Genetic parameter estimates for serum insulin-like growth factor-I concentration and carcass traits in Angus beef cattle.

Abstract excerpt

Divergent selection for serum insulin-like growth factor-I (IGF-I) concentration began at the Eastern Ohio Resource Development Center (EORDC) in 1989 using 100 spring-calving (50 high line and 50 low line) and 100 fall-calving (50 high line and 50 low line) purebred Angus cows. Following weaning, bull and heifer calves were fed in drylot for a 140-d postweaning period. At the conclusion of the postweaning test,...

Topics

• Animals
• Breeding
• Cattle
• Environment
• Female
• Genomic Imprinting
• Genotype
• Insulin-Like Growth Factor I
• Male
• Meat
• Phenotype