Genetic group and parity order on productive and reproductive performance of sows

Abstract

The objective of this paper was toevaluate the effect of genetic group (GG) and parity order (PO) of 400 sows on productive and reproductive traits. Were used three GG (GG1, GG2 and GG3) and two PO (PO1 and PO2). The dependent variables evaluated were litter weight at birth (LWB), litter weight at weaning (LWW), litter size at birth (LSB), litter size at weaning (LSW), lactation length (LL), number of litters/female / year (L/F/Y), number of piglets weaned / female / year (P/W/F), daily weight gain of each piglet (DWG), average daily gain of piglets (ADGP), weaning to estrus interval (WEI), average non-productive days (ANP) and number of services per conception (NSPC). The interaction between GG and PO was significant for LWW, LL, L/F/Y, DWG, WEI e ANP. For the other variables (LWB, LSB, LSW and P/W/F) no interaction or effect of GG and PO was observed. There was effect of GG independent of PO in the variables except ADGP and NSPC. The GG 3 was considered superior, since it showed better performance in relation to others in most of characteristics evaluated. It was not possible to determine the best PO, because this varied according to GG and the dependents variables.