Fig. 1

Features and phylogenetic analysis of the B. austro-yunnanensis genome. a Overview of the B. austro-yunnanensis genome. The outer layer of the circular, gray blocks represents the 14 chromosomes, and gaps within the chromosomes are shown in white. The various inner tracks represent the following genome features, calculated over 500 kb sliding windows: (I) gypsy density; (II) copia density; (III) LTR density; (IV) gene density; (V) LAI score; and (VI) GC content. b Phylogenetic tree of 28 species generated by coalescent analysis. Branch lengths represent divergence times. Posterior probabilities (PPs) and bootstrap support (BP) are indicated for each internal branch. Asterisks indicate 100 BP in concatenation analysis and 1.0 PP in coalescent analysis. Dots represent nodes with different topology. The nodal circles represent the gene tree variation calculated by the nodal recovery in the gene trees. c ILS. Nodes are colored by estimated theta values. d Gene tree estimation error. Nodes are colored by BP values that represent the percentage of nodes recovered from the simulation. e Hybridization. Nodes are colored by the Reticulation Index. Warmer colors indicate greater gene tree variation, higher ILS occurrence probabilities, higher gene tree estimation errors, and higher probabilities of hybridization in b, c, d, and e, respectively. Percentages of gene tree variation ascribed to ILS, estimation error, and gene flow are specified above the gray arrows