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Relationships among genera in Saniculoideae and selected Apioideae (Umbelliferae) inferred from nrITS sequences

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The internal transcribed spacers (ITS1 and ITS2) of 18S-26S nuclear ribosomal DNA were newly sequenced for eight species of Umbelliferae (six species from subfamily Saniculoideae: Actinolema macrolema, Astrantia minor, Eryngium giganteum, E. coeruleum, Hacquetia epipactis, and Lagoecia cuminoides, two species from subfamily Hydrocotyloideae: Dickinsia hydrocotyloides and Azorella trifurcata), as well as Hohenackeria exscapa, a species of uncertain position in the family. Phylogenetic analyses of new data, plus previously reported sequences of 52 other species using neighbor-joining, maximum parsimony, and maximum likelihood methods yielded similar results: (1) Actinolema is sister to Astrantia corresponding to Drude's treatments; (2) in Astrantia, molecular divergence is revealed between sects. Astrantiella (A. minor) and Astrantia (A. major, A. maxima); (3) Eryngium appears to be paraphyletic; (4) Hacquetia might be treated as a part of Sanicula; and (5) Lagoecia is very distant from all other Saniculoideae and close to some genera of Apioideae. Our results correspond to matK data previously published: (1) Hohenackeria forms a clade with Bupleurum, in a position near the base of the Apioideae tree; (2) Azorella is sister to a large cluster uniting all Saniculoideae and Apioideae, being slightly closer to them than to the Hydrocotyle-Araliaceae clade; (3) Dickinsia is very distant from phenetically similar Hydrocotyle, falling within a large cluster of Apioideae, but also including Lagoecia and Naufraga.
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Document Type: Research Article

Affiliations: 1: Department of Evolutionary Biochemistry, A.N. Belozersky Institute, Moscow State University, Moscow 119899, Russia 2: Botanical Garden, Moscow State University, Moscow 119899, Russia

Publication date: 2002-02-01

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