1. Laboratory of Plant Breeding and Biometry, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
2. Agricultural Economics Research Institute, Hellenic Agricultural Organization—DIMITRA, Kourtidou 56-58, 11145 Athens, Greece
3. Department of Biology and Biotechnology “L. Spallanzani”, University of Pavia, 27100 Pavia, Italy