MODE OF INHERITANCE AND ALLELE EXPRESSION OF THREE MAJOR ANTHOCYANADINS IN EUSTOMA GRANDIFLORUM CULTIVARS

The inheritance of three major anthocyanidins, pelargonidin (Pg), cyanidin (Cy) and delphinidin (Dp), was studied in Eustoma flowers.
A clear phenetic segregation in the F2-population was observed with the presence of alleles for anthocyanidins synthase, which appeared basically with Mendelian ratios.
Based on these observations and Chi-square analysis, multiple alleles are proposed in the B-ring hydroxylation system, with at least four alleles responsible for the flavonoid 3′- and/or 3′,5′-hydroxylase.
The genotypes are presented as H^T, H^F, H^D and H^O in Eustoma flowers, controlling 3′-; 5′-; 3′,5′-; and 3′- and 3′,5′-hydroxylation, respectively.