Генеалогическая структура татарстанской популяции черно-пестрого скота по принадлежности к перспективным ветвям

Abstract

A study was made of the genealogical structure of black-and-white cattle, taking into account new promising branches in the breeding herds of KrasnyVostok Agro JSC.The data of 14554 heads of breeding cows, which originated from 217 Holstein bulls, were studied. It has been established that the herd has eight promising branches from three lines, while the largest share in the population of dairy cattle is given to the branches of HANOVERHILLSTARBUCK 352790 (28.3%), ROCKALLI SON OF BOVA 1665634 (20.5%) from the line of Vis BekIdial and WALKWAY CHIEF MARK 1773417 (16.5%) from the line Reflection Sovering. A small group of cattle comes from the branch S-W-D VALIANT 1650414 (1.2%). The animals of the TO-MAR BLACKSTAR-ET branch with a milk yield of 13059 kg, the mass fraction of fat in milk – 4.21% and the mass fraction of – 3.29% are characterized by a high bull parent index of the bull and branch WALKWAY CHIEF MARK (12213 kg – 4.28% – 3.25%). Animals of the R. Sovering line with the best genetic potential for milk yield are not observed to have a sufficiently high degree of its implementation.Thus, all lines have a low realization of the genetic potential of milk yield, which is primarily associated with a large number of young cows in the herd and a low age at calving.