Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep
Red Maasai and Dorper sheep were evaluated for their resistance to gastro-intestinal (GI) nematode parasites (predominantly Haemonchus contortus), productivity and productive efficiency (assessed on a metabolizable energy basis) in experiments undertaken at the Kenyan coast (sub-humid environment) a...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2004
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/28306 |
| _version_ | 1855531552645054464 |
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| author | Baker, R.L. Mugambi, J.M.M. Audho, James O. Carles, A.B. Thorpe, W.R. |
| author_browse | Audho, James O. Baker, R.L. Carles, A.B. Mugambi, J.M.M. Thorpe, W.R. |
| author_facet | Baker, R.L. Mugambi, J.M.M. Audho, James O. Carles, A.B. Thorpe, W.R. |
| author_sort | Baker, R.L. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Red Maasai and Dorper sheep were evaluated for their resistance to gastro-intestinal (GI) nematode parasites (predominantly Haemonchus contortus), productivity and productive efficiency (assessed on a metabolizable energy basis) in experiments undertaken at the Kenyan coast (sub-humid environment) and the Kenyan highlands (semi-arid environment). In both ewes and lambs there were few significant genotype by environment (G X E) interactions for either resistance (assessed by faecal egg count-FEC) or resilience (assessed by blood packed red cell volume-PCV) to GI nematodes. Red Maasai sheep were few significant G X E interactions were due to very poor performance of the Dorper compared to the Red Maasai in the sub-humid coastal environment and to the much improved performance of the Dorper in the semi-arid environment. When these component traits were combined into estimates of flock productivity and productive efficiency there were highly significant G X E interactions with the Red Maasai sheep being considerably more efficient than Dorper sheep in the sub-humid environment, while in the semi-arid environment there was a negligible breed difference in productive efficiency. The results are discussed in terms of breeding strategies for smallholder farmers and pastoralists managing sheep in low-input systems in sub-humid and semi-arid environments. |
| format | Journal Article |
| id | CGSpace28306 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2004 |
| publishDateRange | 2004 |
| publishDateSort | 2004 |
| record_format | dspace |
| spelling | CGSpace283062022-01-29T16:15:04Z Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep Baker, R.L. Mugambi, J.M.M. Audho, James O. Carles, A.B. Thorpe, W.R. sheep (caprinae) genotypes environment productivity digestive system diseases nematoda genetic resistance haemonchus contortus Red Maasai and Dorper sheep were evaluated for their resistance to gastro-intestinal (GI) nematode parasites (predominantly Haemonchus contortus), productivity and productive efficiency (assessed on a metabolizable energy basis) in experiments undertaken at the Kenyan coast (sub-humid environment) and the Kenyan highlands (semi-arid environment). In both ewes and lambs there were few significant genotype by environment (G X E) interactions for either resistance (assessed by faecal egg count-FEC) or resilience (assessed by blood packed red cell volume-PCV) to GI nematodes. Red Maasai sheep were few significant G X E interactions were due to very poor performance of the Dorper compared to the Red Maasai in the sub-humid coastal environment and to the much improved performance of the Dorper in the semi-arid environment. When these component traits were combined into estimates of flock productivity and productive efficiency there were highly significant G X E interactions with the Red Maasai sheep being considerably more efficient than Dorper sheep in the sub-humid environment, while in the semi-arid environment there was a negligible breed difference in productive efficiency. The results are discussed in terms of breeding strategies for smallholder farmers and pastoralists managing sheep in low-input systems in sub-humid and semi-arid environments. 2004 2013-05-06T07:00:21Z 2013-05-06T07:00:21Z Journal Article https://hdl.handle.net/10568/28306 en Limited Access Animal Science;79(pt. 3): 343-353 |
| spellingShingle | sheep (caprinae) genotypes environment productivity digestive system diseases nematoda genetic resistance haemonchus contortus Baker, R.L. Mugambi, J.M.M. Audho, James O. Carles, A.B. Thorpe, W.R. Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep |
| title | Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep |
| title_full | Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep |
| title_fullStr | Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep |
| title_full_unstemmed | Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep |
| title_short | Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep |
| title_sort | genotype by environment interactions for productivity and resistance to gastro intestinal nematode parasites in red maasai and dorper sheep |
| topic | sheep (caprinae) genotypes environment productivity digestive system diseases nematoda genetic resistance haemonchus contortus |
| url | https://hdl.handle.net/10568/28306 |
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