Key result
Chickens with the BB genotype of the IGF I gene had higher body weight at 4 months compared to those with the AA genotype.
Observational (n=810)
The BB genotype of the IGF I gene is associated with higher body weight at 4 months in specific chicken breeds compared to the AA genotype.
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Supports IGF I genotyping for poultry growth selection; leaves open validation across breeds before breeding program adoption.
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Wang et al. (2004) conducted an observational in Growth traits in chickens (n=810). IGF I gene polymorphism (BB genotype) vs. AA genotype was evaluated on Body weight at 4 months (p=<0.05). Chickens with the BB genotype of the IGF I gene had higher body weight at 4 months compared to those with the AA genotype.
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