1. Department of Agriculture, Tokyo University of Agriculture, Atsugi, Japan
2. Department of Lowland Farming, NARO Kyushu-Okinawa Agricultural Research Center, Fukuoka, Japan
3. Department of Agriculture, Fukuoka prefectural Agriculture and Forestry Research Center, Fukuoka, Japan
4. Department of Crop research, Saga prefectural Agricultural Research Center, Saga, Japan