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Group I intron versus ITS sequences in phylogeny of cetrarioid lichens.

  • Arne Thell
Publishing year: 1999
Language: English
Pages: 441-449
Publication/Series: Lichenologist
Volume: 31
Issue: 5
Document type: Journal article
Publisher: Cambridge University Press

Abstract english

Phylogenetic trees based on group I intron sequences and on internal transcribed spacer (ITS) sequences of mycobiont ribosomal genes were calculated and compared. Eight cetrarioid and four non-cetrarioid species of the Parmeliaceae were compared. The phylogeny based on group I intron sequences is partly congruent with the ITS sequence phylogeny. Group I intron sequences are presumably less informative for infragenic studies. The introns have a length of 214–233 nucleotides, and differ at up to 33% of the bases between species. All introns analysed are located between the positions 1516 and 1517 of the fungal 18S ribosomal RNA gene. Cetrarioid lichens form a non-homogeneous group within the Parmeliaceae according to both group I intron and ITS sequences.


  • Botany


  • ISSN: 0024-2829
Arne Thell
E-mail: arne [dot] thell [at] biol [dot] lu [dot] se

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CV (pdf; 64 kB)

Parmeliaceae - Nordic Lichen Flora

Betonica officinalis
Betonica officinalis

Parmelia ernstiae
Parmelia ernstiae