Last update: August 17, 2011 03:31:37 PM E-mail Print


Presence of inbreeding during a selection experiment with Merino sheep

G.J. Erasmus, A.O. de Lange,1 G.J. Delport2 and J.J. Olivier3

Department of Animal Science, University of the Orange Free State, P.O. Box 339, Bloemfontein 9300, Republic of South Africa


Present addresses:

1 ARDRI, University of Fort Hare, Alice, 5700;

2 SA Fleece Testing Centre, ADSRI, Agricultural College, Middelburg 5900,

3 Grootfontein Agricultural College, Middelburg 5900, Cape Province.


Individual inbreeding coefficients were computed in three lines of a selection experiment by using the algorithm of Quaas (1976). The mean inbreeding was about 2% at the end of the experiment and no significant difference was found among lines selected for increased fleece mass and visual overall excellence, and an unselected control. Evidence suggests that inbreeding could have had no appreciable effect on selection response or level of production and reproduction in the three lines. 



South African journal of animal science 21 (4)