Table 5.
Correlations coefficients of intake, performance, feed efficiency traits, and body composition measures with methane traits
| Traits1 | DME | RME | RMECO2 | MY | MI | MADG |
|---|---|---|---|---|---|---|
| DMI, kg | 0.50*** | 0.05 | 0.02 | −0.30*** | 0.13* | −0.14* |
| Average daily gain, kg | 0.31*** | 0.08 | 0.00 | −0.13* | 0.13* | −0.63*** |
| Carcass weight, kg | 0.31*** | −0.03 | −0.05 | −0.18** | −0.29*** | 0.00 |
| Muscle depth, mm | 0.13* | 0.00 | −0.01 | −0.04 | −0.21*** | 0.08 |
| Fat depth, mm | 0.14* | −0.03 | 0.00 | −0.16** | 0.00 | −0.05 |
| Intramuscular fat, % | 0.03 | −0.07 | −0.07 | −0.17** | −0.08 | −0.05 |
| G:F | −0.05 | 0.09 | −0.03 | 0.14* | 0.04 | −0.66*** |
| RFI | 0.23*** | −0.01 | 0.04 | −0.24*** | 0.31** | 0.16** |
1DME, daily methane emissions; DCE, daily carbon dioxide emissions; RME, residual methane emissions; RMECO2, residual methane emissions calculated with carbon dioxide; MY, methane yield; MI, methane intensity; MADG, methane emissions per kg of ADG; G:F, gain to feed; RFI, residual feed intake.
*P < 0.05.
**P < 0.01.
***P < 0.001.