11674868

Source:http://linkedlifedata.com/resource/pubmed/id/11674868

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0015219, umls-concept:C0330208, umls-concept:C1148543
pubmed:issue	1482
pubmed:dateCreated	2001-10-24
pubmed:abstractText	Growing evidence of morphological diversity in angiosperm flowers, seeds and pollen from the mid Cretaceous and the presence of derived lineages from increasingly older geological deposits both imply that the timing of early angiosperm cladogenesis is older than fossil-based estimates have indicated. An alternative to fossils for calibrating the phylogeny comes from divergence in DNA sequence data. Here, angiosperm divergence times are estimated using non-parametric rate smoothing and a three-gene dataset covering ca. 75% of all angiosperm families recognized in recent classifications. The results provide an initial hypothesis of angiosperm diversification times. Using an internal calibration point, an independent evaluation of angiosperm and eudicot origins is performed. The origin of the crown group of extant angiosperms is indicated to be Early to Middle Jurassic (179-158 Myr), and the origin of eudicots is resolved as Late Jurassic to mid Cretaceous (147-131 Myr). Both estimates, despite a conservative calibration point, are older than current fossil-based estimates.
pubmed:commentsCorrections	http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-10037598, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-10542147, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-10586878, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-10586879, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-12118410, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-17753776, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-17771888, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-17833420, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-2762323, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-3934395, http://linkedlifedata.com/resource/pubmed/commentcorrection/11674868-8095691
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/101245157
pubmed:citationSubset	IM
pubmed:chemical	http://linkedlifedata.com/resource/pubmed/chemical/RNA, Ribosomal, 18S, http://linkedlifedata.com/resource/pubmed/chemical/RbcL protein, plastid, http://linkedlifedata.com/resource/pubmed/chemical/Ribulose-Bisphosphate Carboxylase
pubmed:status	MEDLINE
pubmed:month	Nov
pubmed:issn	0962-8452
pubmed:author	pubmed-author:ChaseM WMW, pubmed-author:SavolainenVV, pubmed-author:WikströmNN
pubmed:issnType	Print
pubmed:day	7
pubmed:volume	268
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	2211-20
pubmed:dateRevised	2010-9-14
pubmed:meshHeading	pubmed-meshheading:11674868-Angiosperms, pubmed-meshheading:11674868-Calibration, pubmed-meshheading:11674868-Evolution, Molecular, pubmed-meshheading:11674868-RNA, Ribosomal, 18S, pubmed-meshheading:11674868-Ribulose-Bisphosphate Carboxylase
pubmed:year	2001
pubmed:articleTitle	Evolution of the angiosperms: calibrating the family tree.
pubmed:affiliation	Department of Botany, The Natural History Museum, Cromwell Road, London SW7 5BD, UK. N.Wikstrom@nhm.ac.uk
pubmed:publicationType	Journal Article, Research Support, Non-U.S. Gov't