TY CONF TI FORMATION OF THE SPECIES AND BREEDING COMPOSITION OF THE GENUS BETULA L. EX SITU IN THE VORONEZH REGION KW bioresource collection KW introduction KW genus Betula KW height growth KW hybridization KW and reproduction systems JO CONTEMPORARY CHALLENGES AND TOPICAL ISSUES OF BIODIVERSITY AND SUSTAINABILITY OF PLANT COMMUNITIES AU Boltnev, I.A. AU Koltunova, L.I. AU Isakov, I.Y. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov