1State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China 2National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, the Chinese Academy of Agricultural Sciences, Beijing 100081, China
**Correspondences:
Email: Hongning Tong (tonghongning@caas.cn); Chengcai Chu (ccchu@genetics.ac.cn, Dr. Chu is fully responsible for the distribution of all materials associated this article)