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P. Obara-Okeyo, Kouei Fujii and Shunji Kako

Seventy Cymbidium (Swartz.) cultivars were analyzed for isozyme variability in eight enzyme systems by starch gel electrophoresis. All systems studied [aspartate aminotransferase (AAT), malate dehydrogenase (MDH), alcohol dehydrogenase (ADH), phosphoglucomutase (PGM), glucose phosphate isomerase (GPI), triosephosphate isomerase (TPI), and shikimate dehydrogenase (SKDH)] showed polymorphism. When all enzyme systems were evaluated, 68 of the 70 Cymbidium cultivars could be distinguished. Isozymes could not distinguish betwen the cultivars Golden Star `Kumamoto' and Golden Star `Sunrise'. No cultivar showed a single unique pattern, but the TPI system gave one “diagnostic” pattern. Segregation ratios from controlled crosses suggested that LAP-1 is simply inherited and controlled by at least two alleles.