Table 2.
The partial regression coefficients (standard error in parenthesis) for a series of different models regressing average methane production over the test period on a series of different performance traits for steers, heifers and bulls on a TMR diet, with the coefficient of determination (RMSE in parenthesis)
| Energy intake | Liveweight | Carcass weight | Average daily gain | R 2 (RMSE g CH4/d)1 | ||
|---|---|---|---|---|---|---|
| Steer | Heifer | Bull | ||||
| 1.19 (0.07) | 0.422 (31.24) | |||||
| 0.30 (0.02) | 0.372 (32.56) | |||||
| 28.49 (7.71) | 0.326 (33.62) | |||||
| 46.57 (7.39)a | 52.41 (8.41)a | −4.08 (14.10)b NS | 0.308 (34.21) | |||
| 0.98 (0.11) | 0.08 (0.03) | 0.426 (31.13) | ||||
| 0.26 (0.03) | 19.07 (7.45)a | 29.65 (8.23)a | −13.92 (13.30)b NS | 0.385 (32.26) | ||
| 0.29 (0.04) | 28.49 (7.71)a | 37.33 (8.39)a | −17.24 (14.10)b NS | 0.351 (33.05) | ||
| 1.17 (0.10) | 1.20 (0.11)NS | 0.424 (31.10) | ||||
| 1.23 (0.09) | −4.65 (5.92)NS | 0.427 (31.16) | ||||
| 1.02 (0.12) | 0.08 (0.03) | −4.21 (5.91)NS | 0.431 (31.06) | |||
| 1.21 (0.11) | 0.01 (0.05)NS | −4.98 (6.00)NS | 0.429 (31.01) | |||
1 R 2, coefficient of determination.
a,b,cRegressions with different superscripts in each row for each trait were significantly different (P < 0.05).
NSIndependent variable was not related to the dependent variable in this row.