Social genetic effects for growth in pigs differ between boars and gilts

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  • Hanne M. Nielsen, Breeding and Genetics, Pig Research Centre, Danish Agriculture & Food Council, Danmark
  • Birgitte Ask, Breeding and Genetics, Pig Research Centre, Danish Agriculture & Food Council, Danmark
  • Per Madsen
Average daily gain (ADG) in pigs is affected by the so-called social (or indirect) genetic effects (SGE). However, SGE may differ between sexes because boars grow faster than gilts and their social behaviours differ. We hypothesized that direct genetic effects (DGE) and SGE for ADG in pigs differ between boars and gilts and that accounting for these differences will improve the predictive ability of a social genetic effects model (SGM). Our data consisted of ADG from 30 to 94 kg for 32,212 uncastrated males (boars) and 48,252 gilts that were raised in sex-specific pens. Data were analyzed using a univariate model with sex as a fixed effect and a bivariate model with ADG in boars and gilts as separate traits using both a classical animal model (CM) and a SGM.
OriginalsprogEngelsk
Artikelnummer4
TidsskriftGenetics Selection Evolution
Vol/bind50
Antal sider10
ISSN0999-193X
DOI
StatusUdgivet - 1 feb. 2018

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