1. Crop Development Division, National Agriculture and Food Research Organization Agricultural Research Center, Niigata 943-0193, Japan
2. National Center for Plant Gene Research, Key Laboratory of Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
3. Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
4. Photosynthesis and Photobiology Research Unit, National Institute of Agrobiological Sciences, Tsukuba 305-8602, Japan
5. State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, People's Republic of China
6. Institute of Radiation Breeding, National Institute of Agrobiological Sciences, Hitachi-ohmiya 319-2293, Japan
7. Bioscience and Biotechnology Center, Nagoya University, Nagoya 464-8601, Japan
8. Rice Research Division, National Institute of Crop Science, National Agriculture and Food Research Organization, Tsukuba 305-8518, Japan
9. Department of Agricultural and Environmental biology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan
10. Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan