi-trait mixed model with repeated records. The ASReml program was used to analyze the data. Results: The heritability of gentleness, patience, aggressiveness, sensitivity and friendliness ranged from 0.08 to 0.53. The standard errors of estimated heritability ranged from 0.13 to 0.17. The test categories showed high genetic correlations with each other, ranging from 0.96 to 0.99 and high repeatability, ranging from 0.70 to 0.73. Conclusion: The results of this study showed that the test categories had moderate heritability and high genetic correlations, but additional studies may be necessary to use the results for the improvement programs of the temperament of Jeju crossbred horses.
참고문헌 (12)
- Seaman S, "How reliable is temperament assessment in the domestic horse (Equus caballus)?", Appl Anim Behav Sci, 78, pp.175~191 (2002)[DOI]
- Goldsmith HH, "Roundtable: What is temperament? Four approaches", Child Dev, 58, pp.505~529 (1987)[DOI]
- Buckley P, "Owners' perceptions of the health and performance of Pony Club horses in Australia", Prev Vet Med, 63, pp.121~133 (2004)[DOI]
- Koenen E, "An overview of breeding objectives for warmblood sport horses", Livest Prod Sci, 88, pp.77~84 (2004)[DOI]
- Gauly M, "Estimating genetic variability in temperamental traits in German Angus and Simmental cattle", Appl Anim Behav Sci, 74, pp.109~119 (2001)[DOI]
- Lucena C, "Genetic analysis of the temperament of Nellore cattle using linear and threshold models", Animal, 9, pp.388~394 (2015)[DOI]
- Zambra N, "Temperament and its heritability in Corriedale and Merino lambs", Animal, 9, pp.373~379 (2015)[DOI]
- Oki H, "Estimation of heritability and genetic correlation for behavioural responses by Gibbs sampling in the Thoroughbred racehorse", J Anim Breed Genet, 124, pp.185~191 (2007)[DOI]
- Rothmann J, "A note on the heritability of reactivity assessed at field tests for Danish Warmblood Horses", J Equine Vet Sci, 34, pp.341~343 (2014)[DOI]
- Le Neindre P, "Individual differences in docility in Limousin cattle", J Anim Sci, 73, pp.2249~2253 (1995)[DOI]
- Lee JE, "The Manual for horse taming and evaluation for therapeutic riding horses" (2010)
- 김남영, "Questionnaire Survey를 이용한 말의 품성 평가", 한국동물생명공학회지, 28(3), pp.223~227 (2013), 사단법인 한국동물생명공학회