Short Note: Identification of Natural Hybrids Juglans x intermedia C ARR. Using Isoenzyme Gene Markers

Summary Isoenzyme polymorphism in bud tissues from Juglans nigra L., Juglans regia L., and their natural hybrids Juglans x intermedia CARR. was analysed. The results reveal that isoenzyme variants of the enzyme systems Aspartat aminotransferase (AAT) and Phosphoglucomutase (PGM) are suitable to identify hybrids of known as well as unknown origin genetically. The use of this method is suggested for forest nursery practice to distinguish hybrids at an early ontogenetic stage.