A method for determining and predicting the breeding value of the bulls on the lifetime milk production of their daughters with polyfactorial selection indexes

摘要

A method of determining and predicting breeding value bulls lifetime milk yield their daughters in breeding dairy cattle using perennial-productive selection index (DPSI) includes a predicted standard transmit bovine ability for milk yield its daughters in the first lactation (milk production in kilograms; milk fat yield and milk protein, kg), the predicted transmission standard bovine ability in terms of preservation of its daughters before the completion of the second and third lactation in percents Hmax of the number of daughters occurred first lactation and projected standard transmit bovine ability of factor reproductive capacity of its daughters between first and second calving, characterized in that it includes weighting factors that are calculated in proportion to the magnitude of the correlation coefficients prediktnyh signs with the final feature lifetime productivity, as well as transmitting predicted standard bovine ability Ratios preservation its daughters before completion of the second and third lactation, and asschityvaetsya of formula somewhere arithmetic mean of the group of feature daughters bull; - the arithmetic average of feature sample or population; σ- standard deviation on the basis of respective sample or population.