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Table 1 Selection of standing genetic diversity does not explain adaptation

From: Reproductive assurance drives transitions to self-fertilization in experimental Caenorhabditis elegans

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 - -
  1. 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).