Several abnormal nodulation reactions in soybeans are known. These range from a complete lack of nodules, caused by the non-nodulating gene (Williams and Lynch, 1954) to plants with normal-appearing nodules (Vest et al., 1973), but low nitrogen fixation as exemplified by the 'Peking'-strain T23 combination. The purpose of the study reported here was threefold.
Lawson, R. M.; Lambert, J. W.; and Ham, G. E.
"Research notes: Characterization of several abnormal nodulation reactions
Soybean Genetics Newsletter: Vol. 6
, Article 39.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol6/iss1/39