*2.2. Repeat Composition of Organelle Genomes in Trifolium*

Repeat sequences were estimated four mitogenomes and thirteen plastomes (Table 2). The amount of repetitive sequences in mitogenomes was not highly variable (6.6~8.6 %). In contrast, the amount of repetitive DNA in plastomes was highly variable (4.4%~20.7%) and can be divided into two non-overlapping ranges that corresponded to two groups of two sections (subgen. *Chronosemium* sect. *Chronosemium* and subg. *Trifolium* sect. *Paramesus*, 4.4%~5.2 %) and five sects. of subg. *Trifolium* (*Lupinaster*, *Trichocephalum*, *Trifolium*, *Vesicastrum* and *Trifoliastrum*, 10.7%~20.7 %). The contrasting repeat composition between organelle genomes was particularly evident in *T. pratense*, which had smallest amount of repeat sequence in its mitogenome and the largest amount in its plastome (Figure 3; Table 2).



**Figure 3.** Distribution pattern of dispersed repeat sequences in circular representations of organelle genomes of two *Trifolium* species. Each ribbon represents a BLAST hit for a pair of dispersed repeats. Brown circles are mitogenomes and green circles are plastomes. Multiple hits in a single region are indicated by histograms in outer concentric rings. Data for repetitive sequences of all published organelle genomes of *Trifolium* is available in Table 2.
