Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Estimation of genetic parameters for temperament in Jeju crossbred horses

  • Kim, Nam Young (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Son, Jun Kyu (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Cho, In Cheol (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Shin, Sang Min (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Park, Seol Hwa (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Seong, Pil Nam (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Woo, Jae Hoon (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Park, Nam Geon (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Park, Hee Bok (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA)
  • Received : 2017.04.05
  • Accepted : 2018.03.13
  • Published : 2018.08.01
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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${\times}$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.

Keywords

References

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