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The Journal of Heredity 2002:93(1)
© 2002 The American Genetic Association 93:55-57

Brief Communication

Inheritance of Flower Color in Periwinkle: Orange-Red Corolla and White Eye

Y. Sreevalli, R. N. Kulkarni, and K. Baskaran

From the Central Institute of Medicinal and Aromatic Plants, Field Station, Allalasandra, Bangalore 560 065, India. This study and Y. Sreevalli were supported by financial assistance from the Karnataka State Council for Science and Technology, Bangalore, India.

Address correspondence to R. N. Kulkarni at the address above.

The commonly found flower colors in periwinkle (Catharanthus roseus)—pink, white, red-eyed, and pale pink center—are reported to be governed by the epistatic interaction between four genes—A, R, W, and I. The mode of inheritance of an uncommon flower color, orange-red corolla and white eye, was studied by crossing an accession possessing this corolla color with a white flowered variety (Nirmal). The phenotype of the F1 plants and segregation data of F2 and backcross generations suggested the involvement of two more interacting and independently inherited genes, one (proposed symbol E) determining the presence or absence of red eye and another (proposed symbol O) determining orange-red corolla.


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