Duroc as a terminal sire line for fattening pigs production.

Aim of this paper is to show productive results of fattening pigs obtained from crosses of Duroc sires, and F1 sows which are obtained from mating of Landrace and Yorkshire. Investigation is conducted on one commercial farm in which production undergoing trough all technological phases, from piglets production on the beginning till the final product which is fattening pigs. Growth traits were investigated on 3093 piglets which were divided in seven facilities. In lactation period of 26 days, gained body weight was 7.36 kg. In growing period which lasted 58 days, crosses obtained from Duroc sires have achieved daily weight gain of 0.50 kg and average body mass of 29 kg. In fattening period which lasted 85 days, average daily gain was 0.83 kg with achieved body mass of 70.89 kg. At the end of fattening period, fatlings have achieved final body mass of 107.30 kg in period of 159 day in total, with 59.70% of meat in carcass. Total feed consumption per fatlings was 192 kg. Total losses in fattening period were 5% (2.8% mortality and 2.2% economic slaughters). This high level of productive performance, combined with the high meat percentage in carcass of fattening pigs, lids to a conclusion which explain the popularity of the Duroc breed as a sire line in many countries.