Nuclear DNA content of 26 orchid (Orchidaceae) genera with emphasis on Dendrobium
1998
Jones, W.E. | Kuehnle, A.R. | Arumuganathan, K.
2C DNA content values for 70 orchid species from 26 genera, including 37 Dendrobium species from eight taxonomic sections, were analysed using flow cytometry. The resulting nuclear DNA content values for species other than Dendrobium ranged from 1.91 pg 2C-1 to 15.19 pg 2C-1 nuclei for Cadetia taylori and Vanilla phaeantha, respectively. Dendrobium nuclear DNA content values ranged from 1.53 pg 2C-1 to 4.23 pg 2C-1 nuclei for D. cruentum and D. spectabile, respectively. DNA content measurements varied greatly within Dendrobium sections Latouria and Spatulata. Nuclear DNA content values for the six species analysed within Latouria ranged from 1.88 pg 2C-1 nuclei for D. macrophyllum to 4.23 pg 2C-1 nuclei for D. spectabile. Nuclear DNA content values for the 16 species analysed within Spatulata ranged from 1.69 pg 2C-1 nuclei for D. discolor to 4.05 pg 2C-1 nuclei for D. samoense. The least variation in DNA content was found within the section Phalaenanthe, with nuclear DNA content values of 1.79 pg 2C-1, 1.86 pg 2C-1 and 1.98 pg 2C-1 for D. bigibbum, D. affine and D. phalaenopsis, respectively.
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