Table 4.
Summary of the associations between ploidy levels and selected environmental variables in populations of Allium oleraceum in the Czech Republic
| Variable | Test | d.f. | Test statistics | P |
|---|---|---|---|---|
| Habitat type | CT | 12 | 14·32 | 0·286 |
| Presence of arable land | CT | 2 | 18·96 | ≪0·001 |
| Habitat naturalness | CT | 2 | 20·39 | ≪0·001 |
| Climatic region | CT | 4 | 46·94 | ≪0·001 |
| Altitude | KW | 2 | 3·40 | 0·183 |
| Light conditions | KW | 2 | 1·47 | 0·478 |
| Soil C* | ANOVA | 2 | 2·12 | 0·122 |
| Soil N | KW | 2 | 6·68 | 0·035 |
| Soil PO43− | KW | 2 | 12·48 | 0·002 |
| Soil pH | KW | 2 | 5·49 | 0·064 |
| Soil Ca2+ | KW | 2 | 8·43 | 0·014 |
| Soil Mg2+* | ANOVA | 2 | 0·92 | 0·631 |
| Soil K+* | ANOVA | 2 | 0·68 | 0·534 |
Differences were tested either by one-way ANOVA, Kruskal–Wallis test (KW) or contingency tables (CT).
*Data were log (x + 1) transformed before analysis. P-values in bold are significant after Bonferroni correction (P < 0·004).