Fig. 6

Two heterozygous mitochondrial polymorphism sites, p.457333 (T > C) and p.457550 (G > A), might be associated with soybean adaptation. A-D The reference allele frequencies of two heterozygous mitochondrial polymorphism sites and the nearby sites in soybean accessions with the mitochondrial haplotype MT1 (red) or MT2 (blue) (A), in wild (red) and cultivated (blue) soybeans (B) in landraces (red) and elite (blue) cultivated soybeans (C), and in cultivated soybeans of Northeast China (red) and in ones from Middle and South China (Huang-Huai-Hai region and South China) (blue) (D). NE, Northeast China. HS, Huang-Huai-Hai region and South China