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Genetic And Phenotypic Parameters Estimated From Nebraska Speci Fic-Pathogen-Free Swine Field Records, P. J. David, R. K. Johnson, T. E. Socha
Genetic And Phenotypic Parameters Estimated From Nebraska Speci Fic-Pathogen-Free Swine Field Records, P. J. David, R. K. Johnson, T. E. Socha
Department of Animal Science: Faculty Publications
Records collected during 1971 through 1979 from 101,606 hogs raised in 18 Nebraska Specific Pathogen Free herds were analyzed. Traits considered were backfat at 100 kg (BF), weight at 140 d of age (WT) and, in some analyses, number of live pigs/litter at birth (NBA). The phenotypic correlation of BF and WT, averaged across herds, was -.07. The correlations between BF and NBA and between WT and NBA were .04 and -.05, respectively. Average phenotypic standard deviations for BF, WT and NBA were 2.6 mm, 8.8 kg and 2.0 pigs. Estimates of the heritability of BF and WT were lower …