Key result
Postweaning serum IGF-I concentration in Angus beef cattle is moderately to highly heritable (estimate 0.52 ± 0.08) and has small positive genetic correlations with body weight and weight gain.
Population
2,674 purebred Angus calves from a divergent selection experiment
Design
Preclinical
Follow-up
140-d postweaning performance test
Authors
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May guide genetic selection in Angus cattle; leaves open validation across breeds and production settings.
Effect estimate: 0.52 ± 0.08
Postweaning serum IGF-I concentration is moderately to highly heritable in Angus beef cattle and has small positive genetic correlations with body weight and weight gain.
Davis et al. (2006) studied Serum IGF-I concentration and body weight in Angus beef cattle (n=2,674). Divergent selection for serum IGF-I concentration was evaluated on Direct heritability estimates for mean IGF-I concentrations (0.52 ± 0.08). Postweaning serum IGF-I concentration in Angus beef cattle is moderately to highly heritable (estimate 0.52 ± 0.08) and has small positive genetic correlations with body weight and weight gain.
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