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Muscle fiber type composition of the m. pectoralis major (PM) and m. gastrocnemius (GAS) in Ross 308 and Xueshan chicken.
| Items | Ross 308 |
Xueshan chicken |
||
|---|---|---|---|---|
| PM | GAS | PM | GAS | |
| Fiber diameter (μm) | ||||
| Type I fiber | n.d. | 11.0 ± 0.2 | n.d. | n.d. |
| Type II fiber | 6.6 ± 0.7 | 12.0 ± 0.7 | 6.6 ± 0.5 | 10.6 ± 0.7 |
| Fiber area percentage (%) | ||||
| Type I fiber | n.d. | 17.5 | n.d. | n.d. |
| Type II fiber | 100.0 | 82.5 | 100.0 | 100.0 |
Note: n.d., not detected.
