J. K. Mwololo
International Crops Research Institute for the Semi-Arid Tropics, Chitedze Agricultural Research Station, P.O. Box 1096, Lilongwe, Malawi
Malawi

S. Mugo
International Maize and Wheat Improvement Center (CIMMYT), P.O.Box 1041, 00621 Village Market, Nairobi.
Kenya

M. Otim
National Crops Resources Research Institute (NaCRRI), Namulonge, P.O.BOX 7084 Kampala, Uganda
Uganda

SW Munyiri
Chuka University, P.O. Box 109-60400, Chuka, Kenya
Kenya

P. Okori
International Crops Research Institute for the Semi-Arid Tropics, Chitedze Agricultural Research Station, P.O. Box 1096, Lilongwe, Malawi
Malawi