Received: 02-11-2015 / Accepted: 23-12-2015
The study was conducted to assess reproductive performance, estimate heritabilityandrepeatability and orientate selection for number of pigletsborn alive and number of weaned piglets ofGGP sow herd raised at the nuclear breeding pigs Company Dabaco. The data on pedigree, reproductive performance of the purebreeds Duroc, Landrace and Yorkshirethat included 85, 267 and 321 for sows; 208, 649 and 919 litters, respectively, during the period from 2012 to 2015 were collected and statisticallyanalyzed forestimation of heritability, repeatability and breeding valueprediction. All three pure-bredsposs high level of reproductive performance (Duroc, Landrace and Yorkshire sows had9.33, 10.48 and 10.85 for number of piglet born alive, 9.71; 10.35 and 10.31 for number of weaned piglets, respectively). The heritability and repeatability of these traitswere low (h2= 0.04-0.08; r = 0.05 -0.11) and showed a widerange. Applying BLUP method to predict breeding values for the two traits revealed correlation of breeding value between sows and their offspring. Variation in genetic tendency over the years suggestedthe necessity of selective orientation based on BLUP to improve geneticalgain of two traits for GGP sow herd raised at the Company.