Genetic parameters for piglet weight were estimated using DFREML procedure in two strains of Iberian pigs and in records proceeding from a 4 x 4 diallelic design between ancient strains. The model of analysis included four random effects: direct and maternal genetic effects, common environmental effect and residual, and as fixed effects the sex, the farrowing period and the parity of the dam. Inbreeding coefficients of dam and piglet and the parameters of the Eisen et al. (1983) model were also included as covariables in the analysis of strains and of the diallel cross, respectively.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 17. Genetics and breeding of dairy and beef cattle, swine and horses, , 355–358, 1994
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