Fig. 4

Schematic representation of the distribution of homologous sequences between mitogenome and plastome of A. longiglumis. Mitochondrial plastid DNAs (MTPTs) on the mitogenome are few and short in length. The outer circle of blue and pink section represents the mitogenome (mtDNA) and the plastome (cpDNA), respectively. The scale is 10 kb, marked on the genome. The yellow-green arcs in the middle represent the 22 MTPTs identified (please see Additional file 2: Table S7). We highlight the arcs in dark green and red if MTPT contained complete tRNA genes and protein-coding gene, respectively. They represent genes that migrated from the plastome to the mitogenome, including nine tRNA genes (eight are unique and there are two copies of trnC-GCA) and one protein-coding gene (rpl2). The homologous sequences located in the IR region of plastome was counted only once