Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep
| dc.creator | Baker, R.L. | |
| dc.creator | Mugambi, J.M.M. | |
| dc.creator | Audho, James O. | |
| dc.creator | Carles, A.B. | |
| dc.creator | Thorpe, W.R. | |
| dc.date | 2004 | |
| dc.date | 2013-05-06T07:00:21Z | |
| dc.date | 2013-05-06T07:00:21Z | |
| dc.date.accessioned | 2026-06-27T17:00:31Z | |
| dc.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. | |
| dc.identifier | https://hdl.handle.net/10568/28306 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/139522 | |
| dc.language | en | |
| dc.rights | Limited Access | |
| dc.source | Animal Science;79(pt. 3): 343-353 | |
| dc.subject | sheep (caprinae) | |
| dc.subject | genotypes | |
| dc.subject | environment | |
| dc.subject | productivity | |
| dc.subject | digestive system diseases | |
| dc.subject | nematoda | |
| dc.subject | genetic resistance | |
| dc.subject | haemonchus contortus | |
| dc.title | Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep | |
| dc.type | Journal Article |