Abstract
Somatic chromosome numbers and karyological features in 22 taxa of the genus Canna (Cannaceae) were investigated and are presented here for the first time. The chromosome numbers were primarily reported for C. bangii, C. indica var. sanctae-rosae and C. tulianensis. A triploid somatic chromosome number of 2n = 27 was found only in C. discolor, while the remaining taxa were diploids with 2n = 18. Chromosome numbers are considered to be remarkably stable within the Cannaceae. Canna shows a symmetric karyotype that consists mostly of median chromosomes, but with some subterminal or submedian chromosomes, and a karyotype homogenous in variation in chromosome length. The karyotype of some taxa of Canna, furthermore, is characterized by median chromosomes with a secondary constriction in the centromeric region. Cytotaxonomical characteristics of the family Cannaceae and the related groups in the Zingiberales are discussed.
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Acknowledgments
We are grateful to the Royal Botanic Gardens, Kew, UK, the Botanic Garden and Botanical Museum Berlin-Dahlem, Germany, the New York Botanical Garden, USA, the Hakgala Botanic Garden, Sri Lanka, the Royal Botanic Gardens, Sydney, Australia, and the Botanical Gardens of the University of Tokyo, Japan, for providing material used in this study. We thank Dr. Stephan Beck, Herbario National de Bolivia, for his logistical help in collecting Canna in Bolivia. We also wish to thank Prof. David Bufford, Harvard University, for reviewing the English manuscript and M. Hamaguchi and Y. Hayami for caring for the living plants used in this study. This research was partly supported by the Overseas Scholarship for Graduate Students of Nihon University.
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Tanaka, N., Uchiyama, H., Matoba, H. et al. Karyological analysis of the genus Canna (Cannaceae). Plant Syst Evol 280, 45–51 (2009). https://doi.org/10.1007/s00606-009-0165-9
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DOI: https://doi.org/10.1007/s00606-009-0165-9