Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 2
Written by Tatiana SHISHKINA, Alexander DARIN, Nikolai KERDYASHOV, Natalia NIKISHOVA
Improving the methods of their evaluation is one of the most important links in breeding programs to increase productivity and fertility of livestock. The genetic improvement of the next generation and the population as a whole depends on the objectivity and accuracy of determining the tribal value of producers. We analyzed the basic principles of selection of bulls-producers, namely the use of producers of higher quality compared to the uterus; maximum use of the best manufacturers; replacement of the previous manufacturer by a manufacturer of even higher quality; regulation of kinship between the producer and the uterus with which he mates. As a result, it was found that when selecting producers for the herd, it is not rational to justify the choice with a high index of lifetime productivity.
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