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Mycological Progress

, Volume 3, Issue 4, pp 315–323 | Cite as

A phylogenetic study of some Septoria species pathogenic to Asteraceae based on ITS ribosomal DNA sequences

  • Gerard J. M. VerkleyEmail author
  • Mieke Starink-Willemse
Article

Abstract

The phylogenetic relationships of the following 14 Septoria species pathogenic to Asteraceae were inferred from sequence analyses of the 5.8 S gene of nuclear rDNA and flanking internal transcribed spacers: Septoria atropurpurea, S. astericola, S. calendulae, S. erigerontis, S. gerberae, S. helianthi, S. helianthicola, S. lactucae, S. leucanthemi, S. obesa, S. schnabliana, S. senecionis, S. socia, and S. taraxaci. Fifteen additional Septoria species originating from other host families, eight of which have a known Mycosphaerella teleomorph, were included in the alignment. Also included were selected strains of Cercospora, Pseudocercospora (including Paracercospora), Ramularia, and several other anamorph genera linked to Mycosphaerella available from previous studies.

The analyses indicate that the Septoria species from Asteraceae are all closely related, and share an evolutionary history within the Mycosphaerellaceae, grouping amongst miscellaneous Mycosphaerella species, Cercospora and Pseudocercospora spp. Septoria socia is relatively distant from the other Septoria on Asteraceae, and the data suggest that it is more closely related to the maple pathogen S. aceris (tel. M. latebrosa) and poplar pathogen S. populicola (tel. M. populicola). Differences in the ITS sequences indicate that S. socia and S. leucanthemi, which have very similar phenotypes and have been considered to be conspecific in the past, are specifically distinct.

Keywords

Sequence Analysis Evolutionary History Phylogenetic Relationship Poplar Phylogenetic Study 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© DGfM 2004

Authors and Affiliations

  • Gerard J. M. Verkley
    • 1
    Email author
  • Mieke Starink-Willemse
    • 1
  1. 1.Centraalbureau voor SchimmelculturesFungal Biodiversity CentreUtrechtThe Netherlands

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