State of Pinus sylvestris L. generative sphere according to cytogenetic analysis in changing climate conditions on the territory of Voronezh oblast

Abstract

A cytogenetic analysis of seed progeny of Pinus sylvestris L. trees growing in Voronezh oblast under different weather conditions (optimal and drought) has been conducted. It is found that in the years of drought the level of mitosis pathologies frequency increased, but it does not exceed norm. The spectrum of pathologies in these years is expanding, but it should be assumed that some of them can contribute to the reallocation of genetic material between chromosomes, which, in turn, will expand the range of norm reaction of an organism, thereby improving its ability to adapt to changing environmental conditions.