LEAF SPOT COLOR AND VENATION INHERITANCE AND PETIOLE STRENGTH VARIATION IN CALADIUM

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  • 1 1Environmental Horticulture Dept., University of Florida, Gainesville, FL 32611
  • 2 2Gulf Coast Research and Education Center, Univ. of Fl., 5007 60th St. East, Bradenton, FL.

The mode of leaf spot color, venation color and pattern inheritance and differences in the apparent strength of leaf petioles were investigated. Progeny from self pollinations of Caladium bicolor cv. Painter's Palette and two commercial cultivars (`Florida Cardinal' and `Aaron') were utilized in a pedigree and back cross breeding program to delineate and prove a proposed model for the mechanisms controlling spot and vein color inheritance as well as the inheritance of venation patterns. Differences in the apparent strength of leaf petioles in Caladium were observed in the field, Anatomical and mechanical analysis using a Kramer Shear Cell, showed significant differences among 12 experimental lines, The relative strength of the petioles were correlated to petiole pigmentation, with darker colored petioles being stronger and less prone to bending than lighter colored petioles.

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