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Citation for Study 2027

Citation title: "On the generic circumscription of Gonolobus (Apocynaceae, Asclepiadoideae): Evidence from molecules and morphology".

This study was previously identified under the legacy study ID S2021 (Status: Published).

Citation

Krings A., Thomas D., & Xiang Q. 2008. On the generic circumscription of Gonolobus (Apocynaceae, Asclepiadoideae): Evidence from molecules and morphology. Systematic Botany, 33(2).

Authors

• Krings A.
• Thomas D.
• Xiang Q.

Abstract

Gonolobus (Apocynaceae, Asclepiadoideae) is a New World genus comprising an estimated 100150 species. The degree of variation in estimated species numbers is largely the result of still poorly known tropical taxa and differences regarding generic limits. Characters historically used to delimit genera such as Gonolobus within Gonolobinaesuch as laminar dorsal anther appendages and various follicle morphologieshave been controversial and their evolution remains unknown, not having been explored in a phylogenetic framework. The primary objectives of the current study were to (1) test the monophyly of Gonolobus sensu Woodson in the context of a phylogeny of New World Asclepiadeae and (2) explore the evolution of laminar dorsal anther appendages and winged follicles with respect to their potential utility in generic circumscription. Chloroplast (trnL-F, rps16) data are newly presented for sixty-three taxa of Gonolobinae, representing an increased sampling of the subtribe from a maximum of seven taxa in prior studies. These data were combined with a previously published dataset to form a 183 taxa matrix of New World Asclepiadeae. Nuclear (LEAFY) data were newly generated for forty-nine taxa of Gonolobinae. Evidence from parsimony and Bayesian analyses of chloroplast and nuclear data presented here supports the monophyly of both the subtribe and the genus Gonolobus in a narrow or broad sense. Laminar dorsal anther appendages are restricted to Gonolobus s.l. or s.s., although parsimony remains equivocal on whether they evolved once or twice. A transversion in the trnL-F spacer is shown synapomorphic for Gonolobus s.s. Two indels in LEAFY, as well as winged follicles, are shown synapomorphic for Gonolobus s.l.

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S2027
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref16198,
  	 author = {Alexander  Krings and D. T.  Thomas and Q. Y.  Xiang},
  	 title = {On the generic circumscription of Gonolobus (Apocynaceae, Asclepiadoideae): Evidence from molecules and morphology},
  	 year = {2008},
  	 keywords = {},
  	 doi = {},
  	 url = {},
  	 pmid = {},
  	 journal = {Systematic Botany},
  	 volume = {33},
  	 number = {2},
  	 pages = {},
  	 abstract = {Gonolobus (Apocynaceae, Asclepiadoideae) is a New World genus comprising an estimated 100150 species. The degree of variation in estimated species numbers is largely the result of still poorly known tropical taxa and differences regarding generic limits. Characters historically used to delimit genera such as Gonolobus within Gonolobinaesuch as laminar dorsal anther appendages and various follicle morphologieshave been controversial and their evolution remains unknown, not having been explored in a phylogenetic framework. The primary objectives of the current study were to (1) test the monophyly of Gonolobus sensu Woodson in the context of a phylogeny of New World Asclepiadeae and (2) explore the evolution of laminar dorsal anther appendages and winged follicles with respect to their potential utility in generic circumscription. Chloroplast (trnL-F, rps16) data are newly presented for sixty-three taxa of Gonolobinae, representing an increased sampling of the subtribe from a maximum of seven taxa in prior studies. These data were combined with a previously published dataset to form a 183 taxa matrix of New World Asclepiadeae. Nuclear (LEAFY) data were newly generated for forty-nine taxa of Gonolobinae. Evidence from parsimony and Bayesian analyses of chloroplast and nuclear data presented here supports the monophyly of both the subtribe and the genus Gonolobus in a narrow or broad sense. Laminar dorsal anther appendages are restricted to Gonolobus s.l. or s.s., although parsimony remains equivocal on whether they evolved once or twice. A transversion in the trnL-F spacer is shown synapomorphic for Gonolobus s.s. Two indels in LEAFY, as well as winged follicles, are shown synapomorphic for Gonolobus s.l.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 16198
  AU  - Krings,Alexander 
  AU  - Thomas,D. T. 
  AU  - Xiang,Q. Y. 
  T1  - On the generic circumscription of Gonolobus (Apocynaceae, Asclepiadoideae): Evidence from molecules and morphology
  PY  - 2008
  KW  - 
  UR  - 
  N2  - Gonolobus (Apocynaceae, Asclepiadoideae) is a New World genus comprising an estimated 100150 species. The degree of variation in estimated species numbers is largely the result of still poorly known tropical taxa and differences regarding generic limits. Characters historically used to delimit genera such as Gonolobus within Gonolobinaesuch as laminar dorsal anther appendages and various follicle morphologieshave been controversial and their evolution remains unknown, not having been explored in a phylogenetic framework. The primary objectives of the current study were to (1) test the monophyly of Gonolobus sensu Woodson in the context of a phylogeny of New World Asclepiadeae and (2) explore the evolution of laminar dorsal anther appendages and winged follicles with respect to their potential utility in generic circumscription. Chloroplast (trnL-F, rps16) data are newly presented for sixty-three taxa of Gonolobinae, representing an increased sampling of the subtribe from a maximum of seven taxa in prior studies. These data were combined with a previously published dataset to form a 183 taxa matrix of New World Asclepiadeae. Nuclear (LEAFY) data were newly generated for forty-nine taxa of Gonolobinae. Evidence from parsimony and Bayesian analyses of chloroplast and nuclear data presented here supports the monophyly of both the subtribe and the genus Gonolobus in a narrow or broad sense. Laminar dorsal anther appendages are restricted to Gonolobus s.l. or s.s., although parsimony remains equivocal on whether they evolved once or twice. A transversion in the trnL-F spacer is shown synapomorphic for Gonolobus s.s. Two indels in LEAFY, as well as winged follicles, are shown synapomorphic for Gonolobus s.l.
  L3  - 
  JF  - Systematic Botany
  VL  - 33
  IS  - 2
  ER  -