Influence of climate change on the manifestation of winter-spring stress factors for apricot in the prikubansky zone of the krasnodar region

The results of analysis of long-term changes in the risk of apricot damage in spring frosts in the Krasnodar region are presented. The phenomenon of changing the ranks of the probability of the manifestation of low-temperature minima in two long-term periods (19852000 and 2001-2017) is revealed. It is shown that the change of ranks from the first to the second period occurs for varieties Krasnoshcheky and Gerdel 1-22 practically the same throughout the research area, which indicates a very weak contribution of ecological differences between geographic points in the phenomenon of genotype-environment interaction. The variety of New Jersey is almost consistently ranked third (the most unstable) in all regions except for Ust-Labinsk in the period 1985-2000. It is shown that apricot varieties differ in frost-resistance homeostasis. Variety Krasnoshcheky in period 1 and period 2 has differences in the probability of manifestation of low-temperature minima 29.7 and 35.3; variety Zherdel 1-22 25.2 and 29.5; and the grade of New Jersey is 25.0 and 41.1. The most homeostatic frost resistance in the Gerdel variety is 1-22.