Fig 1.
Eucalyptus species for which provenances were studied, plotted on their respective geographic locations on a publicly available basemap reprinted under a CC BY 4.0 license with permission from The World Bank (https://datacatalog.worldbank.org/search/dataset/0038272/World-Bank-Official-Boundaries).
Table 1.
Section, provenances, source and number of individual trees sampled for each of the 16 Eucalyptus species included in the study.
Table 2.
List of the 44 Eucalyptus hybrids studied, obtained by controlled interspecific crosses of two or more species, classified into five groups according to the sections of Symphyomyrtus involved in the cross (Hybrids 1 –Hybrids 5).
Table 3.
Summary of the proportion of polymorphic SNPs (Minor Allele Frequency; MAF> 0.05) and their average MAF for the 27,298 filtered and LD pruned SNPs, and genetic diversity parameters (observed (Ho) e expected (He) heterozygosity) for each species and hybrid (see Table 2) germplasm source.
Fig 2.
Population structure analysis of the 440 trees of 16 Eucalyptus species and 44 hybrids classified according to the section of their component species involved (Hyb 1 to 5).
Fig 3.
Population structure analysis of each Eucalyptus species separately for which more than one provenance was studied.
Fig 4.
Analysis of the ancestral species’ genomic composition of the 44 interspecific hybrids studied.
The genomic proportions estimated by unsupervised inference with fastSTRUCTURE (top panel) and by a supervised model with species data as reference with ADMIXTURE (bottom panel), were compared with the expected composition from pedigree information (middle panel). The species were categorized into sections according to Brooker’s (2000) classification.
Fig 5.
PCA scatter plot of the 484 Eucalyptus individuals in the first two principal components.
Samples colored by species, provenances and hybrids were grouped in their respective classes according to the taxonomic sections involved in the cross. The ellipses depict the 95% confidence interval for the distribution of each species or hybrid group.