Figure 3. Flow cytometric histogram showing simultaneous analysis of 6 Callitriche taxa: C. cophocarpa (2n = 10), C. palustris (2n = 20), hybrid C. cophocarpa × C. platycarpa (C. ×vigens, 2n = 15), C. platycarpa (2n = 20), hybrid from the Tichá Orlice River (2n = 29) and C. hamulata (2n = 38).

Nuclei of all samples were isolated, stained with propidium iodide and analysed simultaneously.