Table 2.
Physicochemical parameters depending on the rearing system and ageing time (mean ± SD).
| Parameter | F100 | F74 | F35 | Significance | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7 | 14 | Total F100 | 7 | 14 | Total F74 | 7 | 14 | Total F35 | Total 7 | Total 14 | R | A | R*A | |
| Ash (%) | 1.20 ± 0.11 | 1.80 ± 0.90 | 1.50 a ± 0.69 | 1.26 ± 0.17 | 1.10 ± 0.13 | 1.17 b ± 0.17 | 1.15 ± 0.04 | 1.20 ± 0.05 | 1.18 b ± 0.05 | 1.21 ± 0.12 | 1.35 ± 0.58 | 0.011 | - | 0.006 |
| IMF (%) | 5.27 ± 4.82 | 3.67 ± 2.62 | 4.47 a ± 3.86 | 5.19 ± 5.90 | 3.70 ± 2.69 | 4.38 a ± 4.39 | 0.93 ± 0.44 | 1.59 ± 1.18 | 1.26 b ± 0.93 | 3.80 ± 4.72 | 3.03 ± 2.43 | 0.006 | - | - |
| Moisture (%) | 69.80 ± 1.43 | 71.80 ± 2.37 | 70.80 a ± 2.16 | 67.37 ± 4.97 | 65.54 ± 6.65 | 66.37 b ± 5.88 | 72.53 ± 1.96 | 71.79 ± 1.80 | 72.16 a ± 1.87 | 69.90 ± 3.75 | 69.45 ± 5.26 | 0.000 | - | - |
| pH | 5.81 ± 0.24 | 5.58 ± 0.27 | 5.69 a ± 0.28 | 5.58 ± 0.08 | 5.30 ± 0.21 | 5.44 b ± 0.21 | 5.60 ± 0.28 | 5.56 ± 0.31 | 5.58 ab ± 0.29 | 5.66 ± 0.24 | 5.49 ± 0.29 | 0.001 | 0.001 | - |
| Expressible juice (%) | 16.86 ± 5.98 | 20.96 ± 6.28 | 18.91 a ± 6.38 | 17.74 ± 3.65 | 14.13 ± 4.07 | 15.87 b ± 4.23 | 15.94 ± 3.08 | 16.28 ± 2.21 | 16.11 b ± 2.65 | 16.77 ± 4.33 | 17.07 ± 5.13 | 0.015 | - | 0.005 |
| Cooking losses (%) | 17.46 ± 3.48 | 14.31 ± 3.03 | 15.89 ± 3.49 | 20.28 ± 4.09 | 16.03 ± 3.72 | 18.15 ± 4.33 | 17.37 ± 4.09 | 18.07 ± 2.86 | 17.72 ± 3.35 | 18.49 ± 3.91 | 16.13 ± 3.40 | - | 0.094 | - |
| L* | 37.42 ± 3.53 | 38.69 ± 4.49 | 38.05 ± 4.02 | 38.98 ± 3.24 | 41.04 ± 3.46 | 40.05 ± 3.46 | 37.15 ± 9.39 | 40.25 ± 3.01 | 38.70 ± 7.05 | 37.78 ± 6.32 | 40.01 ± 3.71 | - | 0.049 | - |
| a* | 14.99 ± 1.52 | 15.38 ± 2.09 | 15.18 ± 1.81 | 14.25 ± 1.23 | 16.55 ± 2.19 | 15.44 ± 2.11 | 15.24 ± 3.61 | 13.37 ± 2.65 | 14.30 ± 3.26 | 14.86 ± 2.47 | 14.99 ± 2.66 | - | - | 0.004 |
| b* | 13.15 ± 1.34 | 14.75 ± 2.82 | 13.95 ± 2.32 | 13.03 ± 0.83 | 15.99 ± 1.65 | 14.56 ± 1.99 | 13.48 ± 2.42 | 12.88 ± 2.48 | 13.36 ± 2.47 | 13.38 ± 1.75 | 14.44 ± 2.67 | - | 0.007 | 0.001 |
| WBSF (N) | 77.19 ± 45.71 | 37.52 ± 16.83 | 57.36 a ± 39.46 | 42.81 ± 16.86 | 37.64 ± 17.57 | 40.23 b ± 17.10 | 26.64 ± 3.10 | 28.47 ± 6.50 | 27.56 b ± 5.03 | 54.36 ± 37.90 | 35.58 ± 15.61 | 0.000 | 0.012 | 0.005 |
| mg MDA/kg | 0.008 ± 0.006 | 0.011 ± 0.004 | 0.009 b ± 0.005 | 0.020 ± 0.007 | 0.016 ± 0.006 | 0.018 b ± 0.007 | 0.096 ± 0.066 | 0.094 ± 0.072 | 0.095 a ± 0.067 | 0.041 ± 0.054 | 0.039 ± 0.054 | 0.000 | - | - |
a. b. Different letters mean statistically significant differences p < 0.05, according to Tukey’s HSD test. “-”: p-value > 0.05, no statistically significant differences, SD: standard deviation, R: rearing system, A: ageing, IMF: intramuscular fat, MDA: malondialdehyde, WBSF: Warner-Bratzler shear force.