Systematics/Phytogeography / Taxonomie/ Section
Harpke, Doerte , Kerndorff, Helmut , Blattner, Frank R. .
Phylogenetic relationships within Crocus (Iridaceae) based on ITS sequences of nuclear rDNA.
The genus Crocus consists of about 80 species and has an entire Old World distribution. Species occur from Western Europe to western China, with the center of diversity on the Balkan Peninsula and in Turkey. Morphologically, this genus is well characterized. Our study focuses on clarifying phylogenetic relationships and taxonomy within the genus, as a prerequisite for phylogeographic analyses within species and species groups. Sequences of the nuclear ribosomal DNA ITS region of about 70 species representing both subgenera and all sections and series were analyzed together with the outgroup taxa Homeria and Romulea.
Phylogenetic analyses revealed that the genus Crocus is monophyletic. The split into two subgenera Crocus and Crociris (with its sole member C. banaticus) was not supported. The division into two sections within subgenus Crocus was mainly supported by our phylogenetic analyses. In contrast, the series of the sections were found to be mostly poly- and/or paraphylethic, and the C. biflorus species group, thought to be close relatives, appeared divided in three different monophyletic units.
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1 - Institute of Plant Genetics and Crop Research (IPK), Taxonomy & Evol. Biology, Gatersleben, D-06466, Germany
2 - Sundgauer Str. 144, Berlin, D-14167, Germany
Presentation Type: Poster:Posters for Sections
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM