1. Department of Botany and Nature Protection; University of Warmia and Mazury in Olsztyn; Plac Łódzki 1 Olsztyn 10-727 Poland
2. Department of Agriculture Systems; University of Warmia and Mazury in Olsztyn; Plac Łódzki 4 Olsztyn 10-957 Poland
3. Department of Plant Breeding and Seed Production; University of Warmia and Mazury in Olsztyn; Plac Łódzki 3 Olsztyn 10-957 Poland