STRUCTURE OF FEATURES VARIABILITY IN <i>ALLIUM GUNIBICUM MISCZ. EX GROSSH.</i> SEED PRODUCTIVITY WHEN INTRODUCING ALONG AN ALTITUDINAL GRADIENT
Studies of seed productivity, intrapopulation and interpopulation variability of features, survival strategies of endemic, rare and endangered species can objectively evaluate the state of cenopopulations of these species and organize their effective protection. In this regard, the seed productivity of Dagestanian endemic Allium gunibicum was analysed in the conditions of introduction to different altitude levels and collected from different districts of Mountain Dagestan (near village Mogokh 760 m above sea level (below sea level), Tsudakhar 1100 m and Gunib plateau 1770 m). Experimental studies were carried out at different altitude levels at Tsudakhar (1100 m below sea level) and Gunib (1700 m) experimental bases of Mountain Botanical garden, Dagestan Scientific Center of Russian Academy of Sciences. The analysis of Allium gunibicum seed productivity showed that with increasing the altitude of the collecting ground, the features of seed production decreases (seeds number in inflorescence is from 109 to 62 pcs), at this there is a tendency to increase the mass of 100 seeds (from 102 to 118 mg). Real seed productivity of A. gunibicum significantly gives in to the potential (the ratio of seed setting is 0,2-0,4) that is associated with incomplete seeds setting and suggests a low degree of realizing the potential of seeds setting in the conditions of introduction.