Supporting information

SUPPORTING INFORMATION

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.