Myofiber characteristics of two populations for PM and GM on d 1, 7, 28, 49, and 70. (a) Muscle weight, (b) myofiber diameter, (c) myofiber density, FGB = breast of FG, SGB = breast of SG, FGL = leg of FG, SGL = leg of SG, FGP = PM of FG, FGG = GM of FG, SGP = PM of SG, SGG = GM of SG. Means without a common lowercase letter differ significantly (P < 0.05).