| Source | Type | ΔCт ± SD | 2−ΔΔCт |
| Tissue | Spleen | 8.20 ± 1.03a* | 294.07 |
| Thymus | 2.39 ± 0.32b* | 5.24 | |
| Titre | High | 8.14 ± 0.32a* | 282.09 |
| Low | 1.83 ± 0.14b* | 3.56 | |
| Sex | Male | 7.13 ± 0.35 | 140.70 |
| Female | 6.90 ± 0.44 | 119.43 | |
| Genotype | Naked neck | 6.48 ± 0.45 | 89.26 |
| Frizzle feather | 5.92 ± 0.66 | 60.55 | |
| Normal feather | 6.02 ± 0.62 | 64.89 |