1. Instituto de Ciencias de la Vid y del Vino, Consejo Superior de Investigaciones Científicas - Universidad de la Rioja - Gobierno de la Rioja, Logroño 26007, Spain
2. Summerland Research and Development Centre, Agriculture and Agri-Food Canada, Science and Technology Branch, Summerland, British Columbia V0H1Z0, Canada
3. South Australian Research and Development Institute, GPO Box 397, Adelaide SA 5001, Australia; and School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, SA 5005, Australia