Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses
The temperament trait Spirit is included in the official breeding goal for Icelandic horses. Spirit is subjectively assessed at breeding field tests, and is included in the genetic evaluation for Icelandic horses. The assessment method for spirit has been discussed within the Icelandic horse society...
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ftsluppsalast:oai:stud.epsilon.slu.se:9452 2023-05-15T16:52:09+02:00 Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses Sigurðardóttir, Heiðrún 2016-07-21 application/pdf https://stud.epsilon.slu.se/9452/1/sigurdardottir_h_160907.pdf en eng eng https://stud.epsilon.slu.se/9452/ urn:nbn:se:slu:epsilon-s-5792 https://stud.epsilon.slu.se/9452/1/sigurdardottir_h_160907.pdf Sigurðardóttir, Heiðrún, 2016. Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses. Second cycle, A2E. Uppsala: (VH) > Dept. of Animal Breeding and Genetics <https://stud.epsilon.slu.se/view/divisions/OID-670.html> Animal genetics and breeding Second cycle, A2E NonPeerReviewed 2016 ftsluppsalast 2022-09-10T18:10:46Z The temperament trait Spirit is included in the official breeding goal for Icelandic horses. Spirit is subjectively assessed at breeding field tests, and is included in the genetic evaluation for Icelandic horses. The assessment method for spirit has been discussed within the Icelandic horse society for several years where some consider it to favour nervous and tense horses instead of cooperative and stable horses. In 2014, the Horse Breeders Association in Iceland initiated a project for a trial period with additional assessments pertaining to temperamental suppleness by breeding judges at breeding field tests, as means to improve the assessment of spirit. The aim of this thesis was to evaluate the current assessment method for spirit. Genetic parameters were estimated for all temperament traits assessed at breeding field tests as well as general temperament traits assessed at home by owners. The consistency between assessments made by breeding judges and riders at breeding field tests was investigated, as well as the consistency between assessments made by owners at home and assessments made by breeding judges at breeding field tests. The frequency of culling due to temperament faults was also investigated by gathering information from owners of culled horses. The estimated heritabilities of the temperament traits assessed at breeding field tests ranged from 0.00 to 0.76, and differed depending on whether riders or judges assessed the trait. It seemed that the riders were better suited to assess some traits. It was concluded that the new suppleness traits assessed at breeding field tests provide additional information supporting the assessment of spirit but trait definitions need to be improved. Estimated heritabilities for general temperament traits ranged from 0.00 to 0.56. The highest heritability was estimated for training level which describes the genetic potential of the horse to respond to training. Genetic correlations between the general temperament traits and spirit were estimated on a wide range ... Text Iceland Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects |
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Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects |
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English |
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Animal genetics and breeding |
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Animal genetics and breeding Sigurðardóttir, Heiðrún Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses |
topic_facet |
Animal genetics and breeding |
description |
The temperament trait Spirit is included in the official breeding goal for Icelandic horses. Spirit is subjectively assessed at breeding field tests, and is included in the genetic evaluation for Icelandic horses. The assessment method for spirit has been discussed within the Icelandic horse society for several years where some consider it to favour nervous and tense horses instead of cooperative and stable horses. In 2014, the Horse Breeders Association in Iceland initiated a project for a trial period with additional assessments pertaining to temperamental suppleness by breeding judges at breeding field tests, as means to improve the assessment of spirit. The aim of this thesis was to evaluate the current assessment method for spirit. Genetic parameters were estimated for all temperament traits assessed at breeding field tests as well as general temperament traits assessed at home by owners. The consistency between assessments made by breeding judges and riders at breeding field tests was investigated, as well as the consistency between assessments made by owners at home and assessments made by breeding judges at breeding field tests. The frequency of culling due to temperament faults was also investigated by gathering information from owners of culled horses. The estimated heritabilities of the temperament traits assessed at breeding field tests ranged from 0.00 to 0.76, and differed depending on whether riders or judges assessed the trait. It seemed that the riders were better suited to assess some traits. It was concluded that the new suppleness traits assessed at breeding field tests provide additional information supporting the assessment of spirit but trait definitions need to be improved. Estimated heritabilities for general temperament traits ranged from 0.00 to 0.56. The highest heritability was estimated for training level which describes the genetic potential of the horse to respond to training. Genetic correlations between the general temperament traits and spirit were estimated on a wide range ... |
format |
Text |
author |
Sigurðardóttir, Heiðrún |
author_facet |
Sigurðardóttir, Heiðrún |
author_sort |
Sigurðardóttir, Heiðrún |
title |
Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses |
title_short |
Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses |
title_full |
Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses |
title_fullStr |
Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses |
title_full_unstemmed |
Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses |
title_sort |
evaluation of assessment method for the trait spirit in breeding field tests for icelandic horses |
publishDate |
2016 |
url |
https://stud.epsilon.slu.se/9452/1/sigurdardottir_h_160907.pdf |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://stud.epsilon.slu.se/9452/ urn:nbn:se:slu:epsilon-s-5792 https://stud.epsilon.slu.se/9452/1/sigurdardottir_h_160907.pdf Sigurðardóttir, Heiðrún, 2016. Evaluation of assessment method for the trait Spirit in breeding field tests for Icelandic horses. Second cycle, A2E. Uppsala: (VH) > Dept. of Animal Breeding and Genetics <https://stud.epsilon.slu.se/view/divisions/OID-670.html> |
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1766042311216594944 |