The collection of Pyrus L. in the arboretum of M.M. Gryshko National Botanical Garden of the NAS of Ukraine

Experience of 8 species of the genus Pyrus L. introduction in the arboretum of M.M. Gryshko National Botanical Garden of the NAS of Ukraine was summarized. The literature sources were analyzed and the own researche was carried out. Under natural condition of introduction the seasonal passage of phenological phases development, the growth of annual shoots, winter and drought hardiness, high quality seeds were studied. As a result, it was found that all experimental plant species Pyrus in the arboretum settled down a full annual cycle of individual development, blooming, fruit bearing and produce good-quality seeds. The best adapted are representatives of the South-European, Crimean and Caucasian (wide habitat) origin P. аmіgdaliformis Vill., P. calleriana Decne., P. elaeagnifolia Pall., P. grosshemii Fed., P. salicifolia Pall. They are drought resistant and hardy, have good growth capacity. Far East’s representative P. ussuriensis Maxim. ex Rupr. It is characterized by a high degree of hardiness, however, it suffers from the summer drought and therefore falls outside the collection. Least winter- and drought resistant have proven the re presentatives of the Western Caucasus and Western China P. georgica Kuth. and P. pashia Bush.-Ham. ex D. Don.