抄録
Torenia fournieri Lind. (2n=18) is known to occur in three flower colors, deep blue-purple, pale blue-purple and white. The pale blue-purple form was found in a population of the deep blue-purple form. The deep blue-purple and pale blue-purple flowers and those of six F1 hybrids among the three forms were determined to contain the same three anthocyanins, namely, malvidin-, petunidin- and delphinidin-glycosides. The white flowers were also found to contain traces of the anthocyanins. Malvidin-glycoside is the major component in all forms; it was isolated in crystalline form and identified with malvin. The other two are minor components.
It was concluded from F2 segregation that the genotypes of the three forms were AABB, AAbb and aaBB for deep blue-purple, pale blue-purple and white respectively, and that A and B are basic complementary genes controlling anthocyanin formation. The double recessive genotype aabb may be ascribed to the completely acyanic segregant with pure white flowers. Further, the effects of genes A and B on anthocyanin formation were estimated for six different genotypes.
Thus the concentrations of the anthocyanins show the following relations;
AABB=AaBB>AABb>AaBb>AAbb>aaBB>aabb=0
It was found that dominance of A over a is complete and that of B is incomplete under the present environmental conditions.
