Table 1.
Descriptive statistics of the traits studied
| Trait; abbreviation | Unit | No. of animals | No. of records | Mean | SD | Min | Max |
|---|---|---|---|---|---|---|---|
| Semen volume; VOL | ml | 896 | 45,913 | 126.7 | 56.8 | 9 | 321 |
| Sperm concentration; CON | 108 counts/ml | 896 | 45,913 | 5.81 | 2.36 | 0.24 | 13.73 |
| Proportion of morphologically normal sperm; PROP | — | 896 | 45,913 | 0.89 | 0.05 | 0.10 | 1 |
| Total number of sperm; NUM | 108 counts | 896 | 45,913 | 660.3 | 245.6 | 5.7 | 2,753.1 |
| Total number of morphologically normal sperm; NUMN | 108 counts | 896 | 45,913 | 588.3 | 221.5 | 5.2 | 2,505.3 |
| Total number born; TNB | Number | 1,400 | 6,950 | 9.8 | 2.6 | 1 | 18 |
| Number born alive; NBA | Number | 1,400 | 6,950 | 9.1 | 2.4 | 1 | 17 |
| Number stillborn; NSB | Number | 1,400 | 6,950 | 0.7 | 1.0 | 0 | 8 |
| Total litter weight at birth; LWB | kg | 1,400 | 6,950 | 14.1 | 3.6 | 1.2 | 26.5 |
| Mean litter weight at birth; MWB | kg | 1,400 | 6,950 | 1.58 | 0.25 | 0.81 | 2.17 |
| Survival rate at birth; SVB | — | 1,400 | 6,950 | 0.94 | 0.09 | 0.33 | 1 |
| Litter size at weaning; LSW | number | 586 | 2,237 | 7.7 | 2.1 | 1 | 13 |
| Total litter weight at weaning; LWW | kg | 586 | 2,237 | 41.4 | 11.2 | 5 | 76.8 |
| Mean litter weight at weaning; MWW | kg | 586 | 2,237 | 5.54 | 1.12 | 3.10 | 9.48 |
| Survival rate from birth to weaning; SVW | — | 586 | 2,237 | 0.83 | 0.16 | 0.15 | 1 |
| Average daily gain; ADG | g/d | 9,550 | 9,550 | 704.8 | 64.5 | 519.5 | 921.4 |
| Backfat thickness; BF | mm | 9,550 | 9,550 | 26.1 | 7.1 | 10.3 | 50 |
| Loin muscle area; LMA | cm2 | 9,550 | 9,550 | 28.4 | 5.0 | 15.0 | 45.1 |