Zs. Szani National Institute for Agricultural Quality Control Hungary, H-1024 Budapest, Keleti Károly utca 24., Hungary 2 Fruit Growing Research Institute, Cegléd H-2400 Cegléd, Szolnoki út 52., Hungary
K. Vincek National Institute for Agricultural Quality Control Hungary, H-1024 Budapest, Keleti Károly utca 24., Hungary 2 Fruit Growing Research Institute, Cegléd H-2400 Cegléd, Szolnoki út 52., Hungary
Z. Erdős Fruit Growing Research Institute, Cegléd H-2400 Cegléd, Szolnoki út 52., Hungary
Gy. Végvári Corvinus University, Budapest Faculty of Horticultural Science H-1118 Budapest, Villányi út 29-43., Hungary
Z. Szabó University of Debrecen, Centre of Agricultural Sciences, Institute for Extension and Development, H-4032 Debrecen, Böszörményi út 138., Hungary
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Apricot seedlings are one of the most widely used rootstocks in apricot growing of Hungary. The National List of Hungary contains 7 apricot seedling rootstocks varieties. The production of apricot graft on seedling rootstock takes 3 years from the seed production to the complete graft and requires more space. It is important to provide the trueness to variety name during this process. In the genus Prunoideae not only the plant but also the stone should have typical characteristics. It seems to be useful to examine the morphology of stone. The observed varieties were 'Tengeribarack C.1300', 'Tengeribarack C.1301', 'Tengeribarack C.1650', 'Tengeribarack' C.1652', 'Tengeribarack C.145', 'Tengeribarack C.1426' and 'Tengeribarack C.2546`.1t seems to be the most suitable characteristic to make a distinction between these varieties by stone, the ratio height of stone to lateral width of stone, the ratio of height of stone to ventral width of stone, the ratio of lateral width of stone to ventral width of stone and the ratio of ventral zone to ventral width. From not measured characteristic seems to be most utilizable to make distinction: the fusion of dorsal groove margins, the shape of apex, the presence of a mucro of the apex, the shape of stalk end in lateral view and the texture of lateral surfaces.