FIELD: agriculture, selection and genetics in cattle.
SUBSTANCE: it is necessary to detect farming longevity in cattle according to the presence of erythrocytic antigens in their genotype - the markers of animal farming longevity. In cattle the markers of farming longevity are B', I', Q', E, C', and those of nonprolonged farming usage - B2, G2, G3, E2', O', R2, X2, U, U'. Selection in early age and usage of animals that have the markers of longevity in their genotype only or their predominance, or the equation with markers of nonprolonged farming usage enables to prolong farming longevity in animals by 19.4-50.0% and increase the efficiency of milk performance by 17.0-25.2%.
EFFECT: higher efficiency of detection.
1 ex, 2 tbl
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