Identification of the Main Agent Causing Yellow Color of Yellow-Flowered Cyclamen Muatnt.

The principal yellow pigment in petals of yellow-flowered cyclamen found in the inbred line of diploid cultivar of white-flowered cyclamen was isolated and identified chromatographically and spectrophotometrically as chalcononaringenin-2'-glucoside (isosalipurposide).This mutant clone seems to lack the same recessive enzyme chalcone-flavanone isomerase as the mutant of Callistephus chinensis. The prospects on the breeding for deep yellow-colored cyclamen are discussed.