1. Department of Molecular Genetics, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305–8602, Japan (M.Y., T.S.);
2. Institute of the Society for Techno-innovation of Agriculture, Forestry and Fisheries, Tsukuba, Ibaraki 305-0854, Japan (S.K., Y.T.); and
3. Bio-oriented Technology Research Advancement Institution, Omiya, Saitama 331-8537, Japan (H.L.)