Supporting information

SUPPORTING INFORMATION<b><br></b> Appendix S1 - List of the perennial ryegrass natural populations in study including information on collection sites and genebanks maintaining seed samples of these populations. Appendix S2 - Technical management of the three common gardens. Appendix S3 - Climatic conditions at the three common gardens over the duration of the experiments. Appendix S4 – Description and justification of the traits used in this study, computation methods for mean population values and trait summary statistics. Appendix S5 – Description of bioclimatic variables characterizing sites of origin of perennial ryegrass natural populations. Table S1 - Table of values of phenotypic traits recorded on perennial ryegrass natural populations. Table S2 – Table of values of bioclimatic variables characterizing sites of origin of perennial ryegrass natural populations. Table S3 - Mean values of phenotypic traits for each of the three phenotypic groups of perennial ryegrass natural populations. Table S4 - Correlations between bioclimatic variables and the first two canonical components of the LDA (Linear Discriminant Analysis) performed on the three perennial ryegrass groups with bioclimatic variables. Figure S1 - Illustration of summer persistence in 2016 at Lusignan (LU) for three plots sown with different perennial ryegrass natural populations.