The generally positive correlation between circulating IGF-I concentrations at early ages and performance traits indicates that IGF-I may serve as a useful indicator of growth capacity in beef cattle. Serum IGF-I concentration might be used as a component of selection indices, along with other physiological predictors of performance and performance traits, to improve efficiency of beef production.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 19. Selection and quantitative genetics; growth; reproduction; lactation; fish; fiber; meat., , 209–211, 1994
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