Influence of feed quality on fattening and carcass performance of multiple crosses between intensive breeds and endangered local breeds

In a feeding trial at the experimental station Relliehausen of Gottingen University three feed varieties were tested with two genetically different endproducts in fattening-, carcass- and meat quality traits. The feed varieties differed in the lysin content of the grower diet from 0,85% (EM), 1,0% (AM1) and 1,2% (AM3). The endproducts were progeny of the two crossbred sows BHZP-standard (LW/LR) and Ecotype, whose sires were Saddleback or Bentheimer boars both mated to the same PI(NN) and PI x HA(NN) terminal sires. Results can be summarized as follows: In fattening performance the EM-group showed in both endproducts significantly poorer daily gain but feed conversion rate was only in the ecotype progeny significantly poorer. Carcass performance was in all feed quality groups similar but ecotype progeny graded 1% lower in FOM-lean percent. In meat quality the progeny of Hampshire crossbred boars showed the typical RN- effects in pH24, water- and protein contents of loin. Dam breed and feed groups showed little effects only, but the EM-group pigs had significantly better intramuscular fat contents in the loin than the other feed groups.