Borys Yakubenko’s scientific contributions

The history of the formation of the collection of rare fruit and ornamental plants in the Agronomic Experimental Station of the National University of Life and Environmental Sciences of Ukraine is described. Now the collection includes 284 species of trees and shrubs, which belong to 52 genera and 16 families. There are a total of 1183 accessions, including 552 cultivars and selects. Accession number, species and cultivar names, and as well as the origin of samples are specified. Numerous new binominal combinations are proposed in genera Aria, Hedlundia, and Micromeles (Rosaceae).

The topics on taxonomy and nomenclature of 56 non-small fruit crops, along with a brief history of culture, a value and a state of assortment are covered. The problems of fruit breeding are formulated; recommendations on seed and clonal propagation are given. The new nothogenus ×Fragarum Mezhenskyj = Fragaria L. × Comarum L. is established and the new combination ×Fragarum roseum (Mabberley) Mezhenskyj, comb. nov. is proposed.