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"Experientia docet" - Experience is the best teacher

Across flock genetic parameter estimation for yearling body weight and fleece traits in the South African Dohne Merino populatio

  • 2008
  • Issue: 1
  • Volume: 38
J.B. van Wyk, J.W. Swanepoel, S.W.P. Cloete, J.J. Olivier and G.J. Delport Page: 31 - 37

Accurate genetic parameter estimates are needed upon which to perform multiple-trait across flock breed analyses. Genetic parameters for yearling body weight (BW), clean fleece weight (CFW) and mean fibre diameter (MFD) were estimated using records of 107 389 individuals (the…

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Genotype x ecological region interaction in the Nguni cattle breed

  • 2004
  • Issue: 6
  • Volume: 34
M. van Niekerk, F.W.C. Neser and J.B. van Wyk Page: 116 - 118

Weaning weight (WW) records were used to investigate the presence of a genotype x ecological region interaction as well as the magnitude and significance of such an interaction. Records from herds were allocated to one of three veld types that…

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An investigation into possible genotype x environment interactions for weaning weight in South African Mutton Merino sheep

  • 1998
  • Issue: 3
  • Volume: 28
F.W.C. Neser, G.J. Erasmus, J.B. van Wyk, C.S. van Deventer Page: 179 -

Weaning weight records available for the South African Mutton Merino breed wereutilised to investigate the possibility of a genotype by environment interaction in the breed. A direct heritability estimate of 0.308 ± 0.022 was obtained. Including flock-year-season x sire interaction…

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