Haifeng Wang1, Chunce Guo2, Hong Ma3, Ji Qi4. 1. State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Lab of Sugarcane Biology, College of Agriculture, Guangxi University, Nanning, Guangxi, China. 2. Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization, Forestry College, Jiangxi Agricultural University, Nanchang, China. 3. Department of Biology and the Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA. 4. State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China. Electronic address: qij@fudan.edu.cn.