1. State Key Lab for Conservation and Utilization of Subtropical Agro-Biological Resources, Guangxi University, Nanning, Guangxi 530005, China
2. Guangxi Key Lab for Sugarcane Biology, Guangxi University, Nanning, Guangxi 530005, China
3. IRREC-IFAS, University of Florida, Fort Pierce, FL 34945, U.S.A.