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Journal of Heredity 2004:95(3):265-267
© 2004 The American Genetic Association

Brief Communication

Inheritance of Flower Color and Spininess in Safflower (Carthamus tinctorius L.)

M. H. Pahlavani, A. F. Mirlohi, and G. Saeidi

From the Department of Agronomy and Plant Breeding, Gorgan University of Agricultural Sciences, P.O. Box 386, Gorgan, Iran (Pahlavani), and College of Agriculture, Isfahan University of Technology, Isfahan, Iran (Mirlohi and Saeidi).

Address correspondence to M. H. Pahlavani at the address above, or e-mail: hpahlavani{at}yahoo.com.

Safflower (Carthamus tinctorius L.) flowers are used for coloring and flavoring food and also as fresh-cut and dried flowers. The most important characteristics which contribute to the ornamental value of safflower are flower color and spinelessness. The objective of this study was to determine the inheritance mode and the number of genes controlling spininess and flower color in some Iranian genotypes of safflower. The results indicated that the existence of spines on the leaves and bracts of safflower is controlled by a single dominant gene in which the spiny phenotype was completely dominant to spineless. In some crosses, flower color was controlled by two epistatic loci each with two alleles, resulting in a ratio of 13:3 in the segregating F2 population for plants with orange and yellow flowers. Also, other mechanisms of genetic control, such as duplicate dominance and duplicate recessive types of epistasis, were observed for flower color in other crosses that led to ratios of 7:9 and 15:1 for plants with orange and yellow flowers, respectively. The results suggest that for ornamental use or in the food dying industry, genotypes with orange or yellow flowers and without spines on the leaves and bracts can be produced.


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