negligible (Table 2). Although higher daily gain resulted
in better reproductive performance in the first three parities,
lifetime productivity was lower for –1.98 liveborn
piglets per increase of 100 g/day. Animals which grew
100 g/day faster were culled 47 days earlier. Total number
of litters in lifetime (NP) was smaller. However, difference
of growth rate did not result in differences in sow
efficiency (female day per piglet).
Gilts with thicker backfat had smaller litter size in
the first three parities (Table 2), what was in contrast
with findings of Gaughan et al. (1995) and Amaral Filha
et al. (2010). In the 1st parity decrease was –0.072 liveborn
piglets per 1 mm. The decrease was larger in sub