抄録
1. Chromosome numbers of Swiss Giant Pansy, Viola×Wittrockiana Gams were counted to be 2n=24 in the somatic tissues of seven varieties.
2. The seven varieties with different flower colors were crossed and approximate dominance relations were observed.
3. Anthocyanins present in flowers of parental varieities and their F1 hybrids were paper-chromatographically analysed. Every one of anthocyanin constituents found in the F1 hybrids corresponds on the chromatograms to one present in the parental varieties.
4. The genetic background responsible for the production of a major anthocyanin, aD2, is dominant over that of another major anthocyanin, C3.
5. Anthocyanins present in cyanic flowers reappear as a group in F1 hybrids between cyanic and acyanic varieties.
6. Some anthocyanins are quantitatively increased, decreased or inhibited in F1 hybrids among the cyanic varieties.
