Endogenous variability of sizes and mass of seeds of spanish bayonet (Yucca aloifolia L.) in Nikita botanical garden depending on artificial pollination type

The results of study of endogenous variability of sizes and mass of seeds of the Spanish bayonet ( Yucca aloifolia L. ) and Spanish bayonet ‘Marginata' ( Yucca aloifolia L. ‘Marginata') by biometric data have been given. Description of the endogenous variability's amplitude evaluated by means of objective mathematical criteria has been provided. The similarities and differences, correlative connection and character of the distribution curves of investigated parameters are shown. It has been for the first time determined that the amplitude range of endogenous variability of seeds of the Spanish bayonet and the Spanish bayonet ‘Marginata' fluctuates over a wide range and depends, first of all, on the character and, to a lesser degree, on the form affiliation and does not depend on artificial pollination type. In case of an open pollination and hybridogeny with the use of pollen of other species, the variability of the seeds' weight is much higher than during artificial pollination of the Spanish bayonet and Spanish bayonet ‘Marginata' within species. The lowest and simultaneously the highest limit of the seed's weight is attained during an open pollination. The growth correlations which implement the best option of an interaction of an organism with the environment have been revealed. The facts provided in the article are actual, have scientific novelty and practical usefulness.