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Citation for Study 12174

Citation title: "Phylogeny of Cercis based on DNA sequences of nuclear ITS and four plastid regions: implications for transatlantic historical bioegeography".

Study name: "Phylogeny of Cercis based on DNA sequences of nuclear ITS and four plastid regions: implications for transatlantic historical bioegeography".

This study is part of submission 12174 (Status: Published).

Citation

Fritsch P.W., & Cruz B.C. 2012. Phylogeny of Cercis based on DNA sequences of nuclear ITS and four plastid regions: implications for transatlantic historical bioegeography. Molecular Phylogenetics and Evolution, .

Authors

• Fritsch P.W.
• Cruz B.C.

Abstract

The disjunct genus Cercis has been used to test models of Northern Hemisphere historical biogeography. Previous phylogenetic estimates employing DNA sequences of the ITS region and (in one study) those of ndhF recovered a well supported clade of North American and western Eurasian species that was nested within a paraphyletic group of Chinese species. Resolution and clade support within the tree were otherwise low and the monophyly of C. canadensis was uncertain. Here we conduct a phylogenetic analysis of Cercis with a higher number of regions (ITS, ndhF, rpoB-trnC, trnT-trnD, and trnS-trnG) and samples than in previous studies. Results corroborate the initial divergence between the Chinese species C. chingii and the rest of the genus. Support is newly found both for a clade of the two North American species as sister to the western Eurasian species, and for the monophyly of C. canadensis. As in a previous study, divergence between North American and western Eurasian Cercis was estimated as mid-Miocene (ca. 13 million years ago), and the ancestor in which this divergence occurred was inferred to be xerophytic. Contrary to previous studies, however, our data infer strictly east-to-west vicariance, with the western Eurasian species diverging prior to the split between eastern and western North American Cercis. The timing of the transatlantic divergence in Cercis is too recent to be explained by a postulated continuous belt of semi-arid vegetation between North America and Europe in the Paleogene, suggesting instead the presence of a Miocene North Atlantic corridor for semi-arid plants. In the absence of strong evidence from other sources, the possibility that Cercis has been able to quickly adapt from mesophytic antecedents to semi-arid conditions whenever the latter have arisen in the Northern Hemisphere can be considered a plausible alternative, although parsimony optimization renders this scenario two steps longer.

Keywords

aridity, biogeography, Cercis, character evolution, Northern Hemisphere, Tertiary relicts

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S12174
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref20257,
  	 author = {Peter W. Fritsch and Boni C. Cruz},
  	 title = {Phylogeny of Cercis based on DNA sequences of nuclear ITS and four plastid regions: implications for transatlantic historical bioegeography},
  	 year = {2012},
  	 keywords = {aridity, biogeography, Cercis, character evolution, Northern Hemisphere, Tertiary relicts},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Molecular Phylogenetics and Evolution},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {The disjunct genus Cercis has been used to test models of Northern Hemisphere historical biogeography. Previous phylogenetic estimates employing DNA sequences of the ITS region and (in one study) those of ndhF recovered a well supported clade of North American and western Eurasian species that was nested within a paraphyletic group of Chinese species. Resolution and clade support within the tree were otherwise low and the monophyly of C. canadensis was uncertain. Here we conduct a phylogenetic analysis of Cercis with a higher number of regions (ITS, ndhF, rpoB-trnC, trnT-trnD, and trnS-trnG) and samples than in previous studies. Results corroborate the initial divergence between the Chinese species C. chingii and the rest of the genus. Support is newly found both for a clade of the two North American species as sister to the western Eurasian species, and for the monophyly of C. canadensis. As in a previous study, divergence between North American and western Eurasian Cercis was estimated as mid-Miocene (ca. 13 million years ago), and the ancestor in which this divergence occurred was inferred to be xerophytic. Contrary to previous studies, however, our data infer strictly east-to-west vicariance, with the western Eurasian species diverging prior to the split between eastern and western North American Cercis. The timing of the transatlantic divergence in Cercis is too recent to be explained by a postulated continuous belt of semi-arid vegetation between North America and Europe in the Paleogene, suggesting instead the presence of a Miocene North Atlantic corridor for semi-arid plants. In the absence of strong evidence from other sources, the possibility that Cercis has been able to quickly adapt from mesophytic antecedents to semi-arid conditions whenever the latter have arisen in the Northern Hemisphere can be considered a plausible alternative, although parsimony optimization renders this scenario two steps longer.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 20257
  AU  - Fritsch,Peter W.
  AU  - Cruz,Boni C.
  T1  - Phylogeny of Cercis based on DNA sequences of nuclear ITS and four plastid regions: implications for transatlantic historical bioegeography
  PY  - 2012
  KW  - aridity
  KW  - biogeography
  KW  - Cercis
  KW  - character evolution
  KW  - Northern Hemisphere
  KW  - Tertiary relicts
  UR  - http://dx.doi.org/
  N2  - The disjunct genus Cercis has been used to test models of Northern Hemisphere historical biogeography. Previous phylogenetic estimates employing DNA sequences of the ITS region and (in one study) those of ndhF recovered a well supported clade of North American and western Eurasian species that was nested within a paraphyletic group of Chinese species. Resolution and clade support within the tree were otherwise low and the monophyly of C. canadensis was uncertain. Here we conduct a phylogenetic analysis of Cercis with a higher number of regions (ITS, ndhF, rpoB-trnC, trnT-trnD, and trnS-trnG) and samples than in previous studies. Results corroborate the initial divergence between the Chinese species C. chingii and the rest of the genus. Support is newly found both for a clade of the two North American species as sister to the western Eurasian species, and for the monophyly of C. canadensis. As in a previous study, divergence between North American and western Eurasian Cercis was estimated as mid-Miocene (ca. 13 million years ago), and the ancestor in which this divergence occurred was inferred to be xerophytic. Contrary to previous studies, however, our data infer strictly east-to-west vicariance, with the western Eurasian species diverging prior to the split between eastern and western North American Cercis. The timing of the transatlantic divergence in Cercis is too recent to be explained by a postulated continuous belt of semi-arid vegetation between North America and Europe in the Paleogene, suggesting instead the presence of a Miocene North Atlantic corridor for semi-arid plants. In the absence of strong evidence from other sources, the possibility that Cercis has been able to quickly adapt from mesophytic antecedents to semi-arid conditions whenever the latter have arisen in the Northern Hemisphere can be considered a plausible alternative, although parsimony optimization renders this scenario two steps longer.
  L3  - 
  JF  - Molecular Phylogenetics and Evolution
  VL  - 
  IS  - 
  ER  -