Does actually mean chromosome number increase with latitude in vascular plants? An answer from the comparison of Italian, Slovak and Polish floras

作者：Peruzzi Lorenzo^*; Goralski Grzegorz; Joachimiak Andrzej J; Bedini Gianni

来源：Comparative Cytogenetics, 2012, 6(4): 371-377.

DOI：10.3897/CompCytogen.v6i4.3955

• Biogeography
• chromosome number
• cytogeography
• cytotaxonomy
• Europe
• polyploidy

We compared chromosome number (CN) variation among vascular floras of three different countries with increasing latitude in the Boreal hemisphere: Italy, Slovakia, Poland. Aim of the study was to verify whether the patterns of CN variation parallel the differences in latitudinal ranges. The three datasets comprised 3426 ( Italy), 3493 ( Slovakia) and 1870 ( Poland) distinct cytotypes. Standard statistics ( ANOVA, Kruskal-Wallis tests) evidenced significant differences among the three countries, mean CN increasing together with latitude. On the contrary, an inverse relation ( r = -1) was evidenced among the frequency of odd CNs and latitude. Our results show that the hypothesis of a polyploid increase proportional with distance from the Equator seems to be confirmed, when territories from the same hemisphere are compared.

• 出版日期2012