Fig. 2

Analysis of 840,171 LD-pruned SNPs reveals patterns of population structure of 262 M. truncatula accessions and their geographical distribution around the Mediterranean Basin. a The stratification of the collection is obtained assuming K = 8. The x-axis represents the accessions broadly sorted according to their reported longitude and ancestry. Each accession is represented by a vertical stacked column of color-coded admixture proportions that reflects the genetic contributions from putative ancestral populations. b Geographical location of 245 accessions. At each location, a pie chart represents the admixture proportions of the accessions’ genome. Color coding of admixture components is the same as in a. A Lambert Conic Conformal Projection (EPSG:3034), suitable for the Mediterranean Basin, was used to draw the geographical maps