1. Discipline of Genetics School of Life Sciences University of KwaZulu–Natal Private Bag X01 Scottsville3209South Africa
2. Discipline of Animal and Poultry Science School of Agricultural Earth and Environmental Sciences University of KwaZulu–Natal Private Bag X01 Scottsville3209South Africa
3. Grootfontein Agricultural Development Institute Private Bag X529 Middelburg EC5900South Africa
4. Agricultural Research Council, Biotechnology, Platform Private Bag X5 Onderstepoort0110South Africa