Pleiotropic gene and its influence on stem, petiole and bract tip pigmentation in sunflower (Helianthus annuus L.)

The inheritance of stem, petiole and bract tip color was studied in the cross cms-103A × PFNB-2. F1 studies revealed that purple color of stem, petiole and bract tip is dominant over green color of these plant parts. Complementary gene action was observed for these characters in F2. The genes governing the inheritance of stem, petiole and bract tip colors were designated as Ptla and Psmb, Ptla and Ptlb, Ptla and Pbtb, respectively, the gene Ptla being common to all three traits.