Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs
A study was conducted to estimate heritabilities of, and genetic correlations among, body weight (WT) and testicular measurements - scrotal circumference (SC), testicular diameter (TD), testicular length (TL) and epididymal diameter (ED - in ram lambs between 6, 9 and 12 months old, and relationship...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2000
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/66851 |
| _version_ | 1855524934821871616 |
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| author | Toe, F. Rege, J.E.O. Mukasa-Mugerwa, E. Tembely, S. Anindo, D.O. Baker, R.L. Lahlou-Kassi, A. |
| author_browse | Anindo, D.O. Baker, R.L. Lahlou-Kassi, A. Mukasa-Mugerwa, E. Rege, J.E.O. Tembely, S. Toe, F. |
| author_facet | Toe, F. Rege, J.E.O. Mukasa-Mugerwa, E. Tembely, S. Anindo, D.O. Baker, R.L. Lahlou-Kassi, A. |
| author_sort | Toe, F. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A study was conducted to estimate heritabilities of, and genetic correlations among, body weight (WT) and testicular measurements - scrotal circumference (SC), testicular diameter (TD), testicular length (TL) and epididymal diameter (ED - in ram lambs between 6, 9 and 12 months old, and relationship of the testicular traits with age at puberty in ewe lambs (AP). Two fat-tailed sheep breeds, the Horro and Menz, indigenous to the Ethiopian highlands were studied. Experimental lambs were produced by mating 250 oestrus-synchronized ewes of each breed to 10 sires in a single-sire mating system over three mating periods which produced, for this study, a total of 361 ram lambs and 148 ewe lambs, with substantial pedigree information, in two dry seasons (October/November 1992 and 1993) and one wet season (June/July 1993). Mean AP was 322.7 days. Breed was not significant (P>0.05) for all testicular measurements, except ED at 9 months for which the Horro had a higher (P |
| format | Journal Article |
| id | CGSpace66851 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2000 |
| publishDateRange | 2000 |
| publishDateSort | 2000 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace668512024-08-27T10:35:55Z Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs Toe, F. Rege, J.E.O. Mukasa-Mugerwa, E. Tembely, S. Anindo, D.O. Baker, R.L. Lahlou-Kassi, A. sheep genetics age rams sexual maturity testes copulation genetic parameters reproductive performance A study was conducted to estimate heritabilities of, and genetic correlations among, body weight (WT) and testicular measurements - scrotal circumference (SC), testicular diameter (TD), testicular length (TL) and epididymal diameter (ED - in ram lambs between 6, 9 and 12 months old, and relationship of the testicular traits with age at puberty in ewe lambs (AP). Two fat-tailed sheep breeds, the Horro and Menz, indigenous to the Ethiopian highlands were studied. Experimental lambs were produced by mating 250 oestrus-synchronized ewes of each breed to 10 sires in a single-sire mating system over three mating periods which produced, for this study, a total of 361 ram lambs and 148 ewe lambs, with substantial pedigree information, in two dry seasons (October/November 1992 and 1993) and one wet season (June/July 1993). Mean AP was 322.7 days. Breed was not significant (P>0.05) for all testicular measurements, except ED at 9 months for which the Horro had a higher (P 2000-06 2015-06-05T12:18:01Z 2015-06-05T12:18:01Z Journal Article https://hdl.handle.net/10568/66851 en Limited Access Elsevier Toe, F, Rege, J.E.O., Mukasa-Mugerwa, E., Tembely, S, Anindo, D., Baker R.L. and Lahlou-Kassi, A. 2000. Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs. Small Ruminant Research 36(3): 227-240. |
| spellingShingle | sheep genetics age rams sexual maturity testes copulation genetic parameters reproductive performance Toe, F. Rege, J.E.O. Mukasa-Mugerwa, E. Tembely, S. Anindo, D.O. Baker, R.L. Lahlou-Kassi, A. Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| title | Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| title_full | Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| title_fullStr | Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| title_full_unstemmed | Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| title_short | Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| title_sort | reproductive characteristics of ethiopian highland sheep i genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs |
| topic | sheep genetics age rams sexual maturity testes copulation genetic parameters reproductive performance |
| url | https://hdl.handle.net/10568/66851 |
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