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Table 10 Fatty acid classes, ratios, indexes and enzyme activity in meat of longissimus thoracis muscle of Morada Nova lambs of different sexes subjected to feed restriction

From: Effects of quantitative feed restriction and sex on carcass traits, meat quality and meat lipid profile of Morada Nova lambs

Index, mg/100 g of meat Sexes Feed restrictions SEM P-value
Ent Cas Fem AL 30% 60% Sex Res Sex × Res
ΣSFA 1731 1837 1853 1988a 2007a 1425b 50.12 0.579 <.0001 0.770
ΣUFA 1707 1896 1748 2131a 2069a 1151b 44.52 0.210 <.0001 0.602
ΣMUFA 1578 1741 1585 1981a 1926a 997b 44.10 0.248 <.0001 0.569
ΣPUFA 129b 155ab 163a 150 142 154 4.222 0.008 0.504 0.716
Σω6 99.0b 120a 131a 116 110 124 3.338 0.003 0.212 0.777
Σω3 26.10 30.3 28.8 29.9 27.9 27.4 0.909 0.188 0.515 0.628
ω6/ω3 3.84b 3.99b 4.53a 3.90b 3.96b 4.50a 0.076 0.003 0.009 0.784
h/H 1.60ab 1.77a 1.54b 1.74a 1.65ab 1.52b 0.027 0.008 0.015 0.661
DFA 2328 2583 2397 2826a 2769a 1713b 56.65 0.185 <.0001 0.661
TI 1.78 1.70 1.81 1.64b 1.72b 1.93a 0.031 0.351 0.003 0.741
AI 0.75b 0.72b 0.84a 0.70b 0.74b 0.87a 0.016 0.020 <.0001 0.706
Δ9 desaturase C16 4.26 4.17 4.28 4.36 4.28 4.07 0.124 0.925 0.631 0.872
Δ9 desaturase C18 69.8 69.0 67.9 72.6a 72.1a 61.9b 0.556 0.428 <.0001 0.431
Elongase 68.9b 70.9a 67.4b 69.6 69.1 68.4 0.273 <.0001 0.240 0.179
  1. Ent Entire males, Cas Castrated males, Fem Females, AL ad libitum intake, 30% 30% feed restriction, 60% 60% feed restriction, SEM standard error of the mean, Sex sexes and Res = feed restriction
  2. SFA saturated fatty acids (ΣC10:0, C12:0, C14:0, C15:0, C16:0, C17:0, C18:0, C22:0); UFA unsaturated fatty acid (ΣC14:1c9, C16:1c9, C17:1c9, C18:1c9, C18:1 t9, C18:2c9c12, C18:2t9t12, C18:2c9t11, C18:3c6c9c12, C20:4c5c8c11c14, C20:5c5c8c11c14c17), MUFA monounsaturated fatty acid (ΣC14:1c9, C16:1c9, C17:1c9, C18:1c9, C18:1 t9), PUFA polyunsaturated fatty acid (ΣC18:2c9c12, C18:2t9t12, C18:2c9t11, C18:3c6c9c12, C20:4c5c8c11c14, C20:5c5c8c11c14c17), ω6 (ΣC18:2c9c12, C18:2t9t12, C20:4c5c8c11c14), ω3 (C18:3c9c12c15, C20:5c5c8c11c14c17), ω6:ω3 relation (Σω6/Σω3), h/H hypocholesterolemic hypercholesterolemic relation (ΣC18:1c9, C18:2c9c12, C18:3c6c9c12, C20:4c5c8c11c14, C20:5c5c8c11c14c17 / ΣC14:0, C16:0), DFA Desirable fatty acids (ΣMUFA, PUFA, C18:0), TI Thrombogenicity index [(ΣC14:0, C16:0, C18:0) / Σ(0,5xΣMUFA), (0,5xΣω6), (3xΣω3), (Σω3/Σω6)], AI Atherogenicity index {[ΣC12:0,(4xC14:0), C16:0] / [(Σω3,ω6) + (C18:1c9) + (Σ other MUFA)]}; Enzyme activity Δ9 desaturase on fatty acid with 16 carbons {100[(C16:1c1) / (ΣC16:1c1, C16:0)]}; Enzyme activity Δ9 desaturase on fatty acid with 18 carbons {100[(C18:1c1) / (ΣC18:1c1, C18:0)]}; Elongase activity enzyme {100[(ΣC18:0,C18:1c9) / (ΣC16:0,C16:1c9,C18:0,C18:1c9)]}
  3. a b Means followed by different letters differ between sexes according to a Tukey-Kramer test (P < 0.05)
  4. a b Means followed by different letters differ between feed restrictions according to a Tukey-Kramer test (P < 0.05)