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Relationships among genera in Saniculoideae and selected Apioideae (Umbelliferae) inferred from nrITS sequences
Author(s) -
Valiejo-Roman Carmen M.,
Terentieva Elena I.,
Samigullin Tagir H.,
Pimenov Michael G.
Publication year - 2002
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1554966
Subject(s) - biology , maximum parsimony , subfamily , botany , clade , phylogenetic tree , paraphyly , genetics , gene
The internal transcribed spacers (ITS1 and ITS2) of 18S26S 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 neighborjoining, 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 HydrocotyleAraliaceae clade; (3) Dickinsia is very distant from phenetically similar Hydrocotyle , falling within a large cluster of Apioideae, but also including Lagoecia and Naufraga .