Poster (Scientific congresses and symposiums)
Multilocus-based phylogeny and species recognition within the cosmopolitan Peltigera neopolydactyla-dolichorhiza complex
Magain, Nicolas; Miadlikowska, Jolanta; Lutzoni, François et al.
2012The 7th IAL Symposium - Lichens: frome genome to ecosystems in a changing world
 

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Keywords :
Peltigera; phylogeny; species recognition; RPB1; EFT2.1; beta-tubuline; maximum likelihood; ITS; ascomycota; lichen; Peltigerales; species complex
Abstract :
[en] The Peltigera neopolydactyla/dolichorhiza complex is broadly distributed, growing in boreal and temperate regions from northern Norway to southern Chile, as well as in tropical mountains. Observed morphotype and chemotype variation within this complex suggested the presence of multiple undescribed species. We inferred the phylogeny of Peltigera section Polydactylon with a special focus on the Peltigera neopolydactyla/dolichorhiza complex to determine the full breadth of this species complex, and to assess if taxa from different parts of the worlds but with similar morphological features share a most recent common ancestor. About 525 ITS sequences representing 104 distinct haplotypes were generated for representatives of Peltigera section Polydactylon. We selected a representative of each broadly defined phylotype for which three protein-coding loci: RPB1.1, b-tubulin and EFT2.1 were sequenced. Each of the three protein coding loci provided equivalent or more resolution and support than the ITS locus. The greatest proportion of significantly supported nodes across the tree resulted from β-tubulin alone. Many specimens identified as P. neopolydactyla and P. dolichorhiza are placed outside of this species complex. As currently defined both species represent polyphyletic assemblages of taxa including several potentially undescribed species. Our phylogenies suggest the presence of putatively new species within several complexes across the section.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Magain, Nicolas  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation
Miadlikowska, Jolanta;  Duke University > Biology
Lutzoni, François;  Duke University > Biology
Goffinet, Bernard;  University of Connecticut - UCONN > Ecology and Evolutionary Biology
Sérusiaux, Emmanuël ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation
Language :
English
Title :
Multilocus-based phylogeny and species recognition within the cosmopolitan Peltigera neopolydactyla-dolichorhiza complex
Publication date :
January 2012
Event name :
The 7th IAL Symposium - Lichens: frome genome to ecosystems in a changing world
Event organizer :
IAL- International Association for Lichenology
Event place :
Bangkok, Thailand
Event date :
du 9 au 13 janvier 2012
Audience :
International
Name of the research project :
REVSYS: Phylogenetic revision of the lichen-genus Peltigera (Ascomycota): Disentangling cryptic speciation, phenotypic plasticity, and hybridization.
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
NSF - National Science Foundation [US-VA]
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since 13 August 2012

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