Abstract
The Sargent apple tree is highly valued for its decorative qualities, it is used in breeding work when developing new ornamental varieties. To assess the breeding potential, as well as planning crosses, information is needed on the variability of the morphometric traits of the apple flower and fruit, as well as the presence of a relationship between these traits. The research was carried out in the laboratory of cultivated plants of the Tsytsin Main Botanical Garden on 12 quantitative traits of flower and fruit. It was found that almost all traits are characterized by a low level of polymorphism of 7-15% (flower diameter - 13.2%, pedicel thickness - 14.9%, peduncle length - 8.3%, fruit length - 4.7%, fruit diameter - 5.7%) or an average level (16-25%), except for the mass of seeds (40%) and the number of seeds in the fruit (33.9%). An inverse correlation was found between the length of the anther and the number of seeds inside the fruit (r = -0.46), as well as strong direct relationships between the diameter of the fruit and the weight of the fruit (r = 0.79) and the diameter of the fruit and the length of the fruit (r = 0, 78). A reliable direct relationship between the group was also revealed: flower length, filament length, pedicel thickness, fruit length, fruit diameter, fruit weight. Keywords: POLYMORPHISM, FLOWERS, CRABAPPLES, SORBOMALUS, MALUS SARGENTII, SARGENT APPLE TREE
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