Fig. 1

Characteristics of the de novo assembly genomic features of I. hispidus ZA-14. From the outside to the inside are: I, contigs, the different colors represent different contigs (> 1 Mb in length); II, GC content: calculated as the percentage of G + C in 20 kb sliding windows and 1 kb non-overlapping windows. The inward blue part represents the GC content in the region lower than the average genome GC content, while the outward purple part represents the opposite; III, GC skew: calculated as the percentage of (G − C)/(G + C) in 20 kb sliding windows and 1 kb non-overlapping windows. The inward green part represents G/C < 1, while the outward pink part represents G/C > 1; IV, Gene density: three circles starting from the dark red color to inside, respectively, represent the numbers of coding genes, tRNAs, rRNAs and coverage of repetitive sequences in 100 kb sliding windows. The intensity of the color positively correlates with gene density; V, Gene density of collinear blocks. The height of the bars and folds is positively correlated with gene density.