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Citation for Study 14891

Citation title: "On the systematic position of some Asian enigmatic Asclepiadoideae (Apocynaceae) genera".

Study name: "On the systematic position of some Asian enigmatic Asclepiadoideae (Apocynaceae) genera".

This study is part of submission 14891 (Status: Published).

Citation

Surveswaran S., Sun M., Grimm G., & Liede-schumann S. 2014. On the systematic position of some Asian enigmatic Asclepiadoideae (Apocynaceae) genera. Botanical Journal of the Linnean Society, 174: 601?619.

Authors

• Surveswaran S.
• Sun M.
• Grimm G.
• Liede-schumann S.

Abstract

Phylogenetic structure of Asclepiadoideae (Apocynaceae) has been elucidated at the tribal and subtribal levels in the last two decades. However, to date the systematic positions of seven Asian genera, Cosmostigma, Graphistemma, Holostemma, Pentasachme, Raphistemma, Seshagiria, and Treutlera have not been investigated. In this study, we examine evolutionary relationships among these seven small enigmatic Asian genera and clarify their positions in the known phylogeny of Asclepiadoideae, using a combination of plastid sequences of rbcL, rps16, trnL and trnL-F regions. Cosmostigma and Treutlera are resolved as members of the non-Hoya clade of Marsdenieae (maximum parsimony bootstrap support value BSMP = 96, maximum likelihood bootstrap support value BSML = 98, Bayesian-inferred posterior probability PP = 1.0), Pentasachme as sister of Stapeliinae in Ceropegieae (BSMP = 64, BSML = 66, PP = 0.94). Graphistemma, Holostemma, Raphistemma, and Seshagiria all belong to the Asclepiadeae-Cynanchinae (BSMP = 97, BSML = 100, PP = 1.0). The study confirms the generally accepted tribal and subtribal structure of the subfamily. One exception is Eustegia minuta, which is here placed as sister to all Asclepiadeae (BSMP = 58, BSML = 76, PP = 0.99) and not as sister to (Marsdenieae+Ceropegieae). The low support and conflicting position indicate the need for a placement of the genus as an independent tribe. In Asclepiadeae, a sister group position of Cynanchinae to (Asclepiadinae+Tylophorinae) is favored (BSMP = 57, BSML = 74, PP = 0.99), while Schizostephanus is retrieved as unresolved. Oxystelma takes a position at the base of Asclepiadinae (BSMP = 52, BSML = 74, PP = 0.69). Calciphila and Solenostemma are associated with Asclepiadinae with low support (BSMP = 37, BSML = 45, PP = 0.79), but all alternative positions are essentially without support. The position of Indian Asclepiadoideae in the family phylogeny is discussed.

Keywords

: Asclepiadoideae, classification, Chloroplast DNA, India, phylogeny, rbcL, rps16, systematics, trnL, trnL-F

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S14891
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref22525,
  	 author = {Siddharthan  Surveswaran and Mei  Sun and Guido  Grimm and Sigrid  Liede-Schumann},
  	 title = {On the systematic position of some Asian enigmatic Asclepiadoideae (Apocynaceae) genera},
  	 year = {2014},
  	 keywords = {: Asclepiadoideae, classification, Chloroplast DNA, India, phylogeny, rbcL, rps16, systematics, trnL, trnL-F},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Botanical Journal of the Linnean Society},
  	 volume = {174},
  	 number = {},
  	 pages = {601?619},
  	 abstract = {Phylogenetic structure of Asclepiadoideae (Apocynaceae) has been elucidated at the tribal and subtribal levels in the last two decades. However, to date the systematic positions of seven Asian genera, Cosmostigma, Graphistemma, Holostemma, Pentasachme, Raphistemma, Seshagiria, and Treutlera have not been investigated. In this study, we examine evolutionary relationships among these seven small enigmatic Asian genera and clarify their positions in the known phylogeny of Asclepiadoideae, using a combination of plastid sequences of rbcL, rps16, trnL and trnL-F regions. Cosmostigma and Treutlera are resolved as members of the non-Hoya clade of Marsdenieae (maximum parsimony bootstrap support value BSMP = 96, maximum likelihood bootstrap support value BSML = 98, Bayesian-inferred posterior probability PP = 1.0), Pentasachme as sister of Stapeliinae in Ceropegieae (BSMP = 64, BSML = 66, PP = 0.94). Graphistemma, Holostemma, Raphistemma, and Seshagiria all belong to the Asclepiadeae-Cynanchinae (BSMP = 97, BSML = 100, PP = 1.0). The study confirms the generally accepted tribal and subtribal structure of the subfamily. One exception is Eustegia minuta, which is here placed as sister to all Asclepiadeae (BSMP = 58, BSML = 76, PP = 0.99) and not as sister to (Marsdenieae+Ceropegieae). The low support and conflicting position indicate the need for a placement of the genus as an independent tribe. In Asclepiadeae, a sister group position of Cynanchinae to (Asclepiadinae+Tylophorinae) is favored (BSMP = 57, BSML = 74, PP = 0.99), while Schizostephanus is retrieved as unresolved. Oxystelma takes a position at the base of Asclepiadinae (BSMP = 52, BSML = 74, PP = 0.69). Calciphila and Solenostemma are associated with Asclepiadinae with low support (BSMP = 37, BSML = 45, PP = 0.79), but all alternative positions are essentially without support. The position of Indian Asclepiadoideae in the family phylogeny is discussed.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 22525
  AU  - Surveswaran,Siddharthan 
  AU  - Sun,Mei 
  AU  - Grimm,Guido 
  AU  - Liede-Schumann,Sigrid 
  T1  - On the systematic position of some Asian enigmatic Asclepiadoideae (Apocynaceae) genera
  PY  - 2014
  KW  - : Asclepiadoideae
  KW  - classification
  KW  - Chloroplast DNA
  KW  - India
  KW  - phylogeny
  KW  - rbcL
  KW  - rps16
  KW  - systematics
  KW  - trnL
  KW  - trnL-F
  UR  - http://dx.doi.org/
  N2  - Phylogenetic structure of Asclepiadoideae (Apocynaceae) has been elucidated at the tribal and subtribal levels in the last two decades. However, to date the systematic positions of seven Asian genera, Cosmostigma, Graphistemma, Holostemma, Pentasachme, Raphistemma, Seshagiria, and Treutlera have not been investigated. In this study, we examine evolutionary relationships among these seven small enigmatic Asian genera and clarify their positions in the known phylogeny of Asclepiadoideae, using a combination of plastid sequences of rbcL, rps16, trnL and trnL-F regions. Cosmostigma and Treutlera are resolved as members of the non-Hoya clade of Marsdenieae (maximum parsimony bootstrap support value BSMP = 96, maximum likelihood bootstrap support value BSML = 98, Bayesian-inferred posterior probability PP = 1.0), Pentasachme as sister of Stapeliinae in Ceropegieae (BSMP = 64, BSML = 66, PP = 0.94). Graphistemma, Holostemma, Raphistemma, and Seshagiria all belong to the Asclepiadeae-Cynanchinae (BSMP = 97, BSML = 100, PP = 1.0). The study confirms the generally accepted tribal and subtribal structure of the subfamily. One exception is Eustegia minuta, which is here placed as sister to all Asclepiadeae (BSMP = 58, BSML = 76, PP = 0.99) and not as sister to (Marsdenieae+Ceropegieae). The low support and conflicting position indicate the need for a placement of the genus as an independent tribe. In Asclepiadeae, a sister group position of Cynanchinae to (Asclepiadinae+Tylophorinae) is favored (BSMP = 57, BSML = 74, PP = 0.99), while Schizostephanus is retrieved as unresolved. Oxystelma takes a position at the base of Asclepiadinae (BSMP = 52, BSML = 74, PP = 0.69). Calciphila and Solenostemma are associated with Asclepiadinae with low support (BSMP = 37, BSML = 45, PP = 0.79), but all alternative positions are essentially without support. The position of Indian Asclepiadoideae in the family phylogeny is discussed.
  L3  - 
  JF  - Botanical Journal of the Linnean Society
  VL  - 174
  IS  - 
  ER  -