TY JOUR TI HEREDITARY CONDITIONALITY OF PIG LONGEVITY KW gene KW longevity KW boars KW sows KW breed KW correlation KW genotype KW line JO Bulletin Samara State Agricultural Academy AU Uhtverov, A.M. AU Zaitseva, E.S. AU Zaspa, L.F. AU Gritsai, V.V. PY 2018 IS 3 PB Samara State Agrarian University