Graft-induced changes in soybean storage proteins. I. Appearance of the changes

Summary Genetic changes induced by grafting were observed in soybean storage proteins, involving the 11S acidic subunit composition and Kunitz trypsin inhibitor. Changes from Gly ₁ Gly ₁to Gly ₁ gly ₁involved the 11S acidic subunit, and those from Ti ⁰Ti⁰ to Ti ³Ti⁰ involved the KTI in the first progeny (G₁S₁) in the scion (Gly ₁ Gly ₁ Ti ⁰Ti⁰, var. Kinzu) grafted onto var. Raiden (gly ₁ gly ₁ Ti ³ Ti ³). The progenies G₁S₂ and G₂S₁ from the seeds that had been changed segregated for both proteins. However, the segregation ratio in the progenies were different from those of the F₂'s from the sexual crosses between Kinzu and Raiden used for grafting. These findings show that the changes (changed genes) were transmitted to the progenies in an unstable manner.