Affiliation: | 1.Sierra Leone Agricultural Research Institute, Tower Hill, Freetown, PMB 1313, Sierra Leone ;2.International Institute of Tropical Agriculture, Ibadan, PMB 5320, Nigeria ;3.West Africa Centre for Crop Improvement, College of Basic and Applied Sciences, University of Ghana, P.O. Box LG 30, Legon, Accra, Greater Accra, Ghana ; |