Figure 2: Homologous relationships between the 20 soybean chromosomes.
The bottom histogram plot shows pairwise Ks values for gene family sizes 2 to 6. Top panels show the 20 chromosomes in a circle with lines connecting homologous genes. Gene-rich regions (euchromatin) of each chromosome are coded a different colour around the circle. Grey represents Ks values of 0.06–0.39, 13-Myr genome duplication; black represents Ks values of 0.40–0.80, 59-Myr genome duplication. These correspond to the grey and black bars in the histogram. a, Chromosomes 1, 11, 17, 7, 10 and 3, which contain centromeric repeat Sb91. b, Chromosomes 19 and 6, which contain both Sb91 and Sb92 centromeric repeats. c, Chromosomes 18, 5, 8, 2, 14, 12, 13, 9, 15, 16, 20 and 4, which contain Sb92.
