REPRODUCTIVE PERFORMANCE OF THE BEEF COWS OBTAINED FROM THE SIRES OF VARIOUS CONFORMATION TYPES
Journal Title: Науковий вісник Національного університету біоресурсів і природокористування України. Серія : Технологія виробництва і переробки продукції тваринництва - Year 2017, Vol 1, Issue 271
Abstract
Reproductive performance of beef cows belong to the main selection traits. Improvement of reproductive performance through selection of sires of a certain conformation type (relatively tall or compact). Thus, efficient ways of utilization of the sires of various conformation types for the purpose of daughters’ fertility have been studied. Conformation types of sires(relatively tall or compact) were measured by the model deviation of the index of body height (IBH). It has been proved that heifers obtained from the sires of the tall type had higher age at first calving by 4,7 % and shorter duration of life by 10,3 %, poorer longevity by 78,5 %, lower amount of born and weaned calves - by 16,0 and 18,8 %, and lower survival rate – by 1,7 points.
Authors and Affiliations
A. M. Ugnivenko
Keywords
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