1. Cocoa Research Institute of Ghana, P.O. Box 8, New Akim-Tafo, E/R, Ghana
2. The Centre for International Forestry Research and World Agroforestry (CIFOR-ICRAF), Côte d’Ivoire Country Program, Cocody, Abidjan 08 BP 2823, Côte d’Ivoire
3. School of Plant Sciences, 1140 E. South Campus Dr., The University of Arizona, Tucson, AZ 85721, USA
4. Mars Wrigley Plant Science Laboratory, 434 G Street, Suite 200, Davis, CA 95616, USA