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Insights into polyploid evolution, repid radiation and extensive gene flow in Dinaric taxa of the genus Knautia (Caprifoliaceae)

Recent research within the genus Knautia revealed a shallow genetic structure with mostly low resolution and only partial congruence between plastid and nuclear datasets possibly due to recent rapid diversification and still ongoing hybridisation among different taxa. One of the revealed groups is an assemblage of several closely related taxa with distribution area restricted to Croatia and Bosnia and Herzegovina. The members of this group were previously assigned to the K. dalmatica and K. velutina groups. The aim of this research was to elucidate the relationships between the mentioned taxa as well as to answer the question, which taxa do really occur in the Dinaric Mountains. Ploidy- level screening of all investigated taxa revealed multiple cytotypes (di-, tetra- and/or hexaploids) within most of the taxa as well as similarity of genome sizes across different taxa belonging to the same ploidy level, with the exception of few populations with divergent genome size.

Knautia, Dinaric mountains, AFLP, genome size, phylogeography

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