Unoki, Saeka; Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan; Sitaresmi, Trias; Indonesian Center for Rice Research; Ehara, Hiroshi; Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan; Nugraha, Yudhistira; BB Padi (Pusat Penelitian dan Pengembangan Tanaman Pangan, )