Performance test of young crossbred boars from The Bydgoszcz Breeding Region in Poland.

The aim of presented research was performance test analysis of young crossbred boars came from 6 crossing variants conductedin years 2009 and 2010 in Poland, in The Bydgoszcz Breeding Region. The research covered the performance test resultsof 1911 young crossbred boars conducted with accordance to obligatory modified methodology. The animals came fromthe following crossing variants (sows breed given in the first position): Hampshire x Duroc (H x D), Hampshire x Pietrain (H xP), Duroc x Hampshire (D x H), Duroc x Pietrain (D x P), Pietrain x Hampshire (P x H) and Pietrain x Duroc (P x D). Duroc xHampshire young crossbred boars had the highest growth rate, the thinnest backfat, the highest height of loin eye and the highestselection index value. The highest meat content in 2009 had animals of Pietrain x Duroc and Hampshire x Pietrain, and in2010 Duroc x Hampshire pigs. Analysing the results from years 2009 and 2010 it was obsered that the increase of performancetest selection index value occurred in crossbreds of Hampshire x Duroc, Hampshire x Pietrain and Pietrain x Duroc (by 4, 4and 2 points, respectively). In case of the remaining groups of pigs deterioration (by 1-2 points) of performance test selectionindex has been observed or there was no change.