Towards resolving the Knautia arvensis agg. (Dipsacaceae) puzzle: primary and secondary contact zones and ploidy segregation at landscape and microgeographic scales

摘要: Background and Aims Detailed knowledge of variations in ploidy levels their geographic distributions is one the key tasks faced polyploid research natural systems. Flow cytometry has greatly facilitated field cytogeography by allowing characterization at both regional population scale, multiple stages life cycle. In present study, flow was employed to investigate patterns dynamics variation taxonomically challenging complex Knautia arvensis (Dipsacaceae) some its allies (K. dipsacifolia, K. slovaca) Central Europe.