Table 4.
Model regression coefficients (SE in parenthesis, g CH4/d), relative to a Limousin, from regressing methane production on animal breed composition1 with and without adjusting for a series of different performance traits2
| Methane | RMPadg | RMPcw | RMPlw | RMPenergy | RMPca | RMPla | RMPel | |
|---|---|---|---|---|---|---|---|---|
| HF | 49.96 (6.32) | 49.17 (6.06) | 58.55 (6.02) | 38.63 (5.77) | 17.58 (5.54) | 55.48 (5.91) | 39.08 (5.71) | 20.06 (5.52) |
| AA | 35.89 (7.58) | 24.50 (7.26) | 43.85 (7.18) | 29.77 (6.92) | 3.79 (6.64) | 34.14 (7.05) | 24.64 (6.85) | 7.68 (6.62) |
| AU | 33.00 (10.86) | 38.81 (10.41) | 34.54 (10.75) | 33.73 (9.92) | 31.93 (9.52) | 37.49 (10.55) | 36.50 (9.81) | 32.30 (9.48) |
| BB | 25.76 (16.33) | 32.10 (15.66) | 8.25 (15.52) | 8.23 (14.92) | 13.35 (14.32) | 16.48 (15.23) | 14.31 (14.76) | 10.57 (14.26) |
| CH | 41.16 (8.23) | 40.18 (7.89) | 31.16 (7.80) | 23.19 (7.51) | 23.88 (7.21) | 31.53 (7.65) | 24.14 (7.43) | 21.88 (7.19) |
| HE | 124.53 (10.50) | 108.14 (10.07) | 126.00 (9.93) | 107.16 (9.59) | 83.39 (9.21) | 114.68 (9.74) | 101.27 (9.49) | 85.69 (9.17) |
| JE | 18.21 (9.80) | 36.51 (9.39) | 47.22 (9.27) | 32.68 (8.95) | 21.58 (8.59) | 51.32 (9.10) | 37.51 (8.85) | 25.06 (8.55) |
| MO | 130.77 (68.74) | 140.26 (65.91) | 118.39 (73.72) | 151.42 (62.79) | 111.84 (60.25) | 124.37 (72.35) | 149.59 (62.11) | 120.93 (60.02) |
| NR | 22.20 (39.84) | 14.78 (38.19) | 21.24 (37.61) | −9.59 (36.39) | −15.72 (34.92) | 15.74 (36.9) | −9.93 (36.00) | −18.04 (34.78) |
| SA | 23.99 (11.80) | 27.73 (11.32) | 34.71 (11.16) | 27.31 (10.78) | 32.71 (10.35) | 32.43 (10.95) | 26.99 (10.67) | 32.09 (10.31) |
| SH | 57.13 (14.19) | 45.63 (13.61) | 61.32 (13.40) | 47.88 (12.96) | 35.19 (12.44) | 51.13 (13.15) | 42.30 (12.82) | 36.39 (12.39) |
| SI | 61.83 (9.96) | 50.29 (9.55) | 55.88 (9.40) | 41.07 (9.10) | 27.73 (8.73) | 49.14 (9.23) | 37.66 (9.00) | 27.85 (8.70) |
1HF, Holstein Friesian; AA, Aberdeen Angus; AU, Aubrac; BB, Belgian Blue; CH, Charolais; HE, Hereford; JE, Jersey; MO, Montbéliarde; NR, Norwegian Red; SA, Salers; SH, Shorthorn; SI, Simmental.
2Methane, average methane production; RMPadg, methane adjusted for average daily gain; RMPcw, methane adjusted for carcass weight; RMPlw, methane adjusted for liveweight; RMPenergy, methane adjusted for energy intake; RMPca, methane adjusted for carcass weight and average daily gain; RMPla, methane adjusted for liveweight and average daily gain; RMPel, methane adjusted for energy intake and liveweight.