Fattening and body composition of CC21 and Duroc pig offspring in a rotational cross

Abstract

One hundred and six castrated male pigs, children of CC21 or Duroc parents from a rotational cross, were fattened with dry feed (18% CP) and honey B in a restricted way in order to study their growth and body composition. Fattening was developed in collective pens mixed the children of both breeds between 116 and 247 days of age. All the carcasses were analyzed. The least squares method was used with a model that took into account the pen and the paternal breed as sources of variation. The means were: initial weight 29.3 kg, final weight 100.3 kg, daily gain 538 g and weight, carcass and meat per day of age 404, 291, and 106 g, respectively. The fat and bone percentages were 33.9, 52.1, and 14.0 respectively. There were significant differences (P <.05) favorable to CC21 in initial weight and in percentage of meat of the valuable cuts. In the rest of the measures, although the differences were not significant, the behavior was higher in the children of CC21. According to the characteristics studied, the CC21 boars can replace the Duroc in the rotational crossing for integral centers.