Discipline: Animal Science
The comparative productive performance of three genetic-groups of pigsthe backcrosses of Landrace (LD) and Large White (LW) crossbreds (LDLWLD and LWLDLW) and the four-breed crossed pigs from LD x LW sows and Duroc x Pietrain boars (LDLWDP) was documented using 74 pigs with unequal number of pigs in each group. This study covered the period from 41-100 days after birth. Variables analyzed following the 3 x 2 factorial experiment in a completely randomized design (CRD) were weights at 40, 70 and 100 days old, corresponding weight gain, average daily gain, feed consumption and feed efficiency. Interaction between the genetic group and sex was only significant on feed consumption from 41-70 days old. Variations due to the genetic group on 70-day weight, weight gain and average daily gain of pigs from 41-70 days old were significant. From 71-100 days old, variations on the same traits and the feed consumption were also significant. At this stage, LDLWLD and LWLDLW pigs had higher mean 100-day weight, weight gain and average daily gain than LDLWDP pigs. Sex did not affect the traits from 41-70 days and 71-100 days old. These results indicated that the backcrosses performed better than the four-breed crossed pigs and the LDLWLD pigs had the least feed consumption and were the most efficient.