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FISH mapping of 45S and 5S rDNAs in S. spontaneum. Dual-color FISH assay using probe pairs of 45S (green) and 5S rDNA (red) in six S. spontaneum clones Yunnan84-268 (octaploid) (A), SES208 (octaploid) (B), Yunnan82-106 (decaploid) (C), Yunnan82-29 (decaploid) (D), Guangdong30 (dodecaploid) (E), and Fujian89-I-17 (dodecaploid) (F). The signal numbers of each probe are displayed. Arrows indicate the weak signals. Scale bars, 10 μm.
