Fig. 2

Maximum likelihood species tree derived from the nuclear SNPs data. a Nuclear phylogeny. Cultivated olives are shown in green and wild olives in blue. The geographical location of the accession and the plastid haplotype are indicated. Only bootstrap values below 100% are shown. b Bayesian clustering for the nuclear SNP data estimated in Structure v2.3. Structure bar plot shows the genetic clusters differentiated by color. c Heatmap showing the D-statistic and its p value. Red color indicates higher D-statistics, and more saturated colors indicate greater significance