Morphological characteristics and genome overview (v2.0) of the Populus pruinosa. (a), (b) P. pruinosa appearance in summer and winter. (c) Shoot and fruit. (d) Long-oval leaves. (e) Ovate leaves. (f) Broad-ovate leaves. (g) The Hi-C heatmap at 100-kb resolution of P. pruinosa genome assembly. Chr1-Chr19 represented the 19 chromosomes. (h) Circos plot of P. pruinosa genome assembly. (a) Assembled 19 chromosomes. (b–i) The distribution of the gene density, GC density, transposon density, tandem repeat density, SSR density, LTR density, Gypsy density, and Copia density, respectively, with densities calculated in 1-Mb windows. (j) Relationship between syntenic blocks, as indicated by lines.