TY JOUR TI COMMUNICATION SYSTEMS OF TOPOLS IN COMMUNICATION WITH SYSTEMS OF THEIR REPRODUCTION KW systems of selection and reproduction of poplar KW a model object of genetic selection research JO Actual directions of scientific researches of the XXI century: theory and practice AU Sivolapov, A.I. AU Sivolapov, V.A. PY 2020 IS 8 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov