Affiliation: | (1) Kyushu Tokai University, Choyo, Aso, Kumamoto 869-1404, Japan e-mail: yoshihiro.okada@sapporobeer.co.jp, Present address: Y. Okada, Plant Bioengineering Research Laboratories, Sapporo Breweries Ltd., Kizaki, Nitta, Gunma 370-0393, Japan, JP;(2) Kyushu National Agricultural Experiment Station, Kikuchi, Kumamoto 861-1192, Japan, JP;(3) National Institute of Agrobiological Resources, Tsukuba, Ibaraki 305-8602, Japan, JP;(4) Nagasaki Laboratory, Japan Science and Technology Corporation, Ohmura, Nagasaki, 856-0026, Japan, JP |