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Comparison Of Methods Of Estimating Variance Components In Pigs, J. W. Keele, T. E. Long, R. K. Johnson
Comparison Of Methods Of Estimating Variance Components In Pigs, J. W. Keele, T. E. Long, R. K. Johnson
Department of Animal Science: Faculty Publications
Components of variance due to average effects of genes (σ g2), environmental effects common to littermates (σ c2), and environmental effects peculiar to individual pigs (σ e2 )were estimated (ˆ) by the Pseudo Expectation Approach (PE). Data were litter size (LS), backfat (BF; centimeter) and ADG (kilograms/day) collected from the Nebraska Gene Pool swine population between 1967 and 1986. Mean square errors (MSE) for ĥ2 and ĉ2 (ôg2 and ôc2 divided by phenotypic variance) by PE and nested ANOVA and h2 estimated by offspring on parent regression (REGOP) …