A Bayesian procedure, which allows considering the individual variation in the feed resource allocation pattern, is described and implemented in two sire lines of rabbit (C and R). The procedure is based on the hierarchical scheme of Wakefield where the first stage of the model is constituted by a multiple regression model of food intake on metabolic body weight and on body weight gain and, the second stage by an animal model including batch, parity order, litter size and common environmental litter effects. Posterior means (PSD) for heritabilities for partial coefficients of regression of food intake on metabolic body weight and on body weight gain were estimated to be 0.43 (0.03) and 0.46 (0.04) respectively in C line and 0.45 (0.03) and 0.46 (0.04) respectively in R line. Posterior mean of the genetic and phenotypic correlation between both parameters was negligible in both lines. Results suggest that efficiency for the use of food resources could be improved including these coefficients in an index of selection.

Luis Varona

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 14.03, 2006
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