Table 4.
Principal component analysis on the computerized sperm kinematic parameters obtained from Rhode Island Red and White Leghorn roosters at 53 wk of age.
| Breed | PC | Initial eigenvalues |
Eigenvectors |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eigen values | Variance (%) | Cumulative variance (%) | VCL | BCF | STR | VSL | ALH | LIN | WOB | VAP | ||
| RIR | PC1 | 4.09 | 51.09 | 51.09 | 0.89 | 0.28 | −0.82 | −0.13 | 0.94 | −0.83 | 0.31 | 0.93 |
| PC2 | 1.48 | 18.52 | 69.60 | 0.29 | −0.56 | 0.18 | 0.83 | 0.27 | 0.36 | −0.26 | 0.29 | |
| WL | PC1 | 3.38 | 42.28 | 42.28 | 0.94 | −0.49 | −0.32 | 0.50 | 0.95 | −0.39 | 0.01 | 0.92 |
| PC2 | 1.82 | 22.27 | 65.04 | 0.08 | −0.34 | 0.84 | 0.47 | 0.12 | 0.89 | 0.14 | 0.01 | |
Abbreviations: ALH, amplitude lateral head displacement; BCF, beat cross frequency; LIN, linearity; PC, principal component; RIR, Rhode Island Red; STR, straightness; VAP, average path velocity; VCL, curvilinear velocity; VSL, straight line velocity; WL, White Leghorn; WOB, wobble.