1. Department of Horticulture, Laboratory of Pomology Aristotle University of Thessaloniki Thessaloniki Greece
2. Department of Chemistry, Laboratory of Analytical Chemistry National and Kapodistrian University of Athens Athens Greece
3. Institute of Plant Breeding and Genetic Resources, ELGO‐DEMETER Thessaloniki Greece
4. Joint Laboratory of Horticulture, ELGO‐DEMETER Thessaloniki Greece
5. Institute of Soil and Water Resources, ELGO‐DEMETER Thessaloniki Greece