Guangxi Subtropical Crops Research Institute Nanning 530001 P.R.China;
College of Horticulture & Forestry Sciences Huazhong Agricultural University/Key Laboratory of Horticultural Plant Biology Ministry of Education Wuhan 430070 P.R.China;
Rice Research Institute Guangxi Academy of Agricultural Sciences Nanning 530007 P.R.China;
National Key Laboratory of Plant Molecular Genetics/Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences/Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 P.R.China;