Direct response to selection for post-weaning net feed intake in mice and correlated responses in post-weaning growth, intake, gross digestibility and body composition
T. E. Hughes and W. S. Pitchford
Australian Journal of Experimental Agriculture
44(5) 489 - 500
Published: 04 June 2004
Seven generations of divergent selection on a phenotypic index of net feed in mice produced a realised heritability estimate of 0.27 ± 0.07. Despite small negative genetic correlations of net feed intake with daily gain and liveweight, correlated responses in these economically important traits were negligible. Still, more efficient animals tended to be fatter during the early post-weaning phase. Gross digestibility was also affected, which may have implications for the overall energy balance of a biological system. Keywords: feed efficiency, growth, lactation, mouse, residual feed intake.
Full text doi:10.1071/EA02112
© CSIRO 2004