1. Department of Plant and Environmental Sciences, Clemson University, 105 Collings Street, Clemson, SC 29634, USA
2. Horticulture Section, School of Integrative Plant Science, Cornell University, Geneva, NY 14456, USA
3. Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Fruitcentre, PCiTAL, Gardeny Park, Fruitcentre Building, 25003 Lleida, Spain