Independent variable | d.f. | SS | MS | F-value | P-value |
|---|
Homozygosity | 1 | 0.069 | 0.069 | 0.569 | 0.456 |
Reproduction system | 2 | 2.349 | 1.175 | 9.643 | 0.001 |
Error | 33 | 4.019 | 0.122 | - | - |
Linkage disequilibrium | 1 | 0.034 | 0.034 | 0.209 | 0.650 |
Reproduction system | 2 | 1.391 | 0.0696 | 4.309 | 0.022 |
Error | 31 | 5.005 | 0.161 | - | - |
- Table shows the two analyses of covariance done to test if the fitness responses at generation 35 (Δw
t
) are explained by SNP homozygosity (1-Ho) or pairwise SNP linkage disequilibrium (r2) at generation 22 (see also Figure 5 and Methods for details on statistical models and calculations of genetic diversity). In each model, reproduction system (Trioecy, Monoecy, Androdioecy) is treated as the fixed independent variable. SS and MS stand for Sum-of-Squares and Mean-of-Squares, respectively. Error degrees of freedom (d.f.) for the model testing the effects of linkage disequilibrium is 31 because two monoecious populations from the sudden regime had such low SNP diversity that r2 could not be calculated (see Additional file 1: Figure S4).
