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Journal Article 2001

Autor: Neser, F.W.C. Erasmus, G.J. Wyk, J.B. van

Genetic parameters were estimated for birth-, 42-day, and 100-day (weaning) weight in the Dorper flock of the Glen Agricultural Institute in South Africa. Direct habitability estimates of 0.11, 0.28 and 0.20 and maternal habitability estimates of 0.10, 0.10 and 0.10 were obtained for body weight ...

Enlace original: https://cgspace.cgiar.org/handle/10568/66842

Investigación en Agricultura
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Neser, F.W.C. ,  Erasmus, G.J. ,  Wyk, J.B. van ,  [Genetic parameter estimates for pre-weaning weight traits in Dorper sheep] ,  Genetic parameter estimates for pre-weaning weight traits in Dorper sheep
Journal Article 1993

Autor: Wyk, J.B. van Erasmus, G.J. Konstantinov, K.V.

Total of 8909 birth weight and 7740 weaning weight records, from the progeny of 215 sires, collected from 1943 to 1990 from the Elsenburg Dormer sheep stud, were analysed. Additive genetic variance and heritability estimates for birth weight (BW), weaning weight (WW), average daily gain (ADG) and...

Enlace original: https://cgspace.cgiar.org/handle/10568/66832

Investigación en Agricultura
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Wyk, J.B. van ,  Erasmus, G.J. ,  Konstantinov, K.V. ,  [Variance component and heritability estimates of early growth traits in the Elsenburg Dormer sheep stud] ,  Variance component and heritability estimates of early growth traits in the Elsenburg Dormer sheep stud
Journal Article 2003

Autor: Matika, O. Nyoni, S. Wyk, J.B. van Erasmus, G.J. Baker, R.L.

Sabi and Dorper ewes were evaluated for resistance to gastro-intestinal nematode parasites (predominantly Haemonchus contortus) at the Matopos Research Station in Zimbabwe. Live weights (LWT), blood packed red cell volume (PCV) and faecal egg counts (FEC) were recorded at mating, 1 month before...

Enlace original: https://cgspace.cgiar.org/handle/10568/29610

Investigación en Agricultura
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Matika, O. ,  Nyoni, S. ,  Wyk, J.B. van ,  Erasmus, G.J. ,  Baker, R.L. ,  [Resistance of Sabi and Dorper ewes to gastro-intestinal nematode infections in an African semi-arid environment] ,  Resistance of Sabi and Dorper ewes to gastro-intestinal nematode infections in an African semi-arid environment
Journal Article 1993

Autor: Wyk, J.B. van Erasmus, G.J. Konstantinov, K.V.

Records of the Esenburg stud where the Dormer sheep breed originated in 1941, were anaysed from 1941 to 1990 to investigate non-genetic factors contributing to early growth traits. The fixed effects, identified as having a significant (P< 0.01) effect on birth weight, weaning weight, average dail...

Enlace original: https://cgspace.cgiar.org/handle/10568/66821

Investigación en Agricultura
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Wyk, J.B. van ,  Erasmus, G.J. ,  Konstantinov, K.V. ,  [Non-genetic factors influencing early growth traits in the Elsenburg Dormer sheep stud] ,  Non-genetic factors influencing early growth traits in the Elsenburg Dormer sheep stud
Journal Article 1998

Autor: Snyman, M.A. Erasmus, G.J. Wyk, J.B. van Olivier, J.J.
Enlace original: https://cgspace.cgiar.org/handle/10568/66764

Investigación en Agricultura
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Snyman, M.A. ,  Erasmus, G.J. ,  Wyk, J.B. van ,  Olivier, J.J. ,  [Genetic and phenotypic correlations among production and reproduction traits in Afrino sheep] ,  Genetic and phenotypic correlations among production and reproduction traits in Afrino sheep
Journal Article 2003

Autor: Matika, O. Wyk, J.B. van Erasmus, G.J. Baker, R.L.

Genetic parameters for growth traits in Sabi sheep were estimated using from data records of 4123 lambs from 130 sires and 1131 dams collected between 1984 and 1994. Reproduction traits and lamb survival to weaning were analysed fitting a sire threshold model. The direct additive contribution t...

Enlace original: https://cgspace.cgiar.org/handle/10568/29173

Investigación en Agricultura
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Matika, O. ,  Wyk, J.B. van ,  Erasmus, G.J. ,  Baker, R.L. ,  [Genetic parameter estimates in Sabi sheep] ,  Genetic parameter estimates in Sabi sheep
Journal Article 2003

Autor: Matika, O. Wyk, J.B. van Erasmus, G.J. Baker, R.L.

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 ...

Enlace original: https://cgspace.cgiar.org/handle/10568/33172

Investigación en Agricultura
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Matika, O. ,  Wyk, J.B. van ,  Erasmus, G.J. ,  Baker, R.L. ,  [A description of growth, carcass and reproductive traits of Sabi sheep in Zimbabwe] ,  A description of growth, carcass and reproductive traits of Sabi sheep in Zimbabwe
Journal Article 1995

Autor: Snyman, M.A. Erasmus, G.J. Wyk, J.B. van

Data, consisiting of 4235 lamb records, obtained from the Foundation Afrino Sheep stud at the Carnarvon Experimental station, were used to investigate factors influencing birth weight, weaning weight, monthly body weight from five to 12 months, body weight at 18 months of age as well as clean fle...

Enlace original: https://cgspace.cgiar.org/handle/10568/66753

Investigación en Agricultura
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Snyman, M.A. ,  Erasmus, G.J. ,  Wyk, J.B. van ,  [Non-genetic factors influencing growth and fleece traits in Afrino sheep] ,  Non-genetic factors influencing growth and fleece traits in Afrino sheep
Journal Article 1992

Autor: Cloete, S.W.P. Delport, G.J. Erasmus, G.J. Olivier, J.J. Heydenrych, H.J. Toit, Elizabeth du

This study was undertaken to investigate the genetic stability of an unselected Conlrol Group of South African Merino sheep and genetic change in a flock selected for increased clean fleece mass (Selection Group) under the same environmental conditions. Data regarding 14-17 months clean fleece ma...

Enlace original: https://cgspace.cgiar.org/handle/10568/66914

Investigación en Agricultura
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Cloete, S.W.P. ,  Delport, G.J. ,  Erasmus, G.J. ,  Olivier, J.J. ,  Heydenrych, H.J. ,  Toit, Elizabeth du ,  [Environmental and genetic trends in clean fleece mass, live mass and fiber diameter in selection and control flocks involving a selection experiment for increased clean fleece mass in South African Merino sheep] ,  Environmental and genetic trends in clean fleece mass, live mass and fiber diameter in selection and control flocks involving a selection experiment for increased clean fleece mass in South African Merino sheep

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