Correlations of subjectively assessed fleece and conformation traits with production and reproduction in Afrino sheep

South African Journal of Animal Science

Volumn 32, Issue 2, 2002, Pages 88-96

  Snyman, M A ^a   Olivier, W J ^a  

^a Grootfontein Agricultural Development Institute   (South Africa)

Author keywords

Body weight; Correlations; Linearly assessed type traits; Reproduction; Wool traits

Indexed keywords

ANIMALIA; OVIS; OVIS ARIES; VERTEBRATA;

EID: 0036394233     PISSN: 03751589     EISSN: None     Source Type: Journal    
DOI: 10.4314/sajas.v32i2.3750     Document Type: Article

References (19)

1. Cloete, S.W.P., Olivier, J.J. & Du Toit, E., 1992. Linear type traits in a Merino flock subjected to selection for increased clean fleece mass and an unselected control flock. S. Afr. J. Anim. Sci. 22, 70-73.
2. Crook, B.J., Piper, L.R. & Mayo, O., 1994. Phenotypic associations between fibre diameter variability and greasy wool staple characteristics within Peppin Merino stud flocks. Wool Tech. Sheep Breed. 42, 304-318.
3. Fogarty, N.M., 1995. Genetic parameters for live weight, fat and muscle measurements, wool production and reproduction in sheep: A review. Anim. Breed. Abstr. 63, 101-143.
4. Fogarty, N.M., Brash, L.D. & Gilmour, A.R., 1994. Genetic parameters for reproduction and lamb production and their components and live weight, fat depth and wool production in Hyfer sheep. Aust. J. Agric. Res. 45, 443-457.
5. Gilmour, A.R., Thompson, R, Cullis, B.R. & Welham, S.J., 1997. ASREML, Biometric Bulletin, 3, NSW, Agriculture, p. 92.
6. Groenewald, P.G.J., Olivier, J.J. & Olivier, W.J., 1999. Heritability estimates for Merino sheep obtained from a national progeny test. S. Afr. J. Anim. Sci. 29, 174-178.
7. th Conf., Dubbo, NSW, Australia, April 1997, Part 1, 524-529.
8. Lewer, R.P., Woolaston, R.R. & Howe, R.R., 1995. Studies on Western Australian Merino sheep. III. Genetic and phenotypic parameter estimates for subjectively assessed and objectively measured traits in ewe hoggets. Aust. J. Agric. Res. 46, 379-388.
9. Littell, R.C., Freud, R.J., Spector, P.C., 1991. SAS-system for linear models (3rd ed.), SAS Institute. Inc., Cary, North Carolina. pp. 137-198.
10. th SASAS congress, Nelspruit, 1-3 July.
11. Olivier, J. J., Delport, G.J., Erasmus, G.J. & Eksteen, T.J., 1987. Linear type scoring in Merino sheep. Karoo Agric. 3, 1-4.
12. Olivier, W.J., Snyman, M.A., Olivier, J.J., Van Wyk, J.B. & Erasmus, G.J., 2001. Direct and correlated selection responses to selection for total weight of lamb weaned in Merino sheep. S. Afr. J. Anim. Sci. 31, 115-121.
13. Snyman, M.A., Cloete, S.W.P. & Olivier, J.J., 1998a. Genetic and phenotypic correlations of total weight of lamb weaned with body weight, clean fleece weight and mean fibre diameter in three South African Merino flocks. Livest. Prod. Sci. 55, 157-162.
14. Snyman, M.A., Erasmus, G.J. & Van Wyk, J.B., 1995a. Non-genetic factors influencing growth and fleece traits in Afrino sheep. S. Afr. J. Anim. Sci. 25, 70-74.
15. Snyman, M.A., Erasmus, G.J. & Van Wyk, J.B., 1998b. The possible genetic improvement of reproduction and survival rate in Afrino sheep using a threshold model. S. Afr. J. Anim. Sci. 28, 120-124.
16. Snyman, M.A., Erasmus, G.J., Van Wyk, J.B. & Olivier, J.J., 1995b. Direct and maternal (co)variance components and heritability estimates for body weight at different ages and fleece traits in Afrino sheep. Livest. Prod. Sci. 44, 229-236.
17. Snyman, M.A., Erasmus, G.J., Van Wyk, J.B. & Olivier, J.J., 1998c. Genetic and phenotypic correlations among production and reproduction traits in Afrino sheep. S. Afr. J. Anim. Sci. 28, 74-81.
18. Snyman, M.A., Olivier, J.J., Erasmus, G.J. & Van Wyk, J.B., 1997. Genetic parameter estimates for total weight of lamb weaned in Afrino and Merino sheep. Livest. Prod. Sci. 48, 111-116.
19. th Conf., Dubbo, NSW, Australia, April 1997, Part 1, 153-157.