Fig. 2

Repeat content and repeat-mediated homologous recombination among Rosaceae mitogenomes. Number of total repeats (a) and total repeat length (b) of 38 Rosaceae mitogenomes. Red indicates repeat lengths were > 1000 bp; green indicates repeat lengths ranged from 501 to 1000 bp; pink indicates repeat lengths ranged from 100 to 500 bp; blue indicates repeat lengths were < 100 bp. c–f The correlation between genome size and total repeat number (c), total repeat length (d), total repeat number (repeat length ≤ 500 bp) (e), and total repeat length (repeat length ≤ 500 bp) (f) in 38 Rosaceae mitogenomes. R² indicates the coefficient of determination, and the P-value was determined by F-statistic. g Repeat-mediated recombination in 33 mitogenomes of ten genera. Each point represents a pair of repeats, and the y-axis represents the proportion of mapping to expected recombination products. R indicates the correlation coefficient, and the P-value was determined by a two-tailed Student’s t-test. h Distribution of recombination frequencies of the four repeat types based on repeat length (< 100 bp, 100 bp ≤ repeat length ≤ 500 bp, 501 bp ≤ repeat length ≤ 1000 bp, and repeat length > 1000 bp)