Fig. 3

a Principal coordinates analysis of 28 accessions of Passiflora belonging to six closely related passion fruit species based on microsatellite polymorphism. Samples are identified according to accession number on Table 1, preceded by species initial: P. edulis (samples e1 to e11); P. alata (samples a14 to a18); P. maliformis (samples m56 to m58); P. nitida (samples n65 to n67); P. quadrangularis (samples q74 and q75) and P. setacea (samples s85 to s88); b Plot of K vs Delta K values to define the most probable number of clusters in the analysis of population structure and ancestry of 28 Passiflora accessions without prior assignment to species; c Passiflora accessions were allocated to clusters based on Q values (Q > 0.70) for K = 4. Admixed or intermediate samples identified with an asterisk