163770 20260112133138.0 doi 10.1093/botlinnean/boy013 sideral 107199 ART-2018-107199 eng Viruel, J. (orcid)0000-0001-5658-8411 A nuclear Xdh phylogenetic analysis of yams (Dioscorea: Dioscoreaceae) congruent with plastid trees reveals a new Neotropical lineage 2018 Due to its economic value and evolutionary importance among monocots and Dioscoreales, Dioscorea has been extensively studied phylogenetically. All analyses have produced congruent results resolving ten consistent main clades but were based solely on plastid data. Here we present the first phylogenetic tree of Dioscorea based on a lowcopy nuclear gene, xanthine dehydrogenase (Xdh). The Xdh topology and the divergence order of the main Dioscorea clades are congruent with those of the plastid-based trees, showing an early diverging position of Stenophora, followed by those of the two New World clades (NW I, NW II) and a still unresolved relationship between the African and Mediterranean clades plus D. tentaculigera. Subsequent branches include a more recently evolved clade B of Dioscorea comprising all cultivated species, the well-supported Malagasy, compound-leaved (CL) and Rajania clades and a clade composed of mixed Birmanica and Enantiophyllum accessions. We also identified a more recently evolved New World clade (NW III), represented by D. anomala, nested in clade B. info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.057 2018 PLANT SCIENCES 46 / 226 = 0.204 2018 Q1 T1 1.394 2018 Plant Science 2018 Q1 Ecology, Evolution, Behavior and Systematics 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Forest, F. Paun, O. Chase, M.W. Devey, D. Couto, R.S. Segarra-Moragues, J.G. Catalán, P. Universidad de Zaragoza (orcid)0000-0001-7793-5259 Wilkin, P. 5011 063 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Botánica 187, 2 (2018), 232-246 Bot. j. Linn. Soc. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 0024-4074 542481 http://zaguan.unizar.es/record/163770/files/texto_completo.pdf Versión publicada 2800694 http://zaguan.unizar.es/record/163770/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:163770 articulos driver 2026-01-12-12:35:12 ARTICLE