Table 1.
Parameters (mean ± SD) and coefficients of determination of the growth curves1 for "white" homozygous (B/B), "silver" heterozygous (B/+) and "wild-type" recessive homozygous (+/+) Japanese quail, effects of the family, sex, and genotype on the parameters of individual curves, and comparisons between plumage colour genotypes
| Trait | Genotype | Anova | Significance of main effects | Contrast | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| White (B/B) |
Silver (B/+) |
Wild-type (+/+) |
R2 | Family | Sex | Genotype | (B/B)-(+/+) | (B/+) -(+/+) |
(B/B)-(B/+) | ||||
| A | 179.7 ± 29.2 | 179.8 ± 19.9 | 183.5 ± 18.9 | 0.79 | * | *** | NS | NS | NS | NS | |||
| Bw | 191.8 ± 31.4 | 196.1 ± 21.5 | 199.3 ± 19.9 | 0.80 | ** | *** | * | -12.8* | NS | -11.5* | |||
| k | 0.0376 ± 0.0093 | 0.0454 ± 0.0063 | 0.0447 ± 0.0050 | 0.62 | NS | *** | ** | -0.0067** | NS | -0.0068** | |||
| CD2 | 0.85 | 0.92 | 0.93 | -- | -- | -- | -- | -- | -- | -- | |||
1: Obtained with the monomolecular model: body weight = A-Bw exp(-kt), where A is the asymptotic body weight (g), Bw is the range of body weight from hatching to asymptotic weight, k is the relative rate of growth, and t is the age in days.
2: CD = coefficient of determination.
*:p < 0.05; **:p < 0.01; ***:p < 0.001; NS: not significant.