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Gene map of Allium chloroplast genomes (represented by A. caeruleum). Genes outside the circle are transcribed clockwise, and genes shown on the inside of the circle are counterclockwise. Genes belonging to the functional group are color-coded. The darker gray in the inner corresponds to GC content, and the lighter gray corresponds to AT content. IR = inverted repeat; SSC = small single copy; LSC = large single copy.
