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- W1545632801 abstract "In the present livestock sector artificial breeding schemes for production traits are based on the classical animal model, selecting only on direct genetic effects of individuals. In practice, some traits show a lack of response when selecting for individual performances while group selection yields a positive response (Craig and Muir 1996; Muir 2005). This might be related to social interactions within a group, such as competition. Previous studies have shown that including social genetic effects into breeding value estimates may increase response to selection (Griffing 1967; Muir 2005). Griffing (1967) provides a model that includes both direct and social genetic effects. Application of this model to laying hens by Bijma et al. (2007b) suggested a threefold greater predicted response to selection for survival days than obtained with the classical animal model (Ellen et al. 2008). Also in pigs social genetic effects have been estimated (Arango et al. 2005; Chen et al. 2008). Results of Bergsma et al. (2008) indicated that heritable variation for growth rate and feed intake of pigs in a social interactions model was up to three-fold greater compared to classical estimates. These studies suggest a profound effect of social interactions on production traits. This would imply that performance of individual animals is affected by the behaviour of their group members. By including social genetic effects in breeding value estimates, changes might occur in both production traits and behaviour. However, in practice the consequences of selecting for social effects are unknown in pigs. Therefore, a single generation pilot selection experiment was carried out, where boars were selected based on their estimated Social Breeding Value (SBV) for Average Daily Gain (ADG) during the finishing period. Focus was on the effect of a high versus low paternal SBV on ADG and aggression in offspring groups of finishing pigs." @default.
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- W1545632801 date "2010-01-01" @default.
- W1545632801 modified "2023-09-26" @default.
- W1545632801 title "Consequences Of Selection For Social Genetic Effects On ADG In Finishing Pigs - A Pilot Study" @default.
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