1. African Centre for Crop Improvement, University of KwaZulu-Natal, College of Agriculture, Engineering and Science, School of Agricultural, Earth and Environmental Sciences, Scottsville, Pietermaritzburg South Africa
2. Zambia Agricultural Research Institute (ZARI), Mt. Makulu Research Station, Chilanga, Zambia
3. West African Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, Legon, Ghana