%0 Journal Article %T Production and growth characteristics of hybrids in the genus Betula: developmental and environmental factors %A Isakov, I.Y. %A Matsneva, M.. %K hybridization, breeding system, silver birch, white birch, polyploidy, heterosis, polymorphism, genotype, cultures %J Forestry Engineering Journal %D 2014 %N 4 %P 4 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov