Genetic parameters of growth of Ethiopian Boran cattle
Records on birth weight and pre-weaning growth of 3959 Boran calves, which were progeny of 51 sires and 979 dams, were analysed by least-squares analysis of variance. The vaiance components for sires, dams and maternal grandsires were estimated from the data. On the basis of assumed genetic correlat...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Cambridge University Press
1987
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/66838 |
| _version_ | 1855513672235876352 |
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| author | Arnason, T. Kassa-Mersha, H. |
| author_browse | Arnason, T. Kassa-Mersha, H. |
| author_facet | Arnason, T. Kassa-Mersha, H. |
| author_sort | Arnason, T. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Records on birth weight and pre-weaning growth of 3959 Boran calves, which were progeny of 51 sires and 979 dams, were analysed by least-squares analysis of variance. The vaiance components for sires, dams and maternal grandsires were estimated from the data. On the basis of assumed genetic correlations -0.44 and -0.55 between direct and maternal effects on birth weight and weaning weight, respectively, the maternal genetic component and the genetic covariance between direct and maternal effects were estimated. The heritabilities for direct effects on birth weight and weaning weight were 0.11 and 0.22, respectively, while the heritabilities of maternal effects were estimated as 0.02 and 0.11, respectively for the same traits. Selection indices for direct and maternal genetic components of weaning weight were constructed for practical use. These selection indices combined information on the individual, the parents and sibs. |
| format | Journal Article |
| id | CGSpace66838 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1987 |
| publishDateRange | 1987 |
| publishDateSort | 1987 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace668382024-11-15T08:52:01Z Genetic parameters of growth of Ethiopian Boran cattle Arnason, T. Kassa-Mersha, H. cattle animal breeding genetics growth birth weight weaning weight heritability Records on birth weight and pre-weaning growth of 3959 Boran calves, which were progeny of 51 sires and 979 dams, were analysed by least-squares analysis of variance. The vaiance components for sires, dams and maternal grandsires were estimated from the data. On the basis of assumed genetic correlations -0.44 and -0.55 between direct and maternal effects on birth weight and weaning weight, respectively, the maternal genetic component and the genetic covariance between direct and maternal effects were estimated. The heritabilities for direct effects on birth weight and weaning weight were 0.11 and 0.22, respectively, while the heritabilities of maternal effects were estimated as 0.02 and 0.11, respectively for the same traits. Selection indices for direct and maternal genetic components of weaning weight were constructed for practical use. These selection indices combined information on the individual, the parents and sibs. 1987-04 2015-06-05T12:17:57Z 2015-06-05T12:17:57Z Journal Article https://hdl.handle.net/10568/66838 en Limited Access Cambridge University Press Arnason, T. and Kassa-Mersha, H. 1987. Genetic parameters of growth of Ethiopian Boran cattle. Animal Production 44(2): 201-208. |
| spellingShingle | cattle animal breeding genetics growth birth weight weaning weight heritability Arnason, T. Kassa-Mersha, H. Genetic parameters of growth of Ethiopian Boran cattle |
| title | Genetic parameters of growth of Ethiopian Boran cattle |
| title_full | Genetic parameters of growth of Ethiopian Boran cattle |
| title_fullStr | Genetic parameters of growth of Ethiopian Boran cattle |
| title_full_unstemmed | Genetic parameters of growth of Ethiopian Boran cattle |
| title_short | Genetic parameters of growth of Ethiopian Boran cattle |
| title_sort | genetic parameters of growth of ethiopian boran cattle |
| topic | cattle animal breeding genetics growth birth weight weaning weight heritability |
| url | https://hdl.handle.net/10568/66838 |
| work_keys_str_mv | AT arnasont geneticparametersofgrowthofethiopianborancattle AT kassamershah geneticparametersofgrowthofethiopianborancattle |