
handle: 10261/29764
[ES] El nuevo esquema de las relaciones en las ramas basales de la familia Compositae Giseke ha confirmado que el grupo hermano de la tribu Cardueae Cass. no es la tribu Mutisieae Cass., sino ma´s bien un grupo de ge´neros africanos que ahora se clasifican como tribu Tarchonantheae Kostel. Este cambio implica que la monofilia de las Cardueae establecida sobre bases moleculares debe confirmarse. Adema´s, nuestras nuevas recolecciones en los u´ ltimos an˜os hacen que nuestro muestreo se extienda a 70 de los 74 ge´neros de la tribu. Hemos llevado a cabo un nuevo estudio molecular de la tribu usando una regio´n nuclear (ITS) y dos cloropla´sticas, adema´s de seleccionar un grupo externo ma´s adecuado. Nuestros resultados confirman que las Cardueae son un grupo natural, pero aconsejan algunos cambios en la delimitacio´n subtribal: el reconocimiento de la subtribu Cardopatiinae Less. y el cambio de algunos ge´neros a otras subtribus (Myopordon Boiss., Nikitinia Iljin, Syreitschikovia Pavlov y el grupo Xeranthemum L.). Presentamos tambie´n una recapitulacio´n sobre ciertas cuestiones interesantes que quedan sin resolver en la clasificacio´n de algunos grandes ge´neros.
[EN]The new outline of relationships in basal branches of the family Compositae Giseke confirms that the sister group to the tribe Cardueae Cass. are not Mutisieae Cass., but rather a group of African genera now classified as the tribe Tarchonantheae Kostel. This change implies that the monophyly of the Cardueae must be reassessed on a molecular basis. Moreover, new collections in recent years allow us to extend our sampling to 70 of the 74 genera of the tribe. We performed a new molecular study of the tribe using one nuclear region (ITS) and two chloroplastic markers (trnL-trnF and matK) in addition to a more appropriate outgroup. Our results confirm that the Cardueae is a natural group but indicate some changes in subtribal delineation: the subtribe Cardopatiinae Less. is recognized and some genera are moved to other subtribes (Myopordon Boiss., Nikitinia Iljin, Syreitschikovia Pavlov, and the Xeranthemum L. group). A recapitulation of a number of interesting questions that remain unresolved in the classification of some large genera is presented.
Peer reviewed
22 p.
Tribal delimitation, Cardueae, Compositae, matK, trnL-trnF, ITS, Genus delineation, Phylogeny
Tribal delimitation, Cardueae, Compositae, matK, trnL-trnF, ITS, Genus delineation, Phylogeny
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