College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, No.6 Tongwei Road Nanjing, P. R. China, 210095.|College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, No.6 Tongwei Road Nanjing, P. R. China, 210095.|Department of Rural Development, Nanjing Agricultural University, No.6 Tongwei Road Nanjing, P. R. China, 210095.|Bioinformatics Core, Purdue University, 155 South Grant Street, West Lafayette, Indiana 47907, USA.|Bioinformatics Core, Purdue University, 155 South Grant Street, West Lafayette, Indiana 47907, USA.|Bioinformatics Core, Purdue University, 155 South Grant Street, West Lafayette, Indiana 47907, USA.