The estimated heritabilities of ADG2 and BF were close to the estimates of 0.36 ± 0.07 for ADG2 and 0.54 ± 0.09 for real-time ultrasonic BF in American Duroc and Landrace pigs (Lo et al., 1992) or estimated values of 0.42 for ADG2 and 0.68 for BF in Yorkshire by Cai et al. (2008).