Abstract
Tetraploids were successfully produced from diploid seeds obtained through interspecific crossing between Calanthe discolor and Calanthe sieboldii by treating with colchicine or oryzalin. Colchicine was tested at concentrations of 0.05 and 0.1 % for 0, 3, or 7 days and oryzalin was tested at a concentration of 0.003 % for 1, 2, 4, and 7 days, and the ploidy of the seedlings was determined by flow cytometry. Tetraploids (4×) were obtained from the interspecific hybrid seeds treated with all colchicine and oryzalin concentrations. The most efficient condition for inducing tetraploids seemed to be treated with 0.003 % oryzalin for 1 or 2 days. Cytological and morphological evidence confirmed the results of flow cytometric analysis. The stomatal density and sizes of the tetraploid plants were significantly higher and larger than those of the diploid plants. Differences in leaf shape were found between the tetraploid and diploid plants under the same growing conditions: the leaves of the diploids were elongated and those of the tetraploids were round.
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This paper was supported in part by the Sunchon National University Research Fund in 2013.
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Chung, M.Y., Kim, C.Y., Min, J.S. et al. In vitro induction of tetraploids in an interspecific hybrid of Calanthe (Calanthe discolor × Calanthe sieboldii) through colchicine and oryzalin treatments. Plant Biotechnol Rep 8, 251–257 (2014). https://doi.org/10.1007/s11816-014-0317-4
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DOI: https://doi.org/10.1007/s11816-014-0317-4