CiteULike

Delicious

Connotea

Citation for Study 756

Citation title: "The phylogeny of Gentianella (Gentianaceae) and its colonization of the southern hemisphere as revealed by nuclear and chloroplast DNA sequence variation.".

This study was previously identified under the legacy study ID S608 (Status: Published).

Citation

Von hagen K., & Kadereit J. 2001. The phylogeny of Gentianella (Gentianaceae) and its colonization of the southern hemisphere as revealed by nuclear and chloroplast DNA sequence variation. Organisms Diversity & Evolution, 1: 61-79.

Authors

• Von hagen K.
• Kadereit J.

Abstract

The generic circumscription and infrageneric phylogeny of Gentianella was analysed based on matK and ITS sequence variation. Our results suggested that Gentianella is polyphyletic and should be limited to species with only one nectary per petal lobe. Gentianella in such a circumscription is most closely related to one part of a highly polyphyletic Swertia. Within uninectariate Gentianella two major groups could be recognized: 1) northern hemispheric species with vascularized fimbriae at the base of the corolla lobes, and 2) northern hemispheric, South American, and Australia/New Zealand species without vascularized fimbriae. When fimbriae are present in this latter group, they are non-vascularized. Whereas ITS data suggested a sister group relationship between the fimbriate and efimbriate group, the matK data suggested paraphyly of the efimbriate group with Eurasian efimbriate species as sister to the remainder of the clade. Based on the phylogeny and using geological and fossil evidence and a molecular clock approach, it is postulated that the efimbriate lineage originated in East Asia near the end of the Tertiary. From East Asia it spread via North America to South America, and from there it reached Australia/New Zealand only once by a single long-distance dispersal event. The place of origin of the fimbriate lineage remained doubtful. The high specific diversity of Gentianella in South America probably resulted mainly from the availability of a very large alpine area open to colonization rather than from particularly high speciation rates in comparison to other taxa.

Keywords

Gentianella; flower morphology; biogeography; long-distance dispersal; molecular clock; speciation rate

External links

• DOI: 10.1078/1439-6092-00005

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S756
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref18000,
  	 author = {K. B.  von Hagen and Joachim W.  Kadereit},
  	 title = {The phylogeny of Gentianella (Gentianaceae) and its colonization of the southern hemisphere as revealed by nuclear and chloroplast DNA sequence variation.},
  	 year = {2001},
  	 keywords = {Gentianella; flower morphology; biogeography; long-distance dispersal; molecular clock; speciation rate},
  	 doi = {10.1078/1439-6092-00005},
  	 url = {},
  	 pmid = {},
  	 journal = {Organisms Diversity & Evolution},
  	 volume = {1},
  	 number = {},
  	 pages = {61--79},
  	 abstract = {The generic circumscription and infrageneric phylogeny of Gentianella was analysed based on matK and ITS sequence variation. Our results suggested that Gentianella is polyphyletic and should be limited to species with only one nectary per petal lobe. Gentianella in such a circumscription is most closely related to one part of a highly polyphyletic Swertia. Within uninectariate Gentianella two major groups could be recognized: 1) northern hemispheric species with vascularized fimbriae at the base of the corolla lobes, and 2) northern hemispheric, South American, and Australia/New Zealand species without vascularized fimbriae. When fimbriae are present in this latter group, they are non-vascularized. Whereas ITS data suggested a sister group relationship between the fimbriate and efimbriate group, the matK data suggested paraphyly of the efimbriate group with Eurasian efimbriate species as sister to the remainder of the clade. Based on the phylogeny and using geological and fossil evidence and a molecular clock approach, it is postulated that the efimbriate lineage originated in East Asia near the end of the Tertiary. From East Asia it spread via North America to South America, and from there it reached Australia/New Zealand only once by a single long-distance dispersal event. The place of origin of the fimbriate lineage remained doubtful. The high specific diversity of Gentianella in South America probably resulted mainly from the availability of a very large alpine area open to colonization rather than from particularly high speciation rates in comparison to other taxa.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 18000
  AU  - von Hagen,K. B. 
  AU  - Kadereit,Joachim W. 
  T1  - The phylogeny of Gentianella (Gentianaceae) and its colonization of the southern hemisphere as revealed by nuclear and chloroplast DNA sequence variation.
  PY  - 2001
  KW  - Gentianella; flower morphology; biogeography; long-distance dispersal; molecular clock; speciation rate
  UR  - http://dx.doi.org/10.1078/1439-6092-00005
  N2  - The generic circumscription and infrageneric phylogeny of Gentianella was analysed based on matK and ITS sequence variation. Our results suggested that Gentianella is polyphyletic and should be limited to species with only one nectary per petal lobe. Gentianella in such a circumscription is most closely related to one part of a highly polyphyletic Swertia. Within uninectariate Gentianella two major groups could be recognized: 1) northern hemispheric species with vascularized fimbriae at the base of the corolla lobes, and 2) northern hemispheric, South American, and Australia/New Zealand species without vascularized fimbriae. When fimbriae are present in this latter group, they are non-vascularized. Whereas ITS data suggested a sister group relationship between the fimbriate and efimbriate group, the matK data suggested paraphyly of the efimbriate group with Eurasian efimbriate species as sister to the remainder of the clade. Based on the phylogeny and using geological and fossil evidence and a molecular clock approach, it is postulated that the efimbriate lineage originated in East Asia near the end of the Tertiary. From East Asia it spread via North America to South America, and from there it reached Australia/New Zealand only once by a single long-distance dispersal event. The place of origin of the fimbriate lineage remained doubtful. The high specific diversity of Gentianella in South America probably resulted mainly from the availability of a very large alpine area open to colonization rather than from particularly high speciation rates in comparison to other taxa.
  L3  - 10.1078/1439-6092-00005
  JF  - Organisms Diversity & Evolution
  VL  - 1
  IS  - 
  SP  - 61
  EP  - 79
  ER  -