Glycine soja, known as wild soybean, is an annual plant in the family Fabaceae.

It may be treated as a separate species, the closest living relative of the cultivated soybean, Glycine max, an important crop,[2] or as a subspecies of the cultivated soybean, Glycine max subsp.

[1] The plant is native to eastern China, Japan, Korea and far-eastern Russia.

[3] Hill et al., 2004 b find that this species has resistance genetics not found in G. max (cultivated varieties).

[3] This may make G. soja useful as a wild relative for introgression of aphid resistance.