Molecular Data Sets and Broad Taxon Sampling in Detecting Morphological Convergence

  • M. Blackwell
  • J. W. Spatafora
Chapter
Part of the NATO ASI Series book series (NSSA, volume 269)

Summary

Previous hypotheses of relationships between Pyxidiophora and other perithecial ascomycetes with morphological features facilitating arthropod dispersal were examined. Partial sequences of the nuclear encoded small subunit rDNA for about fifty taxa provided a database for phylogenetic analysis. The resulting analysis using parsimony criteria failed to support previous hypotheses of relationships involving taxa with arthropod associations. The following hypotheses are supported: (1) taxa with evansecent asci are in six independent lineages; (2) Pyxidiophora, Subbaromyces, and Kathistes are basal to the larger clade of derived perithecial species; (3) Pyxidiophora does not share a common ancestory with the Hypocreales, Ophiostoma, or Ceratocystis; and (4) Pyxidiophora is not allied with any of the yeasts, including Cephaloascus and Ambrosiozyma. More taxa remain to be sampled since Pyxidiophora is in a region of the tree that is still somewhat unstable.

Keywords

American Phytopathological Society Ophiostomatoid Fungus Illinois Natural History Survey High Level Taxon Small Subunit rDNA 
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

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • M. Blackwell
    • 1
  • J. W. Spatafora
    • 2
  1. 1.Department of BotanyLouisiana State UniversityBaton RougeUSA
  2. 2.Department of BotanyDuke UniversityDurhamUSA

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