Table 4.
Mean values of myofibrillar fragmentation index (MFI); soluble, insoluble, and total collagen; and sarcomere length of breast meat from broilers affected by wooden breast myopathy maturated for up to 7 days.
| MFI | Soluble Collagen (%) | ||||
|---|---|---|---|---|---|
| Severity degree (SD) | |||||
| Normal | 95.65 ± 2.85 B | 0.15 ± 0.01 B | |||
| Moderate | 115.00 ± 2.96 A | 0.20 ± 0.01 A | |||
| Severe | 72.81 ± 2.85 C | 0.19 ± 0.01 A | |||
| Aging period (M) | |||||
| 0 day | 79.32 ± 2.85 B | 0.16 ± 0.01 B | |||
| 3 days | 99.79 ± 2.90 A | 0.17 ± 0.01 AB | |||
| 7 days | 104.35 ± 2.90 A | 0.20 ± 0.01 A | |||
| p-value † | |||||
| (SD) | <0.0001 | 0.0082 | |||
| (M) | <0.0001 | 0.0383 | |||
| (SD × M) | 0.1911 | 0.3790 | |||
| Insoluble collagen (%) | |||||
| Aging period (M) (n = 20) | p-value † | ||||
| SD (n = 20) | 0 day | 3 days | 7 days | ||
| Normal | 0.16 ± 0.02 Ba | 0.22 ± 0.02 Ba | 0.18 ± 0.02 Ba | (SD) | <0.0001 |
| Moderate | 0.26 ± 0.02 Aa | 0.20 ± 0.02 Ba | 0.22 ± 0.02 Ba | (M) | 0.2823 |
| Severe | 0.24 ± 0.02 Aa | 0.31 ± 0.02 Aa | 0.31 ± 0.02 Aa | (SD × M) | 0.0034 |
| Total collagen (%) | |||||
| Aging period (M) (n = 20) | p-value † | ||||
| SD (n = 20) | 0 day | 3 days | 7 days | ||
| Normal | 0.29 ± 0.04 Bb | 0.46 ± 0.04 Aa | 0.33 ± 0.04 Cb | (SD) | 0.0014 |
| Moderate | 0.43 ± 0.04 Aa | 0.37 ± 0.04 Aa | 0.45 ± 0.04 Ba | (M) | 0.0563 |
| Severe | 0.41 ± 0.04 Ab | 0.46 ± 0.04 Aab | 0.56 ± 0.04 Aa | (SD × M) | 0.0052 |
| Sarcomere length (µ) | |||||
| Aging period (M) (n = 20) | p-value † | ||||
| SD (n = 20) | 0 day | 3 days | 7 days | ||
| Normal | 1.49 ± 0.02 Bc | 1.58 ± 0.02 ABa | 1.53 ± 0.02 Bb | (SD) | <0.0001 |
| Moderate | 1.49 ± 0.02 Ba | 1.55 ± 0.02 Ba | 1.57 ± 0.02 Ba | (M) | 0.0560 |
| Severe | 1.68 ± 0.02 Aa | 1.63 ± 0.02 Ab | 1.64 ± 0.02 Aab | (SD × M) | 0.0003 |
† Means followed by different letters in columns (uppercase) and in lines (lowercase) were significantly different through the Tukey test (p < 0.05). “SD”—severity degree, “M”—aging period.