Fatty Acids
(%) |
June |
July |
September |
Main Effects |
Breed |
Lactation |
Time |
Breed x
Time |
Lacation x Time |
ΣSFAy |
61.42 ± 0.55b |
61.19 ± 0.58b |
64.04 ± 0.47a |
NS |
NS |
0.0055 |
NS |
NS |
C10:0 |
1.72 ± 0.08b |
2.20 ± 0.11a |
2.18 ± 0.11a |
NS |
0.0012 |
0.0129 |
NS |
0.0417 |
C12:0 |
2.68 ± 0.10b |
3.20 ± 3.24a |
3.24 ± 0.08a |
NS |
NS |
0.0013 |
NS |
NS |
C14:0 |
10.35 ± 0.22 |
10.72 ± 0.46 |
11.34 ± 0.13 |
NS |
NS |
NS |
NS |
NS |
C15:0 |
1.25 ± 0.04 |
1.35 ± 0.04 |
1.29 ± 0.03 |
0.0457 |
NS |
0.0317 |
NS |
NS |
C16:0 |
26.90 ± 0.42b |
25.44 ± 0.52b |
29.61 ± 0.39a |
0.0215 |
NS |
0.0001 |
NS |
NS |
C18:0 |
10.72 ± 0.46a |
10.53 ± 0.4a |
8.90 ± 0.29b |
NS |
NS |
0.0455 |
NS |
NS |
C20:0 |
0.69 ± 0.05a |
0.69 ± 0.01a |
0.24 ± 0.06b |
NS |
NS |
<0.0001 |
NS |
NS |
ΣMUFA |
26.39 ± 0.63 |
24.99 ± 0.54 |
24.06 ± 0.42 |
NS |
NS |
NS |
NS |
NS |
C14:1 |
0.98 ± 0.05 |
1.07 ± 0.07 |
1.12 ± 0.07 |
NS |
0.0130 |
NS |
NS |
NS |
C16:1n9 |
0.94 ± 0.05b |
1.11 ± 0.05a |
1.21 ± 0.07a |
NS |
NS |
0.0023 |
NS |
NS |
C18:1n9 |
19.20 ± 0.62 |
17.97 ± 0.53 |
18.54 ± 0.36 |
NS |
0.0455 |
NS |
NS |
0.0433 |
C20:1n9 |
0.40 ± 0.04a |
0.50 ± 0.03a |
0.19 ± 0.01b |
NS |
NS |
<0.0001 |
NS |
NS |
ΣPUFAx |
4.24 ± 0.11 |
4.18 ± 0.11 |
4.44 ± 0.13 |
NS |
NS |
NS |
NS |
NS |
C18:3n3 |
0.25 ± 0.04b |
0.15 ± 0.01b |
0.80 ± 0.06a |
NS |
NS |
<0.0001 |
NS |
NS |
Σn-9 |
20.14 ± 0.63 |
19.08 ± 0.52 |
19.75 ± 0.35 |
NS |
0.0323 |
NS |
NS |
NS |
Σn-6 |
2.39 ± 0.09 |
2.30 ± 0.09 |
2.34 ± 0.09 |
NS |
0.0061 |
NS |
NS |
NS |
Σn-3 |
0.25 ± 0.04b |
0.15 ± 0.01b |
0.80 ± 0.06a |
NS |
NS |
<0.0001 |
NS |
NS |
zMeans ± SEM, n=39. Different superscript letters indicate differences over time by contrasts (p<0.05); NS=not significant; %=g/100 g fatty acids. Only fatty acids<
>0.5% reported. Means for significant main effects of breed and lactation are provided in the text.
yTotal SFA includes estimates for C4:0, C6:0 and C8:0 (3.0%, 2.0% and 1.5%, respectively) as explained in the methods.
xData for vaccenic acid, conjugated linoleic acid and linoleic acid are shown in Figure 1 |
