Fig. 1

Chloroplast genome map of Avena sativa_Liu312 (GWHAOPK01000000; the outer circle and rings “s-t”) and GView comparison [25] of thirteen Avena species and three outgroup species plastomes (rings “c-r”). Genes belonging to different functional groups are shown in different colors. Genes shown on the outside of outer circle are transcribed counter-clockwise and on the inside clockwise. The tRNA genes are represented by one letter code of amino acids with anticodons. LSC, large single copy region; IR, inverted repeat; SSC, small single copy region. Rings “a-b” from the innermost ring denote GC skews and GC content deviations from A. sativa_Liu312 plastome GC content, respectively; rings “c-r” denote the plastome sequence comparison by BLAST between A. sativa_Liu312 and other species plastomes outwards in turn: A. eriantha_Liu435, A. ventricosa_Liu275, A. atlantica_Liu437, A. wiestii_Liu439, A. strigosa_Liu 315, A. nuda_Liu443, A. hirtula_Liu299, A. sterilis_NC031650.1, A. sativa_NC027468.1, A. brevis_Liu289, A. sativa_Liu312, A. murphyi_Liu442, A. longiglumis_Liu438, wheat (Triticum aestivum_NC002762.1), maize (Zea mays_NC00166.1), and rice (Oryza sativa_NC008155.1); plastome similar and highly divergent locations are represented by continuous and interrupted track lines (except for 14 non-overlapping tracking bins across 16 rings “c-r”), respectively, with a heuristic considering the total number of plastome bases (135,887 bp to 135,998 bp) contributing to hits and their scores with 0–14 non-overlapping 10 kbp tracking bins. Rings “s-t” denote AT and GC content of Avena sativa_Liu312 plastome (GWHAOPK01000000) by OGDRAW [26]