Fig. 2

Circular genome maps and distribution of variants of the A Chloroplast and B mitochondrial Genome of Brassica napus. The outer circle is the organellar genome map displaying genes in different functional categories (listed in the legend) distinguished by colors. Genes marked inside the circle are transcribed clockwise, while outside the circle are counter clockwise. The inner circle displays the distribution of variants in different groups, the dark gray bars representing all assembled accessions, and blue highlights corresponding to four different cytoplasm (nap, cam, pol and ole), the higher the bar or the darker the color, the greater the density. The length of each bar denotes the total number of variants in a 500-bp window