a. Summary of the de novo genome assembly and sequencing analysis of A. capillus-veneris. 1: chromosome length, 2: gene number, 3: GC content, 4: repeat density, 5: rRNA, 6-10: organ-specific expression genes, in which 6: gametophytes, 7: stems, 8: young-fronds, 9: sporangium-excised leaves, 10: sporangia, 11: syntenic blocks.
b. Distribution of intron and exon lengths, from ten representative species in land plants. The genome sizes of the ten species are indicated by the size of the circles.