1. Department of Plant Sciences & Biotechnology; Georgikon Faculty; University of Pannonia; Deák F. St. 16. Keszthely H-8360 Hungary
2. Agricultural Institute; Centre for Agricultural Research; Hungarian Academy of Sciences; Brunszvik St. 2. Martonvásár H-2462 Hungary
3. Department of Crop Production & Soil Sciences; Georgikon Faculty; University of Pannonia; Deák F. St. 16. Keszthely H-8360 Hungary