THE FEATURES OF EMBRYONIC DEVELOPMENT OF ET CALVES HOLSTEIN BREED
Abstract
Based on research findings it is set that ET calves Holstein’s breeds after the indexes of mean time of period of embryonic development and living mass at birth for certain renounce to the analogues got as a result of artificial insemination of dairy cattle. Thus the coefficient of changeability of living mass of new-born calves is higher and makes Cv=16,5 %. All calves are descendants of three sires: Legend 135404667, Hefti 138550394 and Kepmen 63262902. During the research of duration of embryogenesis and live weight of calves at birth, depending on their origin significant differences were not found.
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