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.

N. H Park, O. Y Shin, K. K Jeung, C. B Choi

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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