Fig. 1

Changes in body weights, muscle weights and fibers at different ages of Shouguang chickens. A Changes in body weight with age. B Changes in breast muscle with age. C Muscle fibers of the breast muscle stained with hematoxylin and eosin (H&E) (bar, 100 μm). Different uppercase superscripts in (A) and (B) indicate significant differences in body weight and breast muscle weight at different ages (P < 0.01)