Figure 4.

The inner circle of the mitochondrial genome structure comparison diagramis the maintainer line 327B genome, and the outer circle is the sterile line 327A genome. And this diagram plotted by SyRI (Max Planck Institute for Plant Breeding Research, Planegg-Martinsried, Germany) [25]. (Collinear: homo-linear region; Translocation: translocation region; Inversion: an inversion area; Tran+Inver: translocation and inversion region; Insertion: insertion areas of 50 bp or longer; Deletion: deletion area of length greater than or equal to 50 bp; Complex InDel: regions that do not match but correspond in location; Forward chain: The forward chain of the genome sequence, where the gene coordinates increase in the clockwise direction; Reverse chain: The reverse chain of the genome sequence, where the gene coordinates increase counterclockwise.)