1. College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, No.6 Tongwei Road Nanjing, P. R. China
2. Department of Rural Development, Nanjing Agricultural University, No.6 Tongwei Road Nanjing, P. R. China
3. Bioinformatics Core, Purdue University, 155 South Grant Street, West Lafayette, Indiana, USA