Fig. 4
From: Distinct hybridization modes in wide- and narrow-ranged lineages of Causonis (Vitaceae)
Inferred whole genome duplication events in Causonis based on transcriptome data. a Distribution density of Ks distances of ortholog pairs between species of Causonis and the outgroup Pseudocayratia speciosa, and the distribution density of Ks distances of paralog pairs within the corresponding species, indicating genome duplications after the split between Causonis and Pseudocayratia. b Optimal MUL-tree inferred from GRAMPA analyses, using homologous gene trees against multispecies coalescent tree. Orange branches denote the allopolyploid origin of the core Causonis clade. Nodes marked in blue show the positions where polyploidization might have occurred, as suggested by gene tree reconciliation on the single-labeled tree