1. Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences, Okinawa, Japan
2. Faculty of Agriculture, Tottori University, Tottori, Japan
3. Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, Kumamoto, Japan
4. Research Development and Extension Department Agro-Based Laboratory, Sugar Regulatory Administration, Department of Agriculture, Bacolod city, Republic of the Philippines