Based upon morphology, geographical distribution, isozyme studies and meiotic chromosome behavior in intra-and interspecific hybrids, we tentatively have assigned the following diploid (2n=40) genome designations to species in the genus Glycine.
Singh, R. J. and Hymowitz, T.
"Research Notes : United States : The genomes of the genus Glycine,"
Soybean Genetics Newsletter: Vol. 12
, Article 19.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol12/iss1/19