Plant Breeding Division, Cocoa Research Institute of Nigeria PMB 5244Ibadan, Nigeria
Central Biotechnology Laboratory, International Institute of ropical Agriculture PMB 5320Ibadan, Nigeria
Department of Horticulture, 422 Life Sciences Building, Pennsylvania tate University, University Park, PA 16802,Irvine, USA
Department of Genetics and Biotechnology, University of Calabar, PMB 1115,Calabar, Nigeria