Modern assessment of breeding value dairy direction
Tendencies in an assessment of breeding value of cattle in recent years are presented. On the example of the TPI index the analysis of the selection signs making it. In 1996 the specific weight of dairy efficiency in an index made 66%, an exterior - 34%. Since 2012 in the TPI index indicators of health and fertility make 28%, an exterior - 26%, and still dominant position is allocated for production - 46%. Changes in approaches to an assessment of indexes of feet and leg composite (FLC), an udder composite (UDC), duration of production life of animal (PL) are shown. Indicators of the transferring ability on an exit of milk fat (PTAF) and protein (PTAP) which made 17% and 21%, respectively are optimized. A selection vector orientation on increase of health of animals emergence in an index of breeding value of an indicator defined livability (LIV), with weight coefficient of 3%. Further selection on decrease in body weight of animals, and also increases of efficiency of use of forages affected increase in an index of conversion of a forage (FE) with 5 to 8%. The orientation of selection process on improvement of health, fertility of cows and increase of economic efficiency of production of milk is noted.