Table 5.
Degrees of freedom (Df) and Mean-Squares values of the effects for various reproductive traits of dairy bulls obtained through least squares analyses of variance
| SV | Df | S. Vol. | AD (×105) | AFSC (×105) | AFSF (×105) | ALSC (×105) | ALSF (×105) | SPP (×105) | FSPP (×105) | IM |
|---|---|---|---|---|---|---|---|---|---|---|
| Sp | 1 | 1.922 | 10.69 | 9.00* | 1.17 | 4.41 | 2.28 | 3.18 | 148.92* | 0.12 |
| Season (S) | 3 | 1.798 | 1.56* | 0.40 | 0.60 | 1.87* | 1.42 | 3.42 | 1.33 | 19.34 |
| Period (P) | 3 | 0.632 | 40.91 | 9.11* | 11.35* | 36.80 | 30.15* | 16.75* | 9.01* | 86.32 |
| P* Species | 3 | 2.736 | 17.04* | 4.11* | 4.76* | 28.00* | 19.27* | 11.46* | 3.71* | 40.67 |
| Residual | 98 | 1.094 | 3.6 | 0.60 | 0.84 | 3.33 | 3.28 | 2.77 | 1.07 | 25.16 |
*
p<0.05.
SV = Sources of variation; Sp= Species; S = Seasons of birth; P = Periods of birth; df = Degrees of freedom; S. Vol. = Semen volume (ml); AD = Age at disposal (d); AFSC = Age at first semen collection (d); AFSF = Age at first semen freezing (d); FSPP = Frozen semen production period (d); SPP = Semen production period (d); ALSC = Age at last semen collection (d); ALSF = Age at last semen freezing (d) and IM = Initial motility.