Supplementary Table 3 : Statistical relationship between the latitude of origin and the performance of T. officinale from nine Chilean populations after growing on three experimental soil conditions (control unsterilized soil [the reference level], sterilized [M-], and sterilized, but reinoculated [Mr]). Performance was estimated in terms of: survival (%), biomass (g) and number of flowers (n) and analyzed with three independent LMM models, from which fixed and random factors are shown. Regarding the latitude, a significant linear predictor suggests a relation between latitude and the respective response (i.e.: survival, biomass, or flowers), while in a quadratic term it indicates the non-constancy of the amount of change along the latitudinal gradient. All models showed a significant random effect of the population for explaining the data variance. Model coefficients (β), confidence intervals (C.I.), probability value (p ), degrees of freedom (d.f. ), likelihood ratio (L-ratio). Significance was considered at p values < 0.05 and denoted in bold.