The morphological structure and vitality of pollen Pyrus L. genus ex situ in north-eastern part of the Greater Caucasus

The process of fertilization and fetal development is an important biological phenomenon that determines the efficiency of fruit cultivation. Currently, studies on the morphology of pollen from various crops and determining the viability of closely related species have become increasingly relevant. The paper presents data on the study of pollen from species of the Genus Pyrus L. The author analyzed the morphological structure and viability of pollen from the following species: Pyrus communis L., Pyrus caucasica Fed., Pyrus ×georgica Kuth., Pyrus vsevolodii Heideman, Pyrus salicifolia Pall. The work was carried out ex-situ. As a result of the work done, there were no significant differences between the morphological structure and the degree of pollen fertility. This is probably due to their identical biological characteristics.