Sow productivity of market hog and landrace x large white (F1) crossbred in a crossbreeding system

Professorial Chair Lecture

Central Bank Professorial Chair Lecture

Place

Animal Science Lecture Hall, Animal and Dairy Sciences Cluster, College of Agriculture, UPLB, College, Laguna

Date

10-26-2007

Abstract

A total of 129 sows composed of 61 Landrace x Large White (F1) crossbreds and 68 Market Hog Breeders with 4 parities each and a total of 516 parities were used in this study conducted at a 1,800-sowlevel farm in the Mindanao Region of the Philippines to evaluate and compare the performance of the two genotypes as dams in the production of hogs for slaughter. The F1 crossbreds were the progenies of the grand parental stocks (GPs) of purebred Landrace and purebred Large White without regard to which breed was used as the sire or the dam. These crossbreds were also called parental stocks (PS). On the other hand, Market Hog Breeders are the female progenies of the F1 crossbreds mated to hybrid boars. These were the finisher pigs that were intended for slaughter. The two genotypes were bred with hybrid sires. Data on litter size at birth, litter size at weaning, pig weight at birth and pig weight at weaning from parity 1 to parity 4 of two genotypes were analyzed using analysis of variance with genotype, parity and genotype within parity and error as sources of variation. Litter size at bright and wearing and pig weight at birth and pig weight at weaning from parity 1 to parity 4 of two genotypes were analysis of variance with genotype, parity and genotype within parity and error as sources of variation. Litter size at birth and weaning and pig weight at birth and weaning were the dependent variables.

Litter size at birth was not significantly affected by genotype but litter size at weaning was (P<0.001). F1 Crossbred weaned 9.22 pigs per litter while Market Hog Breeder had only weaned 8.58 pigs per litter. Litter size at birth and litter size at weaning were significantly affected by parity. Litter size at birthday 2 was significantly larger than those in parities 1 and 3 (P<0.05) and parity 4 (P<0.08). Litter size at weaning in parity 2 was significantly larger (P<0.05) than those in parities 1 and 3. Litter size at weaning in parity was significantly larger (P>0.05) than those in parities 1 and 3. Litter size at birth was not significantly affected by genotype within parity. Difference in litter size at weaning between the 2 genotypes was not significant in parity 1. However, litter size at weaning was significantly affected by genotype in parities 2, 3, and 4.

Birth weight (1.56 kg) of pigs born to F1 Crossbred was significantly heavier (P<0.02) than that of the Market Hog Breeder (1.52). F1 Crossbred also weaned heavier (P<0.001) pigs than Market Hog Breeder did. Differences in birth weights as well as in weaning weights among parities were not statistically significant. The F1 Crossbred and Market Hog Breeder in parity 3 (P<0.03) at weaning than pigs of the Market Hog Breeder in parities 1 and 2 but in parities 3 and 4 the pigs of the 2 genotypes had statistically the same weaning weights.

Location

UPLB Main Library Special Collections Section (USCS)

College

College of Agriculture and Food Science (CAFS)

Language

English

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