Swine
Authors: Kim L. Bunter (University of New England) , Weiguo Cai (Iowa State University) , David J. Johnston (University of New England) , Jack C.M. Dekkers (Iowa State University)
The concentration of IGF-I in blood of young pigs has previously been found to be genetically associated with feed efficiency and performance in pigs. To test these associations, data from the ISU selection line for residual feed intake (RFI) were used. Compared to controls, in the line selected for increased efficiency through reduced RFI, a correlated response in the expected downwards direction was observed for juvenile IGF-I. Genetic correlations of IGF-I were 0.63 with RFI and 0.78 with feed conversion ratio. These results confirm that juvenile IGF-I is a good physiological indicator of genetic merit for economically important efficiency traits, particularly since it is measured early in an animal’s life.
Keywords: ASL R2557
How to Cite: Bunter, K. L. , Cai, W. , Johnston, D. J. & Dekkers, J. C. (2010) “IGF-1 Concentration at a Young Age is Associated with Feed Efficiency in Pigs”, Iowa State University Animal Industry Report. 7(1). doi: https://doi.org/10.31274/ans_air-180814-893