Newell and Hymowitz (1982) reported successful hybridization between the soybean (cv 'Altona') (2n = 40) and a wild perennial relative Glycine tomen-tella (IL 428) (2n = 78). The F1 plant was completely sterile (2n = 3x = 59). A graft of the F1 plant was made on to the cv 'Williams'. The chromosome num-ber of the grafied plant was doubled (2n = 6x = 118) by treatment with 0.1% colchicine. The F1 colchicine-treated plant-produced two pods containing three seeds.
Hymowitz, T. and Singh, R. J.
"Research Notes : United States : A soybean x Glycine tomentella hybrid: Progress and problems,"
Soybean Genetics Newsletter: Vol. 11
, Article 33.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol11/iss1/33