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Table 1 Selected milk lipid fatty acids during period 1 (1 until 42 DIM)

From: A commonly used rumen-protected conjugated linoleic acid supplement marginally affects fatty acid distribution of body tissues and gene expression of mammary gland in heifers during early lactation

Fatty acid [g/day] Treatment1 SEM P-value
  CON CLA   Trt Trt x WL2
4:0 37.5 37.0 2.6 0.906 0.528
6:0 27.2 22.9 1.5 0.051 0.496
8:0 15.4 12.1* 0.74 0.005 0.809
10:0 36.9 26.8* 1.6 0.000 0.987
12:0 39.3 27.8* 1.7 0.000 0.926
14:0 11.5 92.4* 4.2 0.005 0.992
c 9-14:1 6.3 4.5* 0.36 0.002 0.561
15:0 12.0 10.1* 0.59 0.035 0.991
16:0 301 237* 11.8 0.001 0.199
c 9-16:1 12.2 12.3 0.84 0.924 0.436
17:0 6.1 6.0 0.35 0.728 0.658
18:0 97.8 92.1 8.4 0.633 0.402
t 6/t 7/t 8-18:1 1.6 2.1 0.17 0.063 0.663
t 9-18:1 2.0 2.3 0.12 0.088 0.414
t 10-18:1 4.2 6.8 1.1 0.096 0.822
t 11-18:1 7.3 8.7 0.77 0.215 0.240
t 12-18:1 2.1 2.6* 0.15 0.030 0.352
t 13/t 14-18:1 2.3 2.6 0.16 0.227 0.993
c 9-18:1 172 183 16.0 0.633 0.336
c 11-18:1 8.1 8.5 0.63 0.602 0.649
c 12-18:1 1.7 2.1* 0.14 0.032 0.605
c 13-18:1 0.91 1.0 0.08 0.662 0.249
18:2 n-6 14 14.8 0.95 0.571 0.016
18:3 n-3 0.23 0.2 0.01 0.104 0.857
CLA
  c 9,t 11-CLA 3.5 4.4* 0.30 0.039 0.787
  t 10,c 12-CLA 0.01 0.42* 0.02 0.000 0.125
  Other CLA 0.74 0.97* 0.07 0.022 0.787
Summations
  ∑ SFA 708 585* 29.5 0.008 0.617
  ∑ MUFA 230 246 18.9 0.563 0.394
  ∑ PUFA 25.3 27.8 1.8 0.335 0.143
  ∑ trans-18:1 24.3 30.7 2.18 0.054 0.998
  ∑ BCFA3 16.4 15.7 0.74 0.520 0.567
  ∑ C164 314 249* 12.4 0.002 0.191
  ∑ de novo5 300 246* 11.7 0.003 0.950
  ∑ preformed6 350 365 28.2 0.716 0.262
Ratio
  c 9-14:1/14:0 0.54 0.41* 0.03 0.006 0.434
  1. 1Treatment (Trt): cows in the control (CON) group (n = 10) received a control fat supplement, in which the CLA were substituted with stearic acid. Cows in the conjugated linoleic acid (CLA) group (n = 10) consumed 6 g/d each of trans-10,cis-12 CLA and cis-9,trans-11 CLA.
  2. 2Week of lactation; 3BCFA branched-chain fatty acids, 4C16 Sum of 16:0 and c 9-16:1.
  3. 5de novo: fatty acids <16 carbon atoms; 6preformed: fatty acids >16 carbon atoms.
  4. *Estimated mariginal means (EMMeans) are defined as significant (P < 0.05).