1. Department of Biology, 300 East Saint Mary Blvd., University of Louisiana, Lafayette, Louisiana 70504‐2451 USA
2. USDA‐ARS‐SHRS, National Germplasm Repository, 13601 Old Cutler Road, Miami, Florida 33158 USA
3. College of Life Science, Nanjing University, Nanjing 210093, P. R. China