1. Department of Plant Sciences, College of Life Sciences, State Key Laboratory of Hybrid Rice Wuhan University Wuhan 430072 China
2. School of Biological Sciences University of Bristol Life Sciences Building, 24 Tyndall Avenue Bristol BS8 1TQ UK
3. Institut Agro LEPSE, INRAE, University of Montpellier Montpellier 75338 Cedex 07 France
4. Centro de Biotechnologia Universidade Federal do Rio Grande do Sul Porto Alegre 91501970 Brazil
5. John Innes Centre Norwich Research Park Norwich NR4 7UH UK
6. Rothamsted Research West Common Harpenden Hertfordshire AL5 2JQ UK