Agroinformatics Division, National Agriculture and Food Research Organization, Agricultural Research Center, Kannondai, Tsukuba, Ibaraki, 305-8666, Japan. hayatk@affrc.go.jp|Agroinformatics Division, National Agriculture and Food Research Organization, Agricultural Research Center, Kannondai, Tsukuba, Ibaraki, 305-8666, Japan. hayatk@affrc.go.jp