Affiliation: | (1) National Institute of Agrobiological Resources, Tsukuba, Ibaraki 305, Japan, JP;(2) Faculty of Agriculture, Meiji University, 1-1-1 Higashimita, Tamaku, Kawasaki 214, Japan, JP;(3) National Agriculture Research Center (NARC), Tsukuba, Ibaraki 305, Japan, JP |