1. Key Laboratory of Agricultural Water Resources; Hebei Laboratory of Agricultural Water-Saving; Center for Agricultural Resources Research; Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; 286 Huaizhong Rd Shijiazhuang 050021 China
2. Department of Botany and Plant Sciences; Institute of Integrative Genome Biology; University of California; Riverside CA 92521 USA
3. State Key Laboratory of Plant Genomics; Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; Beijing 100101 China
4. College of Life Sciences; Hebei Agricultural University; Baoding 071001 China
5. Howard Hughes Medical Institute; University of California; Riverside CA 92521 USA