TY  JOUR
TI  PRODUCTIVE LONGEVITY OF HOLSTEIN COWS DEPENDING ON THE  GENOTYPE OF THE BULL BY KAPPA-CASEIN GENE AND COUNTRY OF ORIGIN
KW  longevity
KW  genotype
KW  bull
KW  gene
KW  Kappa-casein
KW  productive
KW  Holstein
JO  Bulletin Samara State Agricultural Academy
AU  Yudina, O.P.
AU  Usova, T.P.
AU  Sapegina, E.V.
PY  2019
IS  4
PB  Samara State Agrarian University