Reproductive performance of 2637 crossbred F1 sows was regressed on the estimated breeding values (EBVs) of their purebred Large White (LW) and Landrace (LR) dams. The resulting regression coefficients for the EBV of the same trait were not significantly different from the expectation of 0.5 for number born alive (LW:0.40; LR:0.44), average birth weight (LW:0.51; LR:0.50) and average weaning weight (LW:0.61; LR:0.35). In contrast, dams' EBVs for number weaned were not good predictors of the differences in performance of their crossbred daughters. The regression of F1 performance on EBVs of dams for average birth and average weaning weight suggested that in LW average birth weight and in LR average weaning weight should be considered for selection to enhance the performance of their crossbred daughters.

M. Suarez, J. A Braun, S. Hermesch, H. U Graser

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 06.25, 2006
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