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Plant tissue culture can induce a variety of genetic and epigenetic changes in regenerated plantlets, a phenomenon known as somaclonal variation. Such variation has been widely used in the ornamental foliage plant industry as a source for selection of new cultivars. In ornamental aroids alone, at least 63 somaclonal-derived cultivars have been released. In addition to morphological differences, many somaclonal aroid cultivars can be distinguished by amplified fragment length polymorphism (AFLP) analysis. However, a few cultivars have no detectable polymorphisms with their parents or close relatives by AFLP fingerprints. It is postulated that DNA methylation may be involved in the morphological changes of these cultivars. In this study, methylation-sensitive amplification polymorphism (MSAP) technique was used to study DNA methylation in selected somaclonal cultivars of Alocasia, Aglaonema, Anthurium, Dieffenbachia, Philodendron, and Syngonium. Results showed that polymorphisms were detected in the somaclonal cultivars, suggesting that DNA methylation polymorphisms may associate with tissue culture-induced mutation in ornamental aroids. This is the first study of methylation variation in somaclonal variants of ornamental foliage plants. The results clearly demonstrate that the MSAP technique is highly efficient in detecting DNA methylation events in somaclonal-derived cultivars.

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Caladiums ( Caladium × hortulanum Birdsey, Araceae Juss.) are tropical ornamental aroids. They are often forced as potted plants and grown in the landscape to provide color ( Evans et al., 1992 ). A great majority of caladium plants in the

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Cultivated caladium is an ornamental aroid produced for container or hanging basket plants or grown in landscapes for their variably shaped, colorful foliage. The ornamental value of caladium plants, to a great extent, depends on their leaf

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Caladium ( Caladium × hortulanum Birdsey, Araceae Juss.) is an ornamental aroid often grown in containers or planted in the landscape as accent and border plants ( Deng, 2018 ; Evans et al., 1992 ). Caladium plants are valued for their variably

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Caladiums ( Caladium ×hortulanum Birdsey, Araceae Juss.) are ornamental aroids often used as container or landscape plants ( Evans et al., 1992 ). They are valued for their variably shaped, bright foliage. Most commercial caladium plants are

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Caladiums are ornamental aroids widely grown as pot plants or used in landscapes as accent or border plants. Commercial pot caladium plants are produced by forcing tubers, while dry tubers are available for garden or landscape planting ( Evans et

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Caladium ( Caladium × hortulanum Birdsey) is an ornamental aroid grown as landscape and potted plants. They are valued for their colorful foliage that comes in various leaf shapes and coloration patterns containing shades of red, pink, white

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