Abstract
DNA C-values might be one of important indices in the evaluation of angiospermous invasiveness. To test this viewpoint, we compared DNA 1C-values and basic genome sizes in 3,676 angiosperms. The results suggest that: (1) the two nuclear values vary greatly among different groups, e.g., significantly higher in herbs than in trees, in monocots than in dicots, in perennials than in non-perennials; (2) the two nuclear values both have significant effects on plant invasiveness, especially in herbs, dicots, monocots, perennials, non-perennials, diploids, polyploids, Compositae, and Poaceae, while not significant in trees and Fabaceae. Similar to weeds, the two values in crops are low, which suggests that crops may commonly hold higher invasive potential; (3) to evaluate the invasiveness of a given species, the information about ploidy level is necessary, and for polyploids, basic genome sizes are more reliable. For the results suggest that the selection favors polyploids in weeds at least partly because of the downsizing of basic genome size along with polyploidization.
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Acknowledgments
The project was financially supported by Science and Technology Commission of Shanghai Municipality (No: 07DZ05020), General Administration of Quality Supervision, Inspection and Quarantine of P. R. China (Scientific program: 08-03, 200810787), Education Commission of Shanghai Municipality (No. 06ZZ20), Leading Academic Discipline Project of Shanghai Municipal Education Commission (No: J50401), and Zhejiang Provincial Natural Science Foundation (no. Y506007).
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Guo-Qi Chen and Shui-Liang Guo contributed equally to this work.
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Chen, GQ., Guo, SL. & Yin, LP. Applying DNA C-values to evaluate invasiveness of angiosperms: validity and limitation. Biol Invasions 12, 1335–1348 (2010). https://doi.org/10.1007/s10530-009-9550-0
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DOI: https://doi.org/10.1007/s10530-009-9550-0