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Título : Phylogeny of subtribe Artemisiinae (Asteraceae, Anthemideae) based on the sequences of nuclear ribosomal DNA internal transcribed spacers (ITS): relationships with cytogenetic and palynological data
Autor : Vallès, Joan; Torrell, M.; Martín, Joan; Sanz, María; Garcia, Sònia; Garnatje, Teresa; Garcia-Jacas, Núria; Vilatersana, Roser; Susanna de la Serna, Alfonso
Fecha de publicación : 2003
Editor: Swedish Museum of Natural History
Citación : Compositae Newsletter 40: 37-38 (2003).
Resumen: Sequences of the internal transcribed spacers (ITSl and ITS2) of nuclear ribosomal DNA were analysed for 44 Artemisia species (46 populations) representing all the five classical subgenera and the geographical range of the genus, 1 1 species from 10 genera closely related to Artemisia, and six outgroup species from five other genera of the Anthemideae. The results definitely support the monophyly of the genus Artemisia in its broadest sense (including some taxa segregated as independent genera, like Oligosporus and Seriphidium). Eight main clades are estabUshed within Artemisia: they partly agree with the classical subdivision of the genus, but they also suggest that some infrageneric groups must be redefined, especially the subgenus Artemisia. The subgenera Tridentatae and Seriphidium are independent from each other; cytogenetic data also support this statement. Some of the satellite genera are clearly placed within Artemisia {Artemisiastrum, Filifolium, Mausolea,Picrothamnus. Sphaewmeha, Turaniphytum), whereas some others fall outside the large clade formed by tliis genus {Brachanthemum, Elachanthemum, Hippolytia, Kaschgaria). These results, correlated to other data, such as pollen morphology, allow us to conclude that the subtribe Artemisiinae as currently defined is a very heterogeneous group. Affinities of the largest genus of the subtribe and tribe, Artemisia, and of other genera ofthe subtribe to some genera from other subtribes of the Anthemideae (Tanacetinae, Handehinae) indicate that subtribe Artemisiinae needs a deep revision and redefinition. Phylogenetic utihty of region tmL-F of the plastid DNA was also evaluated; sequences ofthe trnL-F region inArtemisia do not provide phylogenetic information.
Descripción : 2 pages.--The International Compositae Alliance (TICA): First International Meeting Pretoria, 2003.
Versión del editor: http://www.biodiversitylibrary.org/item/48868#38
URI : http://hdl.handle.net/10261/5809
ISSN: 0284-8422
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