Abbreviations: BAP- 6-benzilaminopurine; MS - Murashige and Skoog Media (Murashige and Skoog, 1962); MSa - modified MS medium, gelled with Plant Agar; MSs - modified MS medium, gelled with 50 g/l wheat starch; MSsP - modified MS medium, gelled with 80 g/l potato starch; CPPU- forchlorphenuron; cv./cvs – cultivar/cultivars