Table 4. Contenta (g/kg milk) of odd and branched-chain fatty acids (OBCFA) in milk from three breeds of dairy cow over four time points; 5 days in milk (DIM), 95 DIM, 185 DIM, 275 DIM.
Time Point | P Value | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
5 DIM | 95 DIM | 185 DIM | 275 DIM | SE | ||||||||||||
Fatty acid | HO | JE | CB | HO | JE | CB | HO | JE | CB | HO | JE | CB | Bf | Tg | B x Th | |
5:0 | 0.02 | 0.01 | 0.01 | 0.02 | 0.01 | 0.02 | 0.03 | 0.04 | 0.03 | 0.02 | 0.03 | 0.02 | 0.00 | NS | *** | * |
7:0 | 0.01 | 0.00 | 0.01 | 0.01 | 0.02 | 0.02 | 0.01 | 0.02 | 0.01 | 0.01 | 0.02 | 0.01 | 0.00 | NS | *** | * |
9:0 | 0.01 | 0.00 | 0.01 | 0.02 | 0.02 | 0.02 | 0.02 | 0.03 | 0.02 | 0.02 | 0.02 | 0.01 | 0.00 | * | *** | NS |
11:0 | 0.03 | 0.02 | 0.03 | 0.09 | 0.12 | 0.10 | 0.11 | 0.16 | 0.12 | 0.12 | 0.17 | 0.13 | 0.01 | *** | *** | ** |
13:0 | 0.03 | 0.02 | 0.02 | 0.08 | 0.11 | 0.09 | 0.09 | 0.13 | 0.09 | 0.09 | 0.13 | 0.10 | 0.01 | ** | *** | ** |
iso-13:0 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.02 | 0.02 | 0.00 | NS | *** | NS |
anteiso-13:0 | 0.01 | 0.01 | 0.01 | 0.02 | 0.04 | 0.03 | 0.04 | 0.05 | 0.04 | 0.04 | 0.06 | 0.05 | 0.00 | ** | *** | * |
iso-14:0 | 0.03 | 0.03 | 0.03 | 0.03 | 0.06 | 0.05 | 0.04 | 0.07 | 0.05 | 0.06 | 0.08 | 0.07 | 0.00 | *** | *** | *** |
15:0 | 0.32 | 0.25 | 0.28 | 0.52 | 0.59 | 0.52 | 0.52 | 0.68 | 0.50 | 0.53 | 0.72 | 0.53 | 0.03 | ** | *** | ** |
iso-15:0 | 0.09 | 0.07 | 0.07 | 0.08 | 0.09 | 0.08 | 0.08 | 0.10 | 0.08 | 0.10 | 0.13 | 0.10 | 0.00 | ** | *** | *** |
anteiso-15:0 | 0.13 | 0.11 | 0.12 | 0.18 | 0.18 | 0.17 | 0.18 | 0.21 | 0.17 | 0.20 | 0.25 | 0.21 | 0.00 | ƚ | *** | ** |
iso-16:0 | 0.11 | 0.09 | 0.09 | 0.08 | 0.13 | 0.10 | 0.11 | 0.18 | 0.11 | 0.14 | 0.21 | 0.17 | 0.01 | *** | *** | *** |
17:0 | 0.38 | 0.31 | 0.32 | 0.29 | 0.32 | 0.29 | 0.28 | 0.37 | 0.28 | 0.29 | 0.39 | 0.31 | 0.02 | * | * | ** |
iso-17:0 | 0.15 | 0.12 | 0.14 | 0.13 | 0.12 | 0.12 | 0.11 | 0.13 | 0.11 | 0.12 | 0.14 | 0.13 | 0.01 | NS | ** | * |
anteiso-17:0 | 0.17 | 0.15 | 0.13 | 0.04 | 0.05 | 0.04 | 0.06 | 0.06 | 0.04 | 0.03 | 0.04 | 0.04 | 0.01 | NS | *** | NS |
17:1 c9 | 0.18 | 0.12 | 0.13 | 0.09 | 0.07 | 0.08 | 0.08 | 0.09 | 0.07 | 0.08 | 0.09 | 0.08 | 0.01 | NS | *** | * |
iso-18:0 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 | 0.00 | 0.00 | NS | * | NS |
Total OBCFA | 2.28 | 1.82 | 1.92 | 2.19 | 2.50 | 2.24 | 2.32 | 2.96 | 2.22 | 2.42 | 3.21 | 2.55 | 0.11 | ** | *** | *** |
Total BCFAb | 0.70 | 0.58 | 0.59 | 0.57 | 0.69 | 0.61 | 0.65 | 0.82 | 0.62 | 0.71 | 0.94 | 0.78 | 0.03 | ** | *** | *** |
Total OCFAc | 1.59 | 1.24 | 1.33 | 1.62 | 1.81 | 1.63 | 1.67 | 2.14 | 1.60 | 1.71 | 2.27 | 1.77 | 0.09 | ** | *** | *** |
Total iso BCFAd | 0.39 | 0.32 | 0.34 | 0.33 | 0.42 | 0.37 | 0.36 | 0.50 | 0.37 | 0.43 | 0.59 | 0.48 | 0.02 | ** | *** | *** |
Total anteiso BCFAe | 0.31 | 0.26 | 0.25 | 0.24 | 0.27 | 0.24 | 0.29 | 0.32 | 0.26 | 0.28 | 0.35 | 0.30 | 0.02 | * | *** | ** |
aLeast-sqaures (LS) means are based on n = 7 Holstein (HO), n = 8 Jersey (JE), and n = 7 HO x JE crossbreeds (CB).
bTotal BCFA: all branched-chain fatty acids (iso-13:0 to iso-18:0 and anteiso-13:0 to anteiso-17:0).
cTotal OCFA: all odd-chain fatty acids (5:0 to 17:0).
dTotal iso BCFA: all iso branched-chain fatty acids (iso-13:0 to iso-18:0).
eTotal anteiso BCFA: all anteiso branched-chain fatty acids (anteiso-13:0 to anteiso17:0).
fBreed effect.
gTime point effect.
hBreed x time point interaction.
ƚ 0.05≤P<0.10
*P<0.05
**P<0.01
***P<0.001, NS = Not significant.