Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls
ABSTRACT: The aim of this study was to estimate genetic and environmental parameters, across bull's age, for semen quality traits including pre- and postcryopreservation semen concentration, sperm motility, and sperm viability as well as ejaculate volume and number of doses per ejaculate. A dat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Journal of Dairy Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022030223000383 |
| _version_ | 1827975317072904192 |
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| author | Y. Salimiyekta J. Jensen G. Su G. Gebreyesus |
| author_facet | Y. Salimiyekta J. Jensen G. Su G. Gebreyesus |
| author_sort | Y. Salimiyekta |
| collection | DOAJ |
| description | ABSTRACT: The aim of this study was to estimate genetic and environmental parameters, across bull's age, for semen quality traits including pre- and postcryopreservation semen concentration, sperm motility, and sperm viability as well as ejaculate volume and number of doses per ejaculate. A data set on 96,595 ejaculates from 2,831 Nordic Holstein bulls collected between 2006 and 2019 was used. Genetic and environmental parameters were estimated using a random regression model and applying the average-information REML approach. Spline functions were chosen to fit the additive genetic and permanent environmental effects across bull's age, and the optimal number of knots was chosen using cross validation. Residual variance heterogeneity was assumed in different bull age classes. The estimated repeatabilities of semen quality traits ranged from 0.16 to 0.85 across different ages of bulls. The estimated heritabilities of semen quality traits ranged from 0.02 to 0.56 across different ages of bulls. The results indicate possibilities for genetic improvement of semen quality traits through selective breeding. |
| first_indexed | 2024-04-09T20:09:40Z |
| format | Article |
| id | doaj.art-4883a78500854789a9251f9b0b02a113 |
| institution | Directory Open Access Journal |
| issn | 0022-0302 |
| language | English |
| last_indexed | 2024-04-09T20:09:40Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dairy Science |
| spelling | doaj.art-4883a78500854789a9251f9b0b02a1132023-04-01T08:40:48ZengElsevierJournal of Dairy Science0022-03022023-04-01106425982612Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bullsY. Salimiyekta0J. Jensen1G. Su2G. Gebreyesus3Center for Quantitative Genetics and Genomics, Aarhus University, C.F Møllers Alle 3, 8000 Aarhus C, Denmark; Danish Genetics, Lysholt Alle 10, 7100 Vejle, Denmark; Corresponding authorCenter for Quantitative Genetics and Genomics, Aarhus University, C.F Møllers Alle 3, 8000 Aarhus C, DenmarkCenter for Quantitative Genetics and Genomics, Aarhus University, C.F Møllers Alle 3, 8000 Aarhus C, DenmarkCenter for Quantitative Genetics and Genomics, Aarhus University, C.F Møllers Alle 3, 8000 Aarhus C, DenmarkABSTRACT: The aim of this study was to estimate genetic and environmental parameters, across bull's age, for semen quality traits including pre- and postcryopreservation semen concentration, sperm motility, and sperm viability as well as ejaculate volume and number of doses per ejaculate. A data set on 96,595 ejaculates from 2,831 Nordic Holstein bulls collected between 2006 and 2019 was used. Genetic and environmental parameters were estimated using a random regression model and applying the average-information REML approach. Spline functions were chosen to fit the additive genetic and permanent environmental effects across bull's age, and the optimal number of knots was chosen using cross validation. Residual variance heterogeneity was assumed in different bull age classes. The estimated repeatabilities of semen quality traits ranged from 0.16 to 0.85 across different ages of bulls. The estimated heritabilities of semen quality traits ranged from 0.02 to 0.56 across different ages of bulls. The results indicate possibilities for genetic improvement of semen quality traits through selective breeding.http://www.sciencedirect.com/science/article/pii/S0022030223000383heritabilityrandom regression modelAI performancespline function |
| spellingShingle | Y. Salimiyekta J. Jensen G. Su G. Gebreyesus Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls Journal of Dairy Science heritability random regression model AI performance spline function |
| title | Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls |
| title_full | Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls |
| title_fullStr | Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls |
| title_full_unstemmed | Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls |
| title_short | Age-dependent genetic and environmental variance of semen quality in Nordic Holstein bulls |
| title_sort | age dependent genetic and environmental variance of semen quality in nordic holstein bulls |
| topic | heritability random regression model AI performance spline function |
| url | http://www.sciencedirect.com/science/article/pii/S0022030223000383 |
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