Biochemical genetics of black pigmentation of soybean seed

Abstract

Black pigmentation of soybean [Glycine max (L.) Merr.] seed coats was studied by standard biochemical and genetical procedures to relate known genes with known compounds. The pubescence color allele, T, is involved in the dihydroxylation of the B ring in the formation of cyandin-3-glucoside. The flower color allele W₁, is Involved in trihydroxylation in the formation of delphindin-3-gloucoside. T is not necesary for the formation of delphinidin, but when T is present the production of delphinidin by W₁ is enhanced. T is plelotropic for hydroxylation of anthocyanidins and flavonols whereas W₁ is not.