Table 3.
Muscle fiber morphology traits in m. pectoralis major (PM) and m. gastrocnemius (GAS) from Ross 308 and Xueshan chicks.
| Items | Fiber diameter1 | Fiber cross-sectional area2 | Fiber density3 |
|---|---|---|---|
| Ross 308 broiler | |||
| PM | 6.56 ± 0.15 | 29.44 ± 4.65 | 34.95 ± 6.21 |
| GAS | 11.19 ± 0.64 | 108.59 ± 25.66 | 9.68 ± 1.99 |
| Xueshan chicken | |||
| PM | 6.55 ± 0.49 | 21.72 ± 1.77 | 46.34 ± 3.68 |
| GAS | 10.59 ± 0.65 | 132.86 ± 5.79 | 7.54 ± 0.32 |
| Breeds | |||
| Ross 308 broiler | 8.88 ± 2.42 | 69.01 ± 43.66 | 22.31 ± 13.45 |
| Xueshan chicken | 8.57 ± 2.10 | 77.29 ± 55.73 | 26.94 ± 19.57 |
| Muscular tissues | |||
| PM | 6.56 ± 0.63b | 25.58 ± 5.22b | 40.65 ± 7.65a |
| GAS | 10.89 ± 0.71a | 120.73 ± 22.21a | 8.61 ± 1.78b |
| P-value (Two-Way ANOVA) | |||
| Breeds | 0.187 | 0.407 | 0.034 |
| Muscular tissues | 0.000 | 0.000 | 0.000 |
| Breeds ×* Muscular tissues | 0.197 | 0.130 | 0.119 |
Results are reported as means ± SE (n = 6).
a,b
Superscripted letters within a row indicate significant differences (P < 0.05).
1
Unit of muscle fiber diameter: μm;
2
Unit of muscle fiber cross-sectional area: μm2.
3
Definition of muscle fiber density: fiber number/mm2, × 103.