Figure 2.

The muscle fiber type composition of different muscular tissues from slow- and fast-growing broilers. (A) Immunohistochemical analyses for four muscular tissues using antifast and antislow myosin skeletal heavy chain. Red arrows point to examples of fibers with positive immunostaining for glycolytic fibers; Green arrows point to examples of fibers with positive immunostaining for oxidative fibers. Magnification of 200 × was used (Bar = 100 μm). (B) The muscle fiber diameter and cross-sectional area of glycolytic fibers and oxidative fibers in four muscular tissues of two breeds. (C) The muscle fiber type composition in four muscular tissues of two breeds. Abbreviations: BM, breast muscle; EDL, extensor digitorum longus muscle; GAS, gastrocnemius muscle; SOL, soleus muscle.