Table 5.
Fatty acid composition (% of total fatty acids) and nutritional indices in breast muscle of slow-growing broiler chickens injected in ovo with GOS in response to heat stress.
| Treatment (Tr)1 |
Temperature (T)2 |
SEM | Significance |
|||||
|---|---|---|---|---|---|---|---|---|
| C | GOS | TN | HS | Tr | T | TrxT | ||
| Fatty acids3 | ||||||||
| C14:0 | 0.39 | 0.36 | 0.34 | 0.40 | 0.02 | NS | NS | NS |
| C14:1 | 0.06 | 0.05 | 0.06 | 0.05 | 0.01 | NS | NS | NS |
| C15:0 | 0.08 | 0.07 | 0.07 | 0.07 | 0.01 | NS | NS | NS |
| C16:0 | 27.14 | 26.89 | 27.432 | 26.60 | 0.30 | NS | NS | NS |
| C16:1 | 1.93 | 1.90 | 2.04 | 1.91 | 0.08 | NS | NS | NS |
| C17:0 | 0.17 | 0.16 | 0.15 | 0.18 | 0.01 | NS | NS | NS |
| C18:0 | 8.65 | 7.76 | 7.11 | 9.30 | 0.47 | NS | * | NS |
| C18:1 n-9 | 25.11 | 24.92 | 26.38 | 23.65 | 0.54 | NS | * | NS |
| C18:2 n-6 | 23.93 | 23.78 | 23.24 | 24.48 | 0.27 | NS | * | ** |
| C18:3 n-6 | 0.13 | 0.12 | 0.13 | 0.12 | 0.00 | NS | NS | NS |
| C18:3 n-3 | 1.22 | 1.13 | 1.18 | 1.17 | 0.04 | NS | NS | NS |
| C20:0 | 0.11 | 0.11 | 0.10 | 0.11 | 0.01 | NS | NS | NS |
| C20:1 | 0.20 | 0.20 | 0.21 | 0.19 | 0.00 | NS | NS | NS |
| C20:2n-6 | 0.64 | 0.68 | 0.62 | 0.69 | 0.03 | NS | NS | NS |
| C20:3 n-6 | 0.92 | 1.00 | 0.94 | 0.98 | 0.03 | NS | NS | * |
| C20:3 n-3 | 0.09 | 0.11 | 0.08 | 0.12 | 0.01 | NS | NS | NS |
| C20:4 n-6 | 7.29 | 7.71 | 7.58 | 7.42 | 0.25 | NS | NS | NS |
| C20:5 n-3 | 0.29 | 0.32 | 0.32 | 0.29 | 0.02 | NS | NS | NS |
| C22:0 | 0.16 | 0.17 | 0.16 | 0.16 | 0.01 | NS | NS | NS |
| C22:1 | 0.02 | 0.03 | 0.02 | 0.04 | 0.01 | NS | * | NS |
| C22:2n-6 | 0.05 | 0.03 | 0.03 | 0.05 | 0.01 | NS | NS | NS |
| C22:4n-6 | 0.41 | 0.47 | 0.43 | 0.45 | 0.02 | NS | NS | NS |
| C22:5 n-3 | 1.01 | 1.14 | 1.08 | 1.07 | 0.04 | NS | NS | * |
| C22:6 n-3 | 0.69 | 0.77 | 0.74 | 0.72 | 0.03 | NS | NS | NS |
| C24:0 | 0.07 | 0.06 | 0.05 | 0.08 | 0.02 | NS | NS | NS |
| ƩSFA | 36.76 | 35.57 | 35.42 | 36.90 | 0.53 | NS | NS | NS |
| ƩMUFA | 27.31 | 27.10 | 28.70 | 25.72 | 0.60 | NS | * | NS |
| ƩPUFA | 36.67 | 37.25 | 36.37 | 37.56 | 0.40 | NS | NS | NS |
| Ʃn-6 | 33.37 | 33.78 | 32.96 | 34.19 | 0.36 | NS | NS | * |
| Ʃn-3 | 3.94 | 4.15 | 4.03 | 4.06 | 0.08 | NS | NS | NS |
| Nutritional indices4 | ||||||||
| n-6/n-3 | 8.53 | 8.22 | 8.31 | 8.45 | 0.11 | NS | NS | *** |
| P/S | 1.01 | 1.05 | 1.03 | 1.03 | 0.02 | NS | NS | NS |
| AI | 0.44 | 0.44 | 0.44 | 0.44 | 0.01 | NS | NS | NS |
| TI | 0.86 | 0.82 | 0.81 | 0.86 | 0.02 | NS | NS | NS |
1
C = Control (untreated); GOS = in ovo injected with GOS.
2
TN = thermoneutral conditions; HS = heat stress conditions (on d 36–50).
3
SFA = saturated fatty acids; MUFA = monounsaturated fatty acids; PUFA = polyunsaturated fatty acids.
4
Abbreviations: P/S, PUFA/SFA ratio; AI, atherogenic index; TI, thrombogenic index. Significance: NS = P > 0.05; * P < 0.05; ** P < 0.01; *** P < 0.001.