Using plastid genome-scale data to resolve enigmatic relationships among basal angiosperms

Title:
Using plastid genome-scale data to resolve enigmatic relationships among basal angiosperms
Authors:
Moore, Michael J.; Bell, Charles D.; Soltis, Pamela S.; Soltis, Douglas E.
Abstract:
Although great progress has been made in clarifying deep-level angiosperm relationships, several early nodes in the angiosperm branch of the Tree of Life have proved difficult to resolve. Perhaps the last great question remaining in basal angiosperm phylogeny involves the branching order among the five major clades of mesangiosperms (Ceratophyllum, Chloranthaceae, eudicots, magnoliids, and monocots). Previous analyses have found no consistent support for relationships among these clades. In an effort to resolve these relationships, we performed phylogenetic analyses of 61 plastid genes (≈42,000 bp) for 45 taxa, including members of all major basal angiosperm lineages. We also report the complete plastid genome sequence of Ceratophyllum demersum. Parsimony analyses of combined and partitioned data sets varied in the placement of several taxa, particularly Ceratophyllum, whereas maximum-likelihood (ML) trees were more topologically stable. Total evidence ML analyses recovered a clade of Chloranthaceae + magnoliids as sister to a well supported clade of monocots + (Ceratophyllum + eudicots). ML bootstrap and Bayesian support values for these relationships were generally high, although approximately unbiased topology tests could not reject several alternative topologies. The extremely short branches separating these five lineages imply a rapid diversification estimated to have occurred between 143.8 ± 4.8 and 140.3 ± 4.8 Mya.
Citation:
Moore, M. J., C. D. Bell, P. S. Soltis, and D. E. Soltis. 2007. "Using plastid genome-scale data to resolve enigmatic relationships among basal angiosperms." Proceedings Of The National Academy Of Sciences Usa 104(49): 19363-19368.
DATE ISSUED:
2007
Department:
Biology
Type:
article
PUBLISHED VERSION:
10.1073/pnas.0708072104
PERMANENT LINK:
http://hdl.handle.net/11282/310342

Full metadata record

DC FieldValue Language
dc.contributor.authorMoore, Michael J.en_US
dc.contributor.authorBell, Charles D.en_US
dc.contributor.authorSoltis, Pamela S.en_US
dc.contributor.authorSoltis, Douglas E.en_US
dc.date.accessioned2013-12-23T16:30:57Zen
dc.date.available2013-12-23T16:30:57Zen
dc.date.issued2007en
dc.identifier.citationMoore, M. J., C. D. Bell, P. S. Soltis, and D. E. Soltis. 2007. "Using plastid genome-scale data to resolve enigmatic relationships among basal angiosperms." Proceedings Of The National Academy Of Sciences Usa 104(49): 19363-19368.en_US
dc.identifier.urihttp://hdl.handle.net/11282/310342en
dc.description.abstractAlthough great progress has been made in clarifying deep-level angiosperm relationships, several early nodes in the angiosperm branch of the Tree of Life have proved difficult to resolve. Perhaps the last great question remaining in basal angiosperm phylogeny involves the branching order among the five major clades of mesangiosperms (Ceratophyllum, Chloranthaceae, eudicots, magnoliids, and monocots). Previous analyses have found no consistent support for relationships among these clades. In an effort to resolve these relationships, we performed phylogenetic analyses of 61 plastid genes (≈42,000 bp) for 45 taxa, including members of all major basal angiosperm lineages. We also report the complete plastid genome sequence of Ceratophyllum demersum. Parsimony analyses of combined and partitioned data sets varied in the placement of several taxa, particularly Ceratophyllum, whereas maximum-likelihood (ML) trees were more topologically stable. Total evidence ML analyses recovered a clade of Chloranthaceae + magnoliids as sister to a well supported clade of monocots + (Ceratophyllum + eudicots). ML bootstrap and Bayesian support values for these relationships were generally high, although approximately unbiased topology tests could not reject several alternative topologies. The extremely short branches separating these five lineages imply a rapid diversification estimated to have occurred between 143.8 ± 4.8 and 140.3 ± 4.8 Mya.en_US
dc.identifier.doi10.1073/pnas.0708072104en
dc.subject.departmentBiologyen_US
dc.titleUsing plastid genome-scale data to resolve enigmatic relationships among basal angiospermsen_US
dc.typearticleen_US
dc.identifier.journalProceedings Of The National Academy Of Sciences USAen_US
dc.subject.keywordCeratophyllumen_US
dc.subject.keywordMolecular datingen_US
dc.subject.keywordPhylogeneticsen_US
dc.subject.keywordMesangiospermsen_US
dc.identifier.volume104en_US
dc.identifier.issue49en_US
dc.identifier.startpage19363en_US
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