Generic relationships and dating of lineages in Winteraceae based on nuclear (ITS) and plastid (rpS16 and psbA-trnH) sequence data.

Full Abstract

Phylogenetic analyses of representative species from the five genera of Winteraceae (Drimys, Pseudowintera, Takhtajania, Tasmannia, and Zygogynum s.l.) were performed using ITS nuclear sequences and a combined data-set of ITS+psbA-trnH+rpS16 sequences (sampling of 30 and 15 species, respectively). Indel informativity using simple gap coding or gaps as a fifth character was examined in both data-sets. Parsimony and Bayesian analyses support the monophyly of Drimys, Tasmannia, and Zygogynum s.l., but do not support the monophyly of Belliolum, Zygogynum s.s., and Bubbia. Within Drimys, the combined data-set recovers two subclades. Divergence time estimates suggest that the splitting between Drimys and its sister clade (Pseudowintera+Zygogynum s.l.) occurred around the end of the Cretaceous; in contrast, the divergence between the two subclades within Drimys is more recent (15.5-18.5MY) and coincides in time with the Andean uplift. Estimates suggest that the earliest divergences within Winteraceae could have predated the first events of Gondwana fragmentation.

Author information

Author/s: Marquínez, Xavier (X); Lohmann, Lúcia G (LG); Salatino, Maria L Faria (ML); Salatino, Antonio (A); González, Favio (F);

Affiliation: Universidad Nacional de Colombia, Apartado Aéreo 7495, Bogotá DC, Colombia. xmarquinezc(-atsign-)unal.edu.co

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Molecular phylogenetics and evolution (Mol Phylogenet Evol), published in United States. (Language: eng)

Reference: 2009-Nov; vol 53 (issue 2) : pp 435-49

Dates: Created 2009/08/31; Completed 2009/10/14;

PMID: 19580880, status: MEDLINE (last retrieval date: 10/14/2009, IMS Date: )

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