Fig. 1.

Nucleotide and structural variation identified between domesticated soybean (G. max) and wild soybean (G. soja) in gene coding regions. The arrows indicate gene positions along a hypothetical chromosomal region. The numbers of genes exhibiting variation between G. max and G. soja for each type of variation are shown in parentheses. Nucleotide variants that influence protein function or structure, such as base substitutions and small frame-shift mutations, are shown on the left (red triangles represent sites of nucleotide differences). Genomic structural variations, such as inversions, deletions, insertions, and translocations, are shown on the right. The number of genes that are found in G. soja and missing in G. max is ambiguous because of sequence gaps in the reference sequence; however, several examples of G. soja-specific genes were validated. The methodology used in this study (3) was unable to resolve chromosomal translocations, so the number of genes in this category remains unknown.