A. The increase in the weight of four skeletal muscles from post-hatching week 1 (W1) to week 16 (W14). B. The changing rate of skeletal muscle weight to carcass weight from post-hatching week 1 (W1) to week 16 (W14). C. The variation in the weight of the four skeletal muscles in embryo from embryonic day 15 (E15) to day 28 (E28). D. The changing rate of skeletal muscle weight to carcass weight from embryonic day 15 (E15) to day 28 (E28). At each time point (W1, W4, W10, etc), statistically significant differences are indicated by different letters (a, b, c, etc). At a given time point, any samples that are not significantly different are labeled with the same letter.