Fig. 1: Genome evolutionary history.
From: Chromosome-level genome assembly of a parent species of widely cultivated azaleas
a Chronogram showing divergence times and genome duplications in asterids (asterid II, asterid I, Ericales, and Cornales), with node age and the 95% confidence intervals labeled. Resolved polyploidization events are shown with blue (duplications) and red translucent dots (triplications). Pie charts show the proportions of gene families that underwent expansion or contraction. Predicated WGD only shown for Ericales and Cornales. *WGD identified in this study. #WGD reported in Wang et al.69. %WGD reported in Colle et al.18. b Ks distribution on the upper right (insert) is showing Ks distribution from orthologs between Vitis vinifera and each of the five species (Rhododendron delavayi, R. simsii, R. williamsianum, Camellia sinensis, and Camptotheca acuminata). Ks distribution in the lower left showing Ks distribution from paralogs within Rhododendron delavayi, R. simsii, R. williamsianum, Camellia sinensis, and Camptotheca acuminata. c Synteny and distribution of genomic features. a, the density of Ogre, a family of Gypsy LTR-RT. b, the density of Tekay, a family of Gypsy LTR-RT. c, The density of all Gypsy LTR-RT. d, the density of all Copia LTR-RT. e, gene density. f, histogram of GC content. A map connecting homologous regions of the genome is shown. The red lines represent syntenic regions for the WGD event (78 Mya) and blue lines represent γ-WGD event. The line segments of bold gray in outer circles indicate predicated centromeres and pericentromeric regions on the 13 chromosomes.
