1. Yakima Agricultural Research Laboratory; Agricultural Research Service; USDA; Wapato WA USA
2. New Zealand Institute for Plant & Food Research Limited; Lincoln New Zealand
3. Agriculture and Agri-Food Canada; Summerland Research and Development Centre; Summerland BC Canada
4. Facultad de Ciencias Agrarias; Instituto de Producción y Sanidad Vegetal; Universidad Austral de Chile; Valdivia Chile