Factors affecting birth weights of the Boran cattle in Tanzania
Birth weights of 1,030 Boran calves born between 1961 and 1979 at Malya Livestock Research Center in Tanzania were analysed to obtain means and study factors affecting this trait over the years under study and to estimate correction factors for effect of season and sex of calf. Also determined were...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
1987
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/66826 |
| _version_ | 1855518150930464768 |
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| author | Mpiri, D.B. Mpiri, M.T Robison, O.W. |
| author_browse | Mpiri, D.B. Mpiri, M.T Robison, O.W. |
| author_facet | Mpiri, D.B. Mpiri, M.T Robison, O.W. |
| author_sort | Mpiri, D.B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Birth weights of 1,030 Boran calves born between 1961 and 1979 at Malya Livestock Research Center in Tanzania were analysed to obtain means and study factors affecting this trait over the years under study and to estimate correction factors for effect of season and sex of calf. Also determined were heritability estimates from sire and dam components of variance. Last squares mean birth weights for Period I (1963-1969) and Period II (1970-1979) were 26.0± .5 and 25.4±7 respectively. Heritability estimates used on paternal half sibs were 0.33±0.12 and 0.18± 0.13, for periods I and II respectively. Year, season, sire, dam and sex effects were highly significant (P |
| format | Journal Article |
| id | CGSpace66826 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1987 |
| publishDateRange | 1987 |
| publishDateSort | 1987 |
| record_format | dspace |
| spelling | CGSpace668262023-02-15T13:11:32Z Factors affecting birth weights of the Boran cattle in Tanzania Mpiri, D.B. Mpiri, M.T Robison, O.W. cattle calves seasons sex birth weight dams Birth weights of 1,030 Boran calves born between 1961 and 1979 at Malya Livestock Research Center in Tanzania were analysed to obtain means and study factors affecting this trait over the years under study and to estimate correction factors for effect of season and sex of calf. Also determined were heritability estimates from sire and dam components of variance. Last squares mean birth weights for Period I (1963-1969) and Period II (1970-1979) were 26.0± .5 and 25.4±7 respectively. Heritability estimates used on paternal half sibs were 0.33±0.12 and 0.18± 0.13, for periods I and II respectively. Year, season, sire, dam and sex effects were highly significant (P 1987 2015-06-05T12:17:53Z 2015-06-05T12:17:53Z Journal Article https://hdl.handle.net/10568/66826 en Open Access Mpiri, D.B., Mpiri, M.T and Robison, O.W. 1987. Factors affecting birth weights of the Boran cattle in Tanzania. Bulletin of Animal Health and Production in Africa 35(2): 154-159. |
| spellingShingle | cattle calves seasons sex birth weight dams Mpiri, D.B. Mpiri, M.T Robison, O.W. Factors affecting birth weights of the Boran cattle in Tanzania |
| title | Factors affecting birth weights of the Boran cattle in Tanzania |
| title_full | Factors affecting birth weights of the Boran cattle in Tanzania |
| title_fullStr | Factors affecting birth weights of the Boran cattle in Tanzania |
| title_full_unstemmed | Factors affecting birth weights of the Boran cattle in Tanzania |
| title_short | Factors affecting birth weights of the Boran cattle in Tanzania |
| title_sort | factors affecting birth weights of the boran cattle in tanzania |
| topic | cattle calves seasons sex birth weight dams |
| url | https://hdl.handle.net/10568/66826 |
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