Table 7.
Estimates of regression coefficients (SE) on heterozygosity and expected heterosis for dataset 3 for Models 2, 3, and 4
| Traita | Heterozygosity | Hetbreedb Line 1 | Hetbreed F1c | Hetbreed backcrossd | Hetbreed Line 2 | Expected heterosis |
|---|---|---|---|---|---|---|
| W21, kg | 2.80* (0.75) | 2.21 (1.63) | − 23.08* (9.13) | − 3.38 (18.20) | 2.54* (0.89) | 0.01 (0.00) |
| W150, kg | 82.93* (6.02) | 82.76* (7.11) | 145.03 (88.57) | NA | 76.06* (12.82) | 0.19 (0.03) |
| BF100, mm | − 0.86 (0.72) | − 1.73 (0.94) | − 4.59 (9.12) | − 3.61 (50.69) | 0.56 (1.21) | 0.01 (0.00) |
| LD100, mm | − 2.43 (1.61) | − 3.47 (2.14) | 11.42 (18.43) | 147.33 (107.35) | − 0.98 (2.50) | 0.05 (0.01) |
| A40, d | − 41.67* (3.41) | − 49.12* (4.30) | 9.28 (39.27) | − 27.99 (85.58) | − 32.14* (4.59) | 0.08 (0.01) |
| DTP, d | − 45.50* (3.41) | − 51.86* (4.62) | − 65.89 (43.97) | 78.26 (101.68) | − 36.28* (5.25) | 0.05 (0.09) |
| TFI, kg | − 52.98* (6.38) | − 70.14* (10.10) | − 79.70 (80.17) | − 44.19 (169.92) | − 35.06* (8.85) | 0.16 (0.16) |
| LMP, % | 1.62 (1.87) | NA | − 0.42 (23.24) | 29.03 (45.47) | 1.82 (2.14) | 0.24 (0.06) |
| DP, % | − 0.90 (1.50) | NA | − 8.83 (18.30) | − 36.62 (35.96) | − 0.76 (1.54) | 0.07 (0.09) |
| IMF, g/100 g | − 0.36 (0.42) | NA | − 0.55 (7.43) | NA | − 0.34 (0.53) | − 0.01 (0.01) |
| PHL | − 21.50* (11.37) | − 40.60 (35.60) | − 147.60 (166.38) | NA | − 19.47 (12.12) | 0.79 (0.15) |
| DRIP, % | 1.95 (1.79) | 6.80 (5.69) | − 16.56 (26.66) | NA | 1.48 (1.95) | 0.01 (0.02) |
| LB1 | 6.78* (3.27) | 9.82* (4.34) | − 198.96 (241.38) | NA | 2.68 (5.07) | 0.01 (0.01) |
* Regression coefficient significantly different from zero at P < 0.05
aW21 = 21 days weight in kg, W150 = 150 days weight in kg, BF100 = backfat at 100 kg measured on live animals in mm, LD100 = loin depth at 100 kg measured on live animals in mm, A40 = age at 40 kg, DTP = days from 40 to 120 kg, TFI = total feed intake from 40 to 120 kg in kg (i.e. feed intake per 80 kg live weight gain), LMP = lean meat percentage, DP = dressing percentage (slaughter weight/live weight), IMF = intramuscular fat percentage measured in the laboratory, PHL = pH of loin, DRIP = drip loss is the percentage loss of water from a piece of loin muscle between 96 h post mortem to 120 h post mortem, LB1 = live born first parity
bHetbreed is the model with heterozygosity within breed
cAlways less than 300 animals with observations for the trait in F1
dThe backcross is (Line 1 × F1 only). Less than 30 animals with observations for the trait in backcross