Table 2.
Effects of heat conditions and genotypes on the litter and growth traitsa.
| Trait | Environmental conditions | Genotypes | ||
|---|---|---|---|---|
| Normal | Heat stress | APRI | NZW | |
| TB | 9.21 ± 0.17 | 7.74 ± 0.21 | 8.89 ± 0.19 | 8.06 ± 0.21 |
| NBA | 8.34 ± 0.19 | 6.82 ± 0.26 | 7.88 ± 0.33 | 7.28 ± 0.23 |
| NW | 7.00 ± 0.20 | 5.95 ± 0.23 | 6.80 ± 0.20 | 6.13 ± 0.23 |
| NM | 6.18 ± 0.19 | 4.63 ± 0.26 | 5.66 ± 0.21 | 5.16 ± 0.24 |
| BW28 | 586.78 ± 4.64 | 568.05 ± 5.48 | 557.76 ± 4.24 | 598.50 ± 5.13 |
| BW42 | 1049.8 ± 9.95 | 922.1 ± 12.43 | 901.9 ± 9.9 | 1070.0 ± 9.66 |
| BW63 | 1727.8 ± 12.79 | 1476.5 ± 19.34 | 1490.9 ± 12.86 | 1713.2 ± 19.04 |
| ADG28−42 | 33.19 ± 0.48 | 25.30 ± 0.91 | 24.69 ± 0.48 | 33.85 ± 0.66 |
| ADG42−63 | 32.31 ± 0.30 | 26.46 ± 0.69 | 28.06 ± 0.39 | 30.62 ± 0.46 |
| ADG28−63 | 32.69 ± 0.34 | 25.93 ± 0.74 | 26.75 ± 0.62 | 31.91 ± 0.83 |
| DF28−42 | 73.8 ± 0.86 | 58.4 ± 1.80 | 57.3 ± 1.16 | 74.9 ± 1.49 |
| DF42−63 | 127.4 ± 1.16 | 109.2 ± 3.12 | 117.0 ± 2.06 | 120.6 ± 2.30 |
| DF28−63 | 120.4 ± 1.03 | 100.0 ± 2.60 | 105.3 ± 1.58 | 116.9 ± 2.01 |
| FCR28−63 | 3.72 ± 0.02 | 3.92 ± 0.05 | 3.98 ± 0.02 | 3.66 ± 0.03 |
TB, total born; NBA, number born alive; NW, number weaned; NM, number marketed; BW28, body weight at 28 days of age (g); BW42, body weight at 42 days of age (g); BW63, body weight at 63 days of age (g); ADG, average daily gain (g/day); DFI, daily feed intake (g); FCR, feed conversion ratio (g feed/ g body weight). aThe presented vales are posterior least-squares means ± SE.