GENETIC VALUE OF RBP PRIMIPAROUS REGISTERED IN 2012-2013 OFFICIAL PRODUCTION CONTROL

V. Maciuc, V. Ujică, C.E. Nistor, V. Băcilă, I. Nistor, S. Olaru

Abstract
    Were analysed the productive performances for 1619 Romanian Black Pied (RBP) primiparous, representing 36.21% from total population belonging to AGCTR from 17 Counties. Except Constanta County, primiparous cows represent a high proportion in the age structure of the farms and have a superior genetic value towards previous generations.
    Average milk production on normal lactation at the analysed batch was of 6992.88 kg milk, with the superior limit of 16095 kg milk and standard deviation s = 1096.88 kg.
    Length of total lactation has a medium value of 350.91 days, gestation period of 286 days and number of insemination for one gestation of 1.07, with limits ranking between 1 and 5 artificial insemination, and age at first calving of 28.4 month.
    Those performances enlighten the superior genetic value of primiparous and the perspectives of accomplishing of some productive indexes at the level of the countries with valuables nucleus of Friesian cows.

Key words: primiparous, productive performances, reproduction indexes, genetic value