DEVELOPMENT OF HYBRID GILTS OF ENGLISH AND CUBAN ORIGIN FED A CONCENTRATE AND MOLASSES-B DIET

A total of 163 Camborough (Landrace x Large White, PIC origin), Cuban Landrace x Yorkshire (YL) and Landrace (PIC) x Cuban Yorkshire (EC) gi lts was developed in groups from 100 days of age until an average live weight of 105 kg with a diet df 2 kg of concentrates (16% CP) and mola sses B ad libitum. There were experimental groups with 26 pens of 6 or 7 gilts with a similar proportion per genotype in each pen. The least squares method was used with a model which included the effects of gr oup (3), pen within group and genotype (3). Also, the consumption meas urements with the pen as experimental unit, were analysed. Daily gain was of 721 g with a consumption of 3.05 kg DM/day and a conversion of 4.25 (DM) which indicates the feasibility of using this diet in gilt d evelopment. There were no significant differences between genotypes wh ich could be due to a greater consumption by the YL that can be attrib uted to the competition within the pen. Age at 100 kg and liveweight a t 210 days were: 205, 206 and 205 days and 103, 103 and 103 kg in Camb orough, YL and EC, gilts respectively.