Table 4 Association between physiological and rumen fermentation variables and relative methanogen abundance in beef heifers divergent for residual feed intake (RFI) 1
Items | HF Diet | LF Diet | ||||||
|---|---|---|---|---|---|---|---|---|
Methanogens | M. stadtmanae | M. smithii | M. ruminantium | Methanogens | M. stadtmanae | M. smithii | M. ruminantium | |
DMI2 | -0.30 | -0.05 | 0.14 | 0.06 | 0.13 | -0.14 | 0.22 | 0.08 |
CH43 | -0.27 | -0.36 | -0.36a | -0.38* | 0.13 | -0.47** | -0.07 | 0.03 |
MLW4 | -0.19 | -0.07 | -0.17 | -0.15 | 0.22 | 0.14 | -0.20 | -0.06 |
tVFA5 | 0.13 | 0.11 | 0.08 | -0.00 | 0.01 | 0.00 | -0.00 | -0.18 |
acetate | -0.01 | 0.06 | 0.11 | -0.04 | 0.44** | 0.07 | -0.18 | -0.14 |
propionate | 0.01 | 0.00 | -0.13 | -0.08 | -0.41** | 0.30 | -0.23 | 0.09 |
isobutyrate | 0.07 | -0.05 | -0.12 | 0.06 | 0.20 | -0.15 | -0.21 | 0.08 |
butyrate | -0.01 | 0.06 | -0.24 | -0.16 | 0.15 | 0.03 | -0.08 | -0.19 |
isovalerate | -0.01 | -0.05 | 0.08 | -0.30 | -0.12 | -0.13 | 0.17 | 0.12 |
valerate | -0.02 | -0.06 | 0.11 | -0.05 | -0.31 | -0.10 | 0.14 | 0.18 |
A:P6 | -0.02 | 0.05 | 0.14 | 0.07 | 0.42** | -0.14 | 0.22 | 0.08 |
pH | -0.11 | -0.05 | 0.14 | 0.07 | -0.49** | 0.14 | 0.22 | 0.08 |
CH4GEI7 | -0.01 | -0.03 | -0.15 | -0.15 | 0.03 | -0.23 | -0.24 | -0.05 |
DMD8 | 0.21 | 0.16 | -0.21 | -0.25 | 0.35* | 0.14 | -0.21 | -0.16 |
OMD9 | 0.22 | 0.15 | -0.20 | -0.14 | 0.34* | 0.14 | -0.22 | -0.15 |
CPD10 | 0.14 | 0.20 | -0.23 | -0.24 | 0.38* | 0.17 | -0.22 | -0.17 |
NDFD11 | 0.05 | 0.09 | -0.18 | -0.14 | 0.20 | 0.13 | -0.24 | -0.16 |
ADFD12 | 0.05 | 0.09 | -0.17 | -0.13 | 0.26 | 0.13 | -0.24 | -0.23 |
GED13 | 0.17 | 0.14 | -0.18 | -0.13 | 0.35 | 0.16 | -0.25 | -0.16 |