Table 1 Summary of analyses of variance (ANOVA) for each trait evaluated
Carbon Isotope Composition (δ13C) | Nitrogen Isotope Composition (δ15N) | ||||||
Source | DF | F Value | P > F | Source | DF | F Value | P > F |
 Genotype (G) | 208 | 12.1 | < 0.0001 |  Genotype (G) | 208 | 3.1 | < 0.0001 |
 Environment (E) | 1 | 834.3 | < 0.0001 |  Environment (E) | 1 | 2440.1 | < 0.0001 |
 G × E | 194 | 1.6 | < 0.0001 |  G × E | 194 | 1.6 | < 0.0001 |
Nitrogen Concentration [N] | Normalized DTR to AgNO3 | ||||||
Source | DF | F Value | P > F | Source | DF | F Value | P > F |
 Genotype (G) | 208 | 12.4 | < 0.0001 |  Genotype (G) | 210 | 1.5 | < 0.0001 |
 Environment (E) | 1 | 284.0 | < 0.0001 |  |  |  |  |
 G × E | 194 | 1.7 | < 0.0001 |  |  |  |  |