Table 1.
Results of the analysis of variance for the performance of laying hens according to environment (France or Taiwan) to selection background (selected line or control line) and to the naked neck genotype (homozygous normal, heterozygous or homozygous for the naked neck mutation)
| Traits | Environment (E) | Line (L) | Genotype (G) | E × L | G × E | G × L | G × E × L |
|---|---|---|---|---|---|---|---|
| Body weight at 16 weeks | *** | *** | * | *** | |||
| Age at first egg | *** | *** | * | ||||
| Clutch length | *** | *** | *** | ||||
| Clutch length (Trans.) | ** | *** | *** | ||||
| Egg number at 44 weeks | *** | *** | * | ||||
| Egg number at 44 weeks (Trans.) | *** | *** | *** | ||||
| Laying rate | *** | *** | |||||
| Adult body weight | *** | *** | |||||
| Egg weight | *** | * | * | + |
Significant at +, P < 0.1; *, P < 0.05; **, P < 0.01; *** P < 0.001