Estimates of inbreeding depression for serum insulin-like growth factor I concentrations, body weights, and body weight gains in Angus beef cattle divergently selected for serum insulin-like growth factor I concentration.

Abstract excerpt

Data for the current study were obtained from a divergent selection experiment in which the selection criterion was the average serum IGF-I concentration of 3 postweaning blood samples collected from purebred Angus calves. Multiple trait derivative-free REML procedures were used to obtain estimates of inbreeding depression for IGF-I concentration and for BW and BW gains measured from birth to the conclusion of a...

Topics

• Animal Husbandry
• Animals
• Body Weight
• Cattle
• Female
• Genetic Variation
• Inbreeding
• Insulin-Like Growth Factor I
• Least-Squares Analysis
• Male
• Quantitative Trait, Heritable
• Weight Gain