TY JOUR TI Intraspecific crosses of selected biotypes of the Ulmus and Populus genera to obtain heterotic breeding forms KW selection KW heterosis KW poplar KW elm KW crossing KW hybridization JO Agrarian Bulletin of the AU Kryuchkov, S.N. AU Solomenceva, A.S. AU Romanenko, A.K. PY 2023 IS 235 PB Ural State Agrarian University