1. International Institute of Tropical Agriculture (IITA); Ibadan Nigeria
2. Department of Biochemistry; University of Ibadan; Ibadan Nigeria
3. Japan International Research Center for Agricultural Sciences (JIRCAS); c/o International Institute of Tropical Agriculture; Ibadan Nigeria
4. Department of Botany and Agricultural Biotechnology; University of Khartoum; Khartoum Sudan
5. Department of Applied Plant Science; School of Agriculture and Food Security; Maseno University; Maseno Kenya