Abstract
Phylogenetic relationships in Primulaceae were investigated by analysis of nuclear rDNA ITS sequences. Thirty-four species of Primulaceae, two of Myrsinaceae and four outgroup taxa were analyzed. In accordance to the results of recently published papers on the phylogeny of Primulaceae we found the family to be paraphyletic and resolved the positions of some genera. Our results show (a) the rather basal position of Centunculus within Lysimachieae, the genus thus being rather distantly related to Anagallis, (b) the close relationship between Lysimachia sect. Lerouxia, Anagallis, Asterolinon, and Pelletiera, (c) the well-supported monophyly of a group consisting of the four genera Hottonia, Omphalogramma, Bryocarpum, and Soldanella, and (d) the affinity of Stimpsonia to the Myrsinaceae-Lysimachieae-Ardisiandra clade. The ITS sequence data do not provide sufficient information to resolve basal relationships within the Primulaceae s.l. There is evidence against the monophyly of the large genera Primula, Androsace, and Lysimachia. In contrast to the phylogenetic reconstructions based on plastid gene sequences, Cyclamen does not appear as a member of the Myrsinaceae-Lysimachieae clade, but its position remains unclear.
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