Table 2. Correlation Analysis.

Kendall’s tau-b Coefficient TB/Spearman’s Rank Order Coefficient ρ (rho)	(1) Holoploid chromosome number (n = 4–68)	(2) Monoploid Chromosome Number (x = 4–19)
(1) Holoploid genome size (1 C-value)	0.294**/0.382**	–
(2) Monoploid genome size (1 Cx value)	–	0.337**/0.441**

(1) Correlation between holoploid genome size (1 C-value) and holoploid chromosome number (n) across the Brassicaceae (331 species analyzed in total). (2) Correlation between monoploid GS (1 Cx value) and monoploid (base) chromosome number (x) across the Brassicaceae. The monoploid chromosome number of each taxon was adopted from the literature or deduced under the assumption of an ancestral crucifer karyotype of n = 8 for lineages I and III (Lysak et al., 2006; Schranz et al., 2006) and n = 7 for (extended) lineage II (Mandáková and Lysak, 2008). **P < 0.01.