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Citation for Study 10162

Citation title: "Evidence for high degrees of specialisation, evolutionary diversity, and morphological distinctiveness in the genus Bremia.".

This study was previously identified under the legacy study ID S2506 (Status: Published).

Citation

Choi Y., Thines M., Runge F., Hong S., Telle S., & Shin H. 2011. Evidence for high degrees of specialisation, evolutionary diversity, and morphological distinctiveness in the genus Bremia. Fungal Biology, 115(2): 102-111.

Authors

• Choi Y.
• Thines M.
• Runge F.
• Hong S.
• Telle S.
• Shin H.

Abstract

Bremia lactucae is one of the economically most important pathogens in lettuce production. Recent molecular studies have shown Bremia lactucae (Peronosporales) to consist of several genetically distinct entities. However, as only few accessions from the same host have been investigated and it is generally believed that it is hardly possible to use morphological characteristics for species delimitation in Bremia, B. lactucae is still regarded as a sole species of Bremia causing downy mildew disease of the family Asteraceae. Therefore, multiple accessions of selected species that had been described decades ago, but have not been widely accepted, were investigated both on the basis of multi-gene molecular phylogenies and morphological characters. All previously described species included, B. microspora, B. ovata, B. saussureae, and B. sonchicola could be confirmed as highly distinct, host specific entities. Also morphological characterisitcs of their conidiophores and conidia allowed delimitation of the five species. Therefore, the wide species concept to merge all Bremia species on the Cichorioideae under B. lactucae is inappropriate. In addition, it could be shown that B. elliptica is phylogenetically distinct from the second species infecting the genus Lactuca, B. lactucae. It is therefore concluded that Bremia lactucae is most likely limited to Lactuca sativa and closely related species, and thus infections of unrelated wild Asteraceae weeds with Bremia are not posing a risk for lettuce production. The finding that Bremia lactucae is highly host specific might stimulate the search for durable resistance genes in genera closely related to the genus Lactuca and in divergent species of the genus itself.

External links

• DOI: 10.1016/j.funbio.2010.10.010

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S10162
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref18653,
  	 author = {Y. J.  Choi and Marco  Thines and Fabian  Runge and S. B.  Hong and Sabine  Telle and H. D.  Shin},
  	 title = {Evidence for high degrees of specialisation, evolutionary diversity, and morphological distinctiveness in the genus Bremia.},
  	 year = {2011},
  	 keywords = {},
  	 doi = {10.1016/j.funbio.2010.10.010},
  	 url = {},
  	 pmid = {},
  	 journal = {Fungal Biology},
  	 volume = {115},
  	 number = {2},
  	 pages = {102--111},
  	 abstract = {Bremia lactucae is one of the economically most important pathogens in lettuce production. Recent molecular studies have shown Bremia lactucae (Peronosporales) to consist of several genetically distinct entities. However, as only few accessions from the same host have been investigated and it is generally believed that it is hardly possible to use morphological characteristics for species delimitation in Bremia, B. lactucae is still regarded as a sole species of Bremia causing downy mildew disease of the family Asteraceae. Therefore, multiple accessions of selected species that had been described decades ago, but have not been widely accepted, were investigated both on the basis of multi-gene molecular phylogenies and morphological characters. All previously described species included, B. microspora, B. ovata, B. saussureae, and B. sonchicola could be confirmed as highly distinct, host specific entities. Also morphological characterisitcs of their conidiophores and conidia allowed delimitation of the five species. Therefore, the wide species concept to merge all Bremia species on the Cichorioideae under B. lactucae is inappropriate. In addition, it could be shown that B. elliptica is phylogenetically distinct from the second species infecting the genus Lactuca, B. lactucae. It is therefore concluded that Bremia lactucae is most likely limited to Lactuca sativa and closely related species, and thus infections of unrelated wild Asteraceae weeds with Bremia are not posing a risk for lettuce production. The finding that Bremia lactucae is highly host specific might stimulate the search for durable resistance genes in genera closely related to the genus Lactuca and in divergent species of the genus itself.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 18653
  AU  - Choi,Y. J. 
  AU  - Thines,Marco 
  AU  - Runge,Fabian 
  AU  - Hong,S. B. 
  AU  - Telle,Sabine 
  AU  - Shin,H. D. 
  T1  - Evidence for high degrees of specialisation, evolutionary diversity, and morphological distinctiveness in the genus Bremia.
  PY  - 2011
  KW  - 
  UR  - http://dx.doi.org/10.1016/j.funbio.2010.10.010
  N2  - Bremia lactucae is one of the economically most important pathogens in lettuce production. Recent molecular studies have shown Bremia lactucae (Peronosporales) to consist of several genetically distinct entities. However, as only few accessions from the same host have been investigated and it is generally believed that it is hardly possible to use morphological characteristics for species delimitation in Bremia, B. lactucae is still regarded as a sole species of Bremia causing downy mildew disease of the family Asteraceae. Therefore, multiple accessions of selected species that had been described decades ago, but have not been widely accepted, were investigated both on the basis of multi-gene molecular phylogenies and morphological characters. All previously described species included, B. microspora, B. ovata, B. saussureae, and B. sonchicola could be confirmed as highly distinct, host specific entities. Also morphological characterisitcs of their conidiophores and conidia allowed delimitation of the five species. Therefore, the wide species concept to merge all Bremia species on the Cichorioideae under B. lactucae is inappropriate. In addition, it could be shown that B. elliptica is phylogenetically distinct from the second species infecting the genus Lactuca, B. lactucae. It is therefore concluded that Bremia lactucae is most likely limited to Lactuca sativa and closely related species, and thus infections of unrelated wild Asteraceae weeds with Bremia are not posing a risk for lettuce production. The finding that Bremia lactucae is highly host specific might stimulate the search for durable resistance genes in genera closely related to the genus Lactuca and in divergent species of the genus itself.
  L3  - 10.1016/j.funbio.2010.10.010
  JF  - Fungal Biology
  VL  - 115
  IS  - 2
  SP  - 102
  EP  - 111
  ER  -