I.V. Ulanovskaya’s scientific contributions

Modern collections of flower-ornamental crops of the Nikitsky Botanical Gardens (NBG) are formed as a result of long-term introduction and breeding researches begun, respectively, for Rosa L. in 1812 and 1824., for Syringa L. in 1813 and 1941, for Iris × hybrida hort. in 1812 and 1986, for Hemerocallis × hybrida hort. In 1812 and 1995, for Clematis L. in 1817 and 1953, for Tulipa L. in 1812 and 1960, for Canna × hybrida hort. In 1812 and 1948, for Chrysanthemum × morifolium Ramat. in 1812 and 1939. Each collection currently includes cultivars of both foreign and domestic selection, including those created in the NBG. The total amount of the collections is 2406 species, cultivars and forms. The collections of roses, clematises, cannas and chrysanthemums are the largest in the Russian Federation. The Rosa collection includes 35 garden groups from 36 existing ones, Syringa – 6 from 7 groups of flower coloring, Iris – all 6 existing garden groups, Clematis – 14 garden groups, Tulipa – 14 garden classes from 15, Canna – both existing garden groups, Chrysanthemum – all 11 classes of this crop. Thus, the formed collections quite fully reflect the created varietal diversity of each of these crops and provide a full material for further breeding and identification of adapted assortment for landscaping in the South of Russia.

The article describes approaches to the study of fruiting cultivars Iris x hybrida hort. of the collection of the Nikitsky Botanical Gardens National Scientific Center of the garden group of high species, on the example of the cultivar 'Sky Hooks', and presents the primary processing of experimental data. The ratio of the average values of potential and actual seed productivity depends on: the number of generative shoots on the plant; the number of "levels" or branches on the generative shoot; the number of flowers and the number of fruits on the generative shoot; the number of fruits at a certain "level" of their location. Actual seed production of cultivars 'Sky Hooks' two times less potential, regardless of the number of generative shoots per plant, "level" location of the fetus, the number of "levels" on generative shoots, number of flowers and fruits on one generative shoots. The highest average values of potential and actual seed productivity correspond to the 3rd and 4th "levels".