%0 Journal Article %T GENE OF SOMATOTROPIN CASCADE POLYMORPHISMS, ASSOCIATED WITH BEEF PRODUCTIVITY OF KAZAKH WHITE-HEADED BREED COWS %A Beishova, I.S. %K genes, polymorphism, marker, cascade, productivity, breed, somatotropic, beef %J Bulletin Samara State Agricultural Academy %D 2018 %N 3 %P 4 %I Samara State Agrarian University