A study was carried out from 1992 to 1996 to compare the resistance to naturally acquired gastro intestinal (GI) nematode parasite infections (predominantly Haemonchus contortus) of Galla and Small East African goats in the sub humid coastal region of Kenya. A total of 204 Galla and 349 Small Eas...
Baker, R.L.
,
Audho, James O.
,
Aduda, Eric O.
,
Thorpe, W.R.
,
[Genetic resistance to gastro-intestinal nematode parasites in Galla and Small East African goats in the sub-humid tropics]
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Genetic resistance to gastro-intestinal nematode parasites in Galla and Small East African goats in the sub-humid tropics
Divergent breeding lines of Romney sheep, selected as lambs for consistently high or low faecal worm egg count (FEC) following natural multi-species challenge by nematode parasites, were established in New Zealand at Wallaceville Animal Research Centre in 1979 and at Rotomahana Station in 1985. I...
Morris, C.A.
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Vlassoff, A.
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Bisset, S.A.
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Baker, R.L.
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Watson, H.T.G.
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West, C.J.
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Wheeler, M.
,
[Continued selection of Romney sheep for resistance or susceptibility to nematode infection: Estimates of direct and correlated responses]
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Continued selection of Romney sheep for resistance or susceptibility to nematode infection: Estimates of direct and correlated responses
Baker, R.L.
,
[Genetic resistance to endoparasites in sheep and goats: A review of genetic resistance to gastrointestinal nematode parasites in sheep and goats in the tropics and evidence for resistance in some sheep and goat breeds in sub-humid coastal Kenya]
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Genetic resistance to endoparasites in sheep and goats: A review of genetic resistance to gastrointestinal nematode parasites in sheep and goats in the tropics and evidence for resistance in some sheep and goat breeds in sub-humid coastal Kenya
Data collected on 3256 lambs born to Horro and Menz breed ewes single-sire mated to 71 rams at the International Livestock research Institute (ILRI) Debre Berhan station between September 1992 and June 1996 were analysed for rates of survival and growth from birth to weaning. A significantly lowe...
Mukasa-Mugerwa, E.
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Lahlou-Kassi, A.
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Anindo, D.O.
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Rege, J.E.O.
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Tembely, S.
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Tibbo, Markos
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Baker, R.L.
,
[Between and within breed variation in lamb survival and the risk factors associated with major causes of mortality in indigenous Horro and menz sheep in Ethiopia]
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Between and within breed variation in lamb survival and the risk factors associated with major causes of mortality in indigenous Horro and menz sheep in Ethiopia
Resistance and resilience to naturally acquired gastro-intestinal (GI) nematode parasite infections (predominantly Haemonchus contortus) were studied in 1785 lambs born over six lambings (1991 to 1996) consisting of 212 Red Maasai, 311 Dorper and 1262 crossbred (Red Maasai-Dorper) lambs in the su...
Baker, R.L.
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Nagda, S.M.
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Rodríguez Zas, S.L.
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Southey, B.R.
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Audho, James O.
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Aduda, Eric O.
,
Thorpe, W.R.
,
[Resistance and resilience to gastro-intestinal nematode parasites and relationships with productivity of Red Maasai, Dorper and Red Maasai X Dorper crossbred lambs in the sub-humid tropics]
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Resistance and resilience to gastro-intestinal nematode parasites and relationships with productivity of Red Maasai, Dorper and Red Maasai X Dorper crossbred lambs in the sub-humid tropics
A genome-wide scan was performed to detect quantitative trait loci (QTL) for resistance to the gastrointestinal nematode Haemonchus contortus in a double backcross population of Red Maasai and Dorper sheep. The mapping population comprised six sire families, with 1026 lambs in total. The lambs we...
Marshall, Karen
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Mugambi, J.M.M.
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Nagda, S.M.
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Sonstegard, T.S.
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Tassell, C.P. van
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Baker, R.L.
,
Gibson, John P.
,
[Quantitative trait loci for resistance to Haemonchus contortus artificial challenge in Red Maasai and Dorper sheep of East Africa]
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Quantitative trait loci for resistance to Haemonchus contortus artificial challenge in Red Maasai and Dorper sheep of East Africa
A total of 4355 lamb and 4299 ewe records, obtained from Sabi sheep of Zimbabwe from 1984 to 1994, were analysed to describe growth, carcass and reproductive traits and to investigate non-genetic factors influencing their expression. Year of birth, sex, birth/rearing status of lamb, dam age, age ...
Matika, O.
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Wyk, J.B. van
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Erasmus, G.J.
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Baker, R.L.
,
[A description of growth, carcass and reproductive traits of Sabi sheep in Zimbabwe]
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A description of growth, carcass and reproductive traits of Sabi sheep in Zimbabwe
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 relations...
Toe, F.
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Rege, J.E.O.
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Mukasa-Mugerwa, E.
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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]
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Reproductive characteristics of Ethiopian highland sheep. I. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs