1. National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop Science Chinese Academy of Agricultural Sciences Beijing 100081 China
2. Shandong Rice Research Institute Jinan 250100 China
3. Joint International Research Laboratory of Metabolic and Developmental Sciences School of Life Sciences and Biotechnology Shanghai Jiao Tong University Shanghai 200240 China
4. Institute of Cellular and Molecular Botany University of Bonn Bonn D‐53115 Germany