INHERITANCE OF SHADES OF BRONZE AND PINK FLOWERS OF ANTIRRHINUM MAJUS

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Abstract
The influence of three genes, Inc, Pal and Dil, on the intensity of anthocyanin pigmentation in bronze and pink flowers of Antirrhinum majus was investigated. Formation of anthocyanin requires the presence of one allele each of Inc and Pal. Flowers of both palrec palrec and paltub paltub plants are acyanic (with eos eos) like those of inc inc plants. Inc and Pal are incompletely dominant. Dil is a dominant intensifier. The dosage effects of the three genes are additive, resulting in four shades of bronze and pink. The effect of one Inc allele in increasing pigmentation intensity approximates that of one Pal allele or that of one or two Dil alleles.Genetic evidence on gene synonymy shows that the p of Geissman and co-workers, Haney's iv and the authors' inc are identical. The allelic genes S and d of Wheldale are members of the Pal series and are not equivalent to the p of Geissman and co-workers.Flower colour genotypes of 13 commercial varieties of snapdragons are reported.