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. 2019 May 16;97(7):3103–3119. doi: 10.1093/jas/skz171

Table 5.

Effects of level and source of fat in the diet of pregnant beef cows during the second and trimesters of gestation on PUFA profiles in subcutaneous adipose tissue of the dam

Treatments1 Contrasts2
LF CAN FLX SEM LF vs. HF CAN vs. FLX
Fatty acid, % of total)3 (n = 10) (n = 10) (n = 10)
Start of trial
 ∑PUFA 1.29 1.29 1.14 0.08 0.16 0.04
 ∑n-3 0.50 0.49 0.44 0.07 0.39 0.16
 18:3n-3 0.44 0.43 0.39 0.06 0.37 0.34
 22:5n-3 0.04 0.04 0.03 0.01 0.81 0.07
 ∑n-6 0.80 0.79 0.70 0.04 0.26 0.09
 18:2n-6 0.73 0.72 0.63 0.04 0.19 0.08
 20:4n-6 0.03 0.03 0.03 0.01 0.87 0.93
 ∑CLnA 0.06 0.08 0.06 0.01 0.16 0.16
 c9,t11,t15-18:3 0.05 0.06 0.05 0.01 0.29 0.45
 c9,t11,c15-18:3 0.01 0.02 0.01 0.00 0.21 0.07
 ∑CLA 0.94 0.99 0.89 0.16 0.99 0.46
 c9,t11- + t7,c9-18:2 0.84 0.88 0.79 0.15 0.91 0.47
 t11,c13-18:2 0.04 0.04 0.04 0.01 0.63 0.78
 t,t-CLA 0.06 0.06 0.06 0.01 0.64 0.23
 ∑AD 0.55 0.61 0.55 0.09 0.76 0.52
 c9,t14- + c9,t13-18:2 0.21 0.24 0.20 0.05 0.84 0.40
 c9,t15-18:2 0.07 0.09 0.07 0.03 0.68 0.30
 t11,c15-18:2 0.22 0.23 0.23 0.03 0.82 0.91
End of trial
 ∑PUFA 1.58 1.76 2.23 0.63 0.09 <0.10
 ∑n-3 0.38 0.37 0.58 0.03 0.01 <0.01
 18:3n-3 0.33 0.32 0.52 0.02 <0.01 <0.01
 22:5n-3 0.05 0.05 0.06 0.01 0.35 0.13
 ∑n-6 1.20 1.39 1.65 0.60 0.13 0.28
 18:2n-6 1.10 1.29 1.53 0.56 0.11 0.26
 20:4n-6 0.05 0.07 0.08 0.04 0.68 0.69
 ∑CLnA 0.05 0.05 0.12 0.02 <0.01 <0.01
 c9,t11,t15-18:3 0.03 0.03 0.06 0.01 <0.01 <0.01
 c9,t11,c15-18:3 0.02 0.02 0.06 0.01 <0.01 <0.01
 ∑CLA 0.70 0.88 1.05 0.22 <0.01 0.09
 c9,t11- + t7,c9-18:2 0.63 0.80 0.92 0.19 <0.01 0.20
 t11,c13-18:2 0.03 0.03 0.07 0.01 0.01 <0.01
 t,t-CLA 0.04 0.05 0.07 0.02 <0.01 0.01
 ∑AD 0.40 0.57 0.90 0.22 <0.01 <0.01
 c9,t14- + c9,t13-18:2 0.16 0.25 0.34 0.08 <0.01 0.05
 c9,t15-18:2 0.08 0.11 0.15 0.04 <0.01 <0.01
 t11,c15-18:2 0.12 0.12 0.32 0.08 <0.01 <0.01

1LF = low-fat diet; CAN = high-fat diet including canola seed-based pelleted feed; FLX = high-fat diet including flaxseed-based pelleted feed.

2HF = average of CAN and FLX.

3 c = cis; t = trans; ΣPUFA = sum of polyunsaturated fatty acids (Σn-6 + Σn-3); Σn-3 = sum of n-3 fatty acids; Σn-6 = sum of n-6 fatty acids; ΣCLnA = sum of conjugated linolenic acids; ΣAD = sum of atypical dienes; ΣCLA = sum of conjugated linoleic acids.