Table 3.
Kinematic variables (mean ± SEM) of boar ejaculates by sire genetic line.
| Sire Line | ||
|---|---|---|
| Variable | Pietrain | Duroc × Pietrain |
| VCL | 71.10 ± 0.18 a | 76.15 ± 0.06 b |
| VSL | 39.32 ± 0.11 a | 32.25 ± 0.04 b |
| VAP | 47.51 ± 0.11 a | 43.70 ± 0.04 b |
| LIN | 55.34 ± 0.14 a | 43.68 ± 0.05 b |
| STR | 80.03 ± 0.12 a | 72.02 ± 0.04 b |
| WOB | 67.58 ± 0.08 a | 58.57 ± 0.03 b |
| ALH | 2.61 ± 0.01 a | 2.93 ± 0.02 b |
| BCF | 8.16 ± 0.01 a | 8.63 ± 0.02 b |
Number of ejaculates = 40. VCL: curvilinear velocity (µm·s−1); VSL: straight line velocity (µm·s−1); VAP: average path velocity (µm·s−1); LIN: linearity of forward progression (%); STR: straightness (%); WOB: wobble (%); ALH: amplitude of lateral head displacement (µm); BCF: beat-cross frequency (Hz). SEM: standard error of the mean. a–b Different letters indicate differences between sire lines. p < 0.05.