Trajectory of body weight of performance tested dual-purpose bulls
6 508 bulls of dual-purpose cattle at performance-test stations were weighed at intervals of 30 days from birth to 420 days. After all editing a total of 74 558 weight records were available. Live weight was evaluated by orthogonal Legendre Polynomial (LP) of degree 4 and by Linear Spline function (...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2007-10-01
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| Series: | Czech Journal of Animal Science |
| Subjects: | |
| Online Access: | https://cjas.agriculturejournals.cz/artkey/cjs-200710-0001_trajectory-of-body-weight-of-performance-tested-dual-purpose-bulls.php |
| _version_ | 1797899335529136128 |
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| author | J. Přibyl H. Krejčová J. Přibylová I. Misztal J. Bohmanová M. Štípková |
| author_facet | J. Přibyl H. Krejčová J. Přibylová I. Misztal J. Bohmanová M. Štípková |
| author_sort | J. Přibyl |
| collection | DOAJ |
| description | 6 508 bulls of dual-purpose cattle at performance-test stations were weighed at intervals of 30 days from birth to 420 days. After all editing a total of 74 558 weight records were available. Live weight was evaluated by orthogonal Legendre Polynomial (LP) of degree 4 and by Linear Spline function (SP) with 5 knots. The fixed effects of test-day-year-station of weighing (TDS) and LP within station-year explain together 97% of variability. Variance components were estimated by REML (REMLF90 programme) taking into account heterogeneous variance during growth. The basic model included fixed effects: TDS, and fixed regression on age (LPF), and random regression for additive genetic (SPG) and permanent environmental of the animal (SPPE) effects. Variability of all components increases with age. During the 50-400 day period the heritability is 0.28 on average. Heritability increases with the age of the animal; it is the highest at the end of the period. Correlations for body weights between different ages of the animal are high. |
| first_indexed | 2024-04-10T08:27:12Z |
| format | Article |
| id | doaj.art-517033c6e9d449e98319fd8cc3bba725 |
| institution | Directory Open Access Journal |
| issn | 1212-1819 1805-9309 |
| language | English |
| last_indexed | 2024-04-10T08:27:12Z |
| publishDate | 2007-10-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Czech Journal of Animal Science |
| spelling | doaj.art-517033c6e9d449e98319fd8cc3bba7252023-02-23T03:32:29ZengCzech Academy of Agricultural SciencesCzech Journal of Animal Science1212-18191805-93092007-10-01521031532410.17221/2340-CJAScjs-200710-0001Trajectory of body weight of performance tested dual-purpose bullsJ. Přibyl0H. Krejčová1J. Přibylová2I. Misztal3J. Bohmanová4M. Štípková5Institute of Animal Science, Prague-Uhříněves, Czech RepublicInstitute of Animal Science, Prague-Uhříněves, Czech RepublicInstitute of Animal Science, Prague-Uhříněves, Czech RepublicUnivesity Georgia, Athens, USAUniversity Guelph, CanadaInstitute of Animal Science, Prague-Uhříněves, Czech Republic6 508 bulls of dual-purpose cattle at performance-test stations were weighed at intervals of 30 days from birth to 420 days. After all editing a total of 74 558 weight records were available. Live weight was evaluated by orthogonal Legendre Polynomial (LP) of degree 4 and by Linear Spline function (SP) with 5 knots. The fixed effects of test-day-year-station of weighing (TDS) and LP within station-year explain together 97% of variability. Variance components were estimated by REML (REMLF90 programme) taking into account heterogeneous variance during growth. The basic model included fixed effects: TDS, and fixed regression on age (LPF), and random regression for additive genetic (SPG) and permanent environmental of the animal (SPPE) effects. Variability of all components increases with age. During the 50-400 day period the heritability is 0.28 on average. Heritability increases with the age of the animal; it is the highest at the end of the period. Correlations for body weights between different ages of the animal are high.https://cjas.agriculturejournals.cz/artkey/cjs-200710-0001_trajectory-of-body-weight-of-performance-tested-dual-purpose-bulls.phpcattlerandom regressionheritabilitygenetic correlationgrowth curvelinear spline |
| spellingShingle | J. Přibyl H. Krejčová J. Přibylová I. Misztal J. Bohmanová M. Štípková Trajectory of body weight of performance tested dual-purpose bulls Czech Journal of Animal Science cattle random regression heritability genetic correlation growth curve linear spline |
| title | Trajectory of body weight of performance tested dual-purpose bulls |
| title_full | Trajectory of body weight of performance tested dual-purpose bulls |
| title_fullStr | Trajectory of body weight of performance tested dual-purpose bulls |
| title_full_unstemmed | Trajectory of body weight of performance tested dual-purpose bulls |
| title_short | Trajectory of body weight of performance tested dual-purpose bulls |
| title_sort | trajectory of body weight of performance tested dual purpose bulls |
| topic | cattle random regression heritability genetic correlation growth curve linear spline |
| url | https://cjas.agriculturejournals.cz/artkey/cjs-200710-0001_trajectory-of-body-weight-of-performance-tested-dual-purpose-bulls.php |
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