Pelargonium species / accessions with JKI collection number for which the 2C DNA content was determined in this study.

The assignment of sections is based on Röschenbleck et al. [2]. Chromosome numbers, ploidy levels and chromosome lengths were obtained from the literature. 1Cx DNA contents in brackets were calculated with presumable ploidy level (bold). SD: standard deviation, Ra: Raphanus, To: tomato, Ca: cauliflower.