Fig 1.
Geographic location of the collection sites of the local plum accessions included in this study.
Collection localities prospected in areas from Northeastern Spain are indicated with orange dots.
Table 1.
Listing of plum reference cultivars included in this study indicating group assignment by STRUCTURE analysis and their chloroplastic haplotypes.
Table 2.
Allelic diversity of the European plum germplasm evaluated in this study.
Table 3.
CpDNA haplotypes and frequencies in the Prunus domestica L. unique genotypes identified in this study.
Fig 2.
Graphical display of the results of the STRUCTURE analyses.
Proportions of ancestry of 135 unique genotypes for groups inferred at K = 2 (A), K = 3 (B) and K = 5 (C). Each genotype is represented by a horizontal bar partitioned into two, three and five segments representing the estimated membership fraction in the groups obtained when K = 2, K = 3 and K = 5 were considered, respectively. Genotypes are presented in the same order in A, B and C. The groups inferred at K = 2 are depicted in green (G2.1) and in purple (G2.2). The groups inferred at K = 3 are depicted in green (G3.1), in blue (G3.2) and in red (G3.3). The groups inferred at K = 5 are depicted in green (G5.1), in light blue (G5.2), in dark blue (G5.3), in light pink (G5.4) and in dark pink (G5.5).
Table 4.
Genetic diversity measures for each of the genetic groups defined with STRUCTURE at K = 2, K = 3 and K = 5.
Number of genotypes (n), number of reference cultivars (nR), number of alleles (NA), number of exclusive alleles (NEA), mean pairwise distance (MPD), normalized intra-group variability index (nSSWG) and mean Bruvo distance between the genotypes clustered within each group.
Table 5.
Analyses of molecular variance (AMOVA) between the genetic groups defined with STRUCTURE at K = 2, K = 3 and K = 5.
Table 6.
Pairwise PhiPT values among the genetic groups defined with STRUCTURE at K = 2 (A), K = 3 (B) and K = 5 (C).
Values below the diagonal line refer to the pairwise PhiPT values based on 1000 permutations and those above the diagonal line to the significance of PhiPT values.