A new genotype of 7 S globulin (β-conglycinin) detected in wild soybean (Glycine soja Sieb. et Zucc.)

Abstract

A new genotype of 7 S globulin (β-conglycinin) was detected in a wild soybean line collected from the Amakusa islands (Southwestern part of Japan). On SDS-PAGE analysis, this wild soybean line showed a lack or an extremely low level of the α, α' and β-subunit bands which compose 7S globulin. We called this line, 'QT 2'. Some mutant soybean lines showing a similar band pattern have already been induced. However, these mutants were lethal. On the other hand, the QT 2 line grew and produced progeny without any physiological abnormalities. The progeny seeds showed the same genotype as the original QT 2 line. Therefore, we concluded that the genotype of the QT 2 line is truly an inherited trait.