1. School of Biology and Biological Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong 510006, P. R. China
2. The Affiliated Middle School of Lingnan Normal University, Chikan District, Zhanjiang, Guangdong 524048, China
3. Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Crop Germplasm Resources Conservation and Utilization, Guangzhou 510640, China