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Estimation of genetic parameters for temperament in Jeju crossbred horses.
Abstract: 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. Conclusions: 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.
Publication Date: 2018-04-11 PubMed ID: 29642687PubMed Central: PMC6043454DOI: 10.5713/ajas.17.0252Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
Summary
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This research paper investigates the genetic influences on the temperament of Jeju crossbred horses, discovering moderate heritability and a high correlation between different temperament aspects.
Research Objective
The study seeks to assess the genetic traits that determine temperament in Jeju crossbred horses (a breed-cross of Jeju and Thoroughbred horses). The researchers used records from temperament tests with the objective of applying the findings to enhance the temperament of these horses in the future.
Methods
- The researchers used 205 Jeju crossbred horses (101 females, 104 males) born between 2010 and 2015 for the study.
- The horses were trained and tamed according to the Manual for Horse Taming and Evaluation for Therapeutic Riding Horses.
- The horses’ temperaments were evaluated between 15 and 18 months of age, in categories including gentleness, patience, aggressiveness, sensitivity, and friendliness.
- Scoring for each category was done on a five-point linear scale.
- To analyze the genetic parameters for these test categories, the researchers used a multi-trait mixed model with repeated records.
- Data was processed through the ASReml software program.
Results
- The heritability (the proportion of observed differences on a phenotypic trait among individuals of a population that are due to genetic differences) 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.
- There was a high genetic correlation (measure of the amount of statistical association between the genetic liabilities for two traits or conditions) among the temperament categories, ranging from 0.96 to 0.99.
- Similarly, the study found high repeatability (degree of consistency of a measure) in the temperament categories, ranging from 0.70 to 0.73.
Conclusion
Primarily, the research found that the temperament test categories possess moderate heritability and high genetic correlations among one another. However, it also indicates that further studies may be required for the practical use of these findings in programs aimed at improving the temperament of Jeju crossbred horses.
Cite This Article
APA
Kim NY, Son JK, Cho IC, Shin SM, Park SH, Seong PN, Woo JH, Park NG, Park HB.
(2018).
Estimation of genetic parameters for temperament in Jeju crossbred horses.
Asian-Australas J Anim Sci, 31(8), 1098-1102.
https://doi.org/10.5713/ajas.17.0252 Publication
Researcher Affiliations
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
- Subtropical Livestock Research Institute, National Institute of Animal Science, RDA, Jeju 63242, Korea.
Conflict of Interest Statement
. We certify that there is no conflict of interest with any financial organization regarding the material discussed in the manuscript.
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This article includes 12 references
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Citations
This article has been cited 4 times.- Hausberger M, Lesimple C, Henry S. Detecting Welfare in a Non-Verbal Species: Social/Cultural Biases and Difficulties in Horse Welfare Assessment. Animals (Basel) 2021 Jul 30;11(8).
- Lee KE, Kim JG, Lee H, Kim BS. Behavioral and cardiac responses in mature horses exposed to a novel object. J Anim Sci Technol 2021 May;63(3):651-661.
- Srikanth K, Kim NY, Park W, Kim JM, Kim KD, Lee KT, Son JH, Chai HH, Choi JW, Jang GW, Kim H, Ryu YC, Nam JW, Park JE, Kim JM, Lim D. Comprehensive genome and transcriptome analyses reveal genetic relationship, selection signature, and transcriptome landscape of small-sized Korean native Jeju horse. Sci Rep 2019 Nov 13;9(1):16672.
- Encina A, Ligero M, Sánchez-Guerrero MJ, Rodríguez-Sainz de Los Terreros A, Bartolomé E, Valera M. Phenotypic and Genetic Study of the Presence of Hair Whorls in Pura Raza Español Horses. Animals (Basel) 2023 Sep 16;13(18).
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