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Title

Generic delimitation and biogeographic history of the complex Carthamus - Carduncellus (Cardueae, Compositae)

AuthorsVilatersana, Roser ; Calleja, Juan A.; Garcia-Jacas, Núria ; Susanna de la Serna, Alfonso
Issue DateJul-2017
CitationXIX International Botanical Congress (IBC 2017)
AbstractThe complex Carthamus-Carduncellus (Cardueae, Compositae) is formed by aproximally 60 taxa widely distributed throughout the Mediterranenan basin and western Asia. Generic delineation in the complex has been always controversial. The three main taxonomical proposals are (1) the complex is formed by a single genus Carthamus, as suggested by Greuter (2003), (2) two genera, Carduncellus and Carthamus, as proposed by López González (2012); and (3) four genera, Carduncellus, Carthamus, Femeniasia and Phonus, by Vilatersana et al., (2000). Our major aim is to provide a robust and comprehensive systematic proposal for the complex Carthamus-Carduncellus. To do so, we face the specific goals: (1) to build nuclear and plastid phylogenies encompassing most of the richness of all the putative genera; (2) to propose and test the generic delimitation of the complex and, (3) to infer the biogeographic history of the complex by estimating divergence times and ancestral distribution areas and lineages. To address these issues, we constructed a phylogeny with a nearly-complete taxon sampling based on two nuclear regions (ITS and 3¿ETS) and four plastid regions (5¿trnT-trnL rpl32-trnL, trnH-psbA, and 3¿ndhF). For the generic delimitation, we used both cpDNA and nrDNA datasets, we discussed the incongruence between both datasets, and we tested the three hypothesis on the systematic of the complex Carthamus-Carduncellus by using the ¿taxa delimitations¿ tool implemented in Beast. We used the nrDNA dataset because of its greater resolution for dating and biogeographic analysis performed with BEAST and BioGeoBears. The discussion is complemented with morphological and kariological data.
DescriptionPóster presentado al XIX International Botanical Congress (IBC 2017), celebrado del 23 al 29 de julio de 2017, en Shenzhen, China
URIhttp://www.ibc2017.cn/Download/
http://hdl.handle.net/10261/157357
Appears in Collections:(IBB) Comunicaciones congresos
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