Fig. 3 Characterization of the Populus tomentosa genome. ( a ) Populus tomentosa genome overview. Genome features in 200Kb intervals across the 38 chromosomes. Units on the circumference show megabase values and chromosomes. ① Choromosome karyotype. ② GC content (33.6 %. red line 50 %, green line 30 %). ③ Repeat coverage (45–1,937 repeats). ④ Gene density (3–164 genes). ⑤ The innermost parts are homologous blocks (1,463 genes) from paralogous synteny analysis. ( b ) Distribution of repeat classes in the P. tomentosa genome. ( c) Distribution of predicted genes among different high-level Gene Ontology (GO) biological process terms.
Figure 4