skip to Main Content
Join SASAS

"Experientia docet" - Experience is the best teacher

The effects of dietary energy and protein concentrations on ostrich skin quality (Short communication)

  • 2006
  • Issue: 1
  • Volume: 36
S.W.P. Cloete, S.J. van Schalkwyk, T.S. Brand, L.C. Hoffman and C.J. Nel Page: 40 - 44

The effects were investigated of energy and protein concentrations (with associated amino acid concentrations) in ostrich diets on leather quality of the skins of 50 ostriches. Energy concentrations were 9.0, 10.5 and 12.0 MJ ME/kg diet and protein concentrations were…

Read more

Test-day models for South African dairy cattle for participation in international evaluations

  • 2006
  • Issue: 1
  • Volume: 36
B.E. Mostert, H.E. Theron, F.H.J. Kanfer and E. van Marle-Köster Page: 58 - 70

Variance components and breeding values of production traits and somatic cell score of South African Guernsey, Ayrshire, Holstein and Jersey breeds have been estimated using a multi-lactation repeatability test-day model, including tests of the first three lactations as repeated measures…

Read more

Comparison of breeding values and genetic trends for production traits estimated by a Lactation Model and a Fixed Regression Tes

  • 2006
  • Issue: 2
  • Volume: 36
B.E. Mostert, H.E. Theron, F.H.J. Kanfer and E. van Marle-Köster Page: 71 - 78

A comparison of breeding values and genetic trends of production traits from two models is made. One set of breeding values and trends was estimated by the September/October 2003 South African National Genetic Evaluation, using a Lactation Model (LM). The…

Read more

Heritability of live weight and condition score in a Holstein herd and correlations with milk traits – preliminary estimates

  • 2006
  • Issue: 2
  • Volume: 36
C.J.C. Muller, S.W.P. Cloete, J.J. Olivier, J.A. Botha and H. de Waal Page: 79 - 88

Genetic and environmental parameters for live weight and condition score have been determined for Holstein cows. Genetic correlations with milk traits were also derived. Monthly records were modelled by cubic splines, while the direct, additive effects of animal and the…

Read more

QTL analysis of production traits on SSC3 in a Large White x Meishan pig resource family (Short communication)

  • 2006
  • Issue: 2
  • Volume: 36
B. Zuo, Y.Z. Xiong, Y.H. Su, C.Y. Deng, M.G. Lei, F.E. Li, R. Zheng and S.W. Jiang Page: 122 - 125

In order to locate the genetic regions that are responsible for economically important traits, a resource population was established by crossing Large White boars and Meishan sows. Phenotypic data of a total of 287 F2 offspring were collected from 1998…

Read more

Utilisation of synthetic amino acids by broiler breeder hens

  • 2006
  • Issue: 2
  • Volume: 36
M.K. Nonis and R.M. Gous Page: 126 - 134

This study was conducted to examine the response of broiler breeder hens to feeds supplemented with synthetic lysine and methionine when fed once or twice daily during peak production. Replacing intact protein with increasing amounts of free lysine and methionine,…

Read more
Back To Top