TY JOUR TI Selective background for forming the source alfalfa material with high adaptive and symbiotic abilities KW vegetative experiments KW selective background KW alfalfa KW alfalfa-rhizobial symbiosis KW adaptive capacity JO Adaptive Fodder Production AU Stepanova, G.V. AU Ionov, A.A. PY 2026 IS 2026 PB Federal Williams Research Center of Forage Production and Agroecology