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Zhe Cao, Zhanao Deng, and Mike Mclaughlin

development of caladium cultivars have been largely a matter of speculation. Caladium bicolor and C . marmoratum were thought to be the chief parent of fancy-leaved cultivars ( Hayward, 1950 ; Wilfret, 1993 ), and C. picturatum or C. schomburgkii

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Zhanao Deng, Fahrettin Goktepe, Brent K. Harbaugh, and Jinguo Hu

species accessions ( C. bicolor , C. marmoratum , C. picturatum , and C. schomburgkii ), and all 59 caladiums (45 cultivars and 14 species accessions) included in this study. Genetic diversity and relationships among cultivars. Of the 297

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Jialin Yu and Nathan S. Boyd

Caladium ( C. bicolor spp.), a member of the plant family Araceae (aroid), is valued for its long-lasting colorful foliage. Caladium is widely planted in gardens and landscapes and used as ornamental plants. After years of plant breeding, caladium

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Brian A. Krug, Brian E. Whipker, and Ingram McCall

Caladiums can be excessively large relative to the container in which they are grown, and plant growth regulators (PGRs) are required for height control. No industry standard has been set for optimal height of caladiums, but plants 25 to 28 cm tall

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Charles F. Gager and Gary J. Wilfret

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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Gitta Shurberg, Amy L. Shober, Christine Wiese, Geoffrey Denny, Gary W. Knox, Kimberly A. Moore, and Mihai C. Giurcanu

2 N, respectively, depending on year and mulch treatment); however, fertilizer rate did not affect plant aesthetic quality. Similarly, tuber weight and production index of field grown caladium increased when N was applied at 200 or 300 lb

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S. Brooks Parrish and Zhanao Deng

Caladium have been reported as far back as 1940 when the somatic chromosome number for Caladium bicolor was reported to be 2 n = 30 (Kurakubo, 1940). Jones (1957 ) and Pfitzer (1957 ) reported chromosome numbers of C . × hortulanum cultivars to be

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Zhanao Deng and Brent K. Harbaugh

accessions of C . bicolor , C . marmoratum , C. picturatum , or C . schomburgkii that are believed to have contributed to the development of cultivated caladium (C. × hortulanum ) ( Birdsey, 1951 ; Hayward, 1950 ; Wilfret, 1993 ). It was suspected

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Zhanao Deng, Fahrettin Goktepe, and Brent K. Harbaugh

Vent. species, including Caladium bicolor (Aiton) Vent., Caladium marmoratum Mathieu, Caladium picturatum C. Koch, and Caladium schomburgkii Schott, which are native to the tropical regions of South America and Central America ( Birdsey, 1951

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Michelle A. Grabowski and Dean K. Malvick

originate from C. bicolor , C. picturatum , C. marmoratum , or C. schomburgkii ( Deng et al., 2007 ). Future studies could be conducted to identify resistance in other caladium cultivars or species. Canna is the sole genus in the family Cannaceae