A circular diagram of the hau CMS line mitochondrial genome. From outside to inside: numbers on the outermost circle represent the physical map scaled in bp. Coding sequences transcribed in the clockwise and counterclockwise direction are drawn on the inside and outside of the second circle, respectively. Genes encoding proteins from the same complexes are similarly colored as are rRNAs and tRNAs in the inner circle. The third circle shows the locations of repeats larger than 100 bp with the most compelling evidence for recombination activity, and detailed information for repeats is shown in Additional file 5.