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Citation for Study 16896

Citation title: "Multi-locus tree and species tree approaches towards resolving a complex clade of downy mildews (Straminipila, Oomycota), including pathogens of beet and spinach ".

Study name: "Multi-locus tree and species tree approaches towards resolving a complex clade of downy mildews (Straminipila, Oomycota), including pathogens of beet and spinach ".

This study is part of submission 16896 (Status: Published).

Citation

Choi Y., Klosterman S.J., Kummer V., Voglmayr H., Shin H., & Thines M. 2015. Multi-locus tree and species tree approaches towards resolving a complex clade of downy mildews (Straminipila, Oomycota), including pathogens of beet and spinach. Molecular Phylogentics and Evolution, .

Authors

• Choi Y.
• Klosterman S.J.
• Kummer V.
• Voglmayr H.
• Shin H.
• Thines M. +496975421833

Abstract

Accurate species determination of plant pathogens is a prerequisite for their control and quarantine, and further for assessing their potential threat to crops. The family Peronosporaceae (Straminipila; Oomycota) consists of obligate biotrophic pathogens that cause downy mildew disease on angiosperms, including a large number of cultivated plants. In the largest downy mildew genus Peronospora, a phylogenetically complex clade includes the economically important downy mildew pathogens of spinach and beet, as well as the type species of the genus Peronospora. To resolve this complex clade at the species level and to infer evolutionary relationships among them, we used multi-locus phylogenetic analysis and species tree estimation. Both approaches discriminated all nine currently accepted species and revealed four previously unrecognized lineages, which are specific to a host genus or species. This is in line with a narrow species concept, i.e. that a downy mildew species is associated with only a particular host plant genus or species. Instead of applying the dubious name Peronospora farinosa, which has been proposed for formal rejection, our results provide strong evidence that Peronospora schachtii is an independent species from lineages on Atriplex and apparently occurs exclusively on Beta vulgaris. The members of the clade investigated, the Peronospora rumicis clade, associate with three different host plant families, Amaranthaceae, Caryophyllaceae, and Polygonaceae, suggesting that they may have speciated following at least two recent inter-family host shifts, rather than contemporary cospeciation with the host plants.

Keywords

cospeciation; host shift; multi-locus phylogeny; Oomycetes; Peronospora farinosa; species tree

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S16896
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref24050,
  	 author = {Young-Joon  Choi and Steven J Klosterman and Volker  Kummer and Hermann  Voglmayr and Hyeon-Dong   Shin and Marco  Thines},
  	 title = {Multi-locus tree and species tree approaches towards resolving a complex clade of downy mildews (Straminipila, Oomycota), including pathogens of beet and spinach },
  	 year = {2015},
  	 keywords = {cospeciation; host shift; multi-locus phylogeny; Oomycetes; Peronospora farinosa; species tree},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Molecular Phylogentics and Evolution},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Accurate species determination of plant pathogens is a prerequisite for their control and quarantine, and further for assessing their potential threat to crops. The family Peronosporaceae (Straminipila; Oomycota) consists of obligate biotrophic pathogens that cause downy mildew disease on angiosperms, including a large number of cultivated plants. In the largest downy mildew genus Peronospora, a phylogenetically complex clade includes the economically important downy mildew pathogens of spinach and beet, as well as the type species of the genus Peronospora. To resolve this complex clade at the species level and to infer evolutionary relationships among them, we used multi-locus phylogenetic analysis and species tree estimation. Both approaches discriminated all nine currently accepted species and revealed four previously unrecognized lineages, which are specific to a host genus or species. This is in line with a narrow species concept, i.e. that a downy mildew species is associated with only a particular host plant genus or species. Instead of applying the dubious name Peronospora farinosa, which has been proposed for formal rejection, our results provide strong evidence that Peronospora schachtii is an independent species from lineages on Atriplex and apparently occurs exclusively on Beta vulgaris. The members of the clade investigated, the Peronospora rumicis clade, associate with three different host plant families, Amaranthaceae, Caryophyllaceae, and Polygonaceae, suggesting that they may have speciated following at least two recent inter-family host shifts, rather than contemporary cospeciation with the host plants. }
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 24050
  AU  - Choi,Young-Joon 
  AU  - Klosterman,Steven J
  AU  - Kummer,Volker 
  AU  - Voglmayr,Hermann 
  AU  - Shin,Hyeon-Dong  
  AU  - Thines,Marco 
  T1  - Multi-locus tree and species tree approaches towards resolving a complex clade of downy mildews (Straminipila, Oomycota), including pathogens of beet and spinach 
  PY  - 2015
  KW  - cospeciation; host shift; multi-locus phylogeny; Oomycetes; Peronospora farinosa; species tree
  UR  - http://dx.doi.org/
  N2  - Accurate species determination of plant pathogens is a prerequisite for their control and quarantine, and further for assessing their potential threat to crops. The family Peronosporaceae (Straminipila; Oomycota) consists of obligate biotrophic pathogens that cause downy mildew disease on angiosperms, including a large number of cultivated plants. In the largest downy mildew genus Peronospora, a phylogenetically complex clade includes the economically important downy mildew pathogens of spinach and beet, as well as the type species of the genus Peronospora. To resolve this complex clade at the species level and to infer evolutionary relationships among them, we used multi-locus phylogenetic analysis and species tree estimation. Both approaches discriminated all nine currently accepted species and revealed four previously unrecognized lineages, which are specific to a host genus or species. This is in line with a narrow species concept, i.e. that a downy mildew species is associated with only a particular host plant genus or species. Instead of applying the dubious name Peronospora farinosa, which has been proposed for formal rejection, our results provide strong evidence that Peronospora schachtii is an independent species from lineages on Atriplex and apparently occurs exclusively on Beta vulgaris. The members of the clade investigated, the Peronospora rumicis clade, associate with three different host plant families, Amaranthaceae, Caryophyllaceae, and Polygonaceae, suggesting that they may have speciated following at least two recent inter-family host shifts, rather than contemporary cospeciation with the host plants. 
  L3  - 
  JF  - Molecular Phylogentics and Evolution
  VL  - 
  IS  - 
  ER  -