1. Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
2. Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
3. International Cooperation Center for Agricultural Education, Nagoya University, Nagoya, Japan
4. Mountainous Region Agricultural Research Institute, Aichi Agricultural Research Center, Toyota, Japan
5. Applied Social System Institute of Asia, Nagoya University, Nagoya, Japan
6. Bioscience and Biotechnology Center, Nagoya University, Nagoya, Japan
7. Kenya Agricultural and Livestock Research Organization, Mwea-Tebere Center, Kerugoya, Kenya