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Thelonectria is a recently established genus of common and ubiquitous fungi on woody hosts, previously placed in the genus Neonectria. Thelonectria coronata and T. veuillotiana occur sympatrically in tropical, subtropical and temperate regions. Previous taxonomic studies including T. coronata and T. veuillotiana suggested these fungi could represent species complexes; however, the morphological features used to define species exhibited few differences useful for testing this hypothesis. To assess the status of T. coronata and T. veuillotiana, phylogenetic analyses of six genomic regions were combined with a morphological examination of specimens. A multigene phylogeny reconstructed with maximum parsimony, maximum likelihood and Bayesian approaches identified five phylogenetic groups in T. coronata and six in T. veuillotiana. As is common for cryptic species, unequivocal diagnostic morphological characters could not be identified; however, average values of morphological traits correspond to the phylogenetic groups. An increased number of nonsynonymous/ synonymous substitutions in the b-tubulin gene and a decreased or absent production of conidia were detected within the T. coronata complex, possibly indicating the homothallic nature of these isolates. T. coronata and T. veuillotiana and related species are described and illustrated here; a dichotomous key to all species is provided. © 2012 by The Mycological Society of America.


Documento: Artículo
Título:Multigene phylogenetic analyses of the Thelonectria coronata and T. veuillotiana species complexes
Autor:Salgado-Salazar, C.; Rossman, A.; Samuels, G.J.; Capdet, M.; Chaverri, P.
Filiación:University of Maryland, Department of Plant Science and Landscape Architecture, 2112 Plant Sciences Building, College Park, MD 20742, United States
USDA-ARS, Systematic Mycology and Microbiology Laboratory, Beltsville, MD 20705, United States
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, Buenos Aires, Argentina
Palabras clave:Ascomycota; Fungi; Homothallic; Hypocreales; Neonectria; Phylogenetic analyses; Species concept; Taxonomy; actin; fungal DNA; fungal protein; ribosomal spacer DNA; ribosome DNA; RNA polymerase II; tubulin; Bayesian analysis; fungus; genomics; hypothesis testing; identification key; maximum likelihood analysis; morphology; parsimony analysis; phylogenetics; species complex; species concept; sympatry; taxonomy; woody plant; article; Ascomycetes; chemistry; classification; cytology; DNA sequence; fungus spore; genetics; isolation and purification; microbiological examination; molecular genetics; multilocus sequence typing; nucleotide sequence; phylogeny; RNA translation; Actins; Ascomycota; Base Sequence; DNA, Fungal; DNA, Ribosomal; DNA, Ribosomal Spacer; Fungal Proteins; Molecular Sequence Data; Multilocus Sequence Typing; Mycological Typing Techniques; Peptide Chain Elongation, Translational; Phylogeny; RNA Polymerase II; Sequence Analysis, DNA; Spores, Fungal; Tubulin; Ascomycota; Fungi; Hypocreales; Neonectria
Página de inicio:1325
Página de fin:1350
Título revista:Mycologia
Título revista abreviado:Mycologia
CAS:Actins; DNA, Fungal; DNA, Ribosomal; DNA, Ribosomal Spacer; Fungal Proteins; RNA Polymerase II, 2.7.7.-; Tubulin


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---------- APA ----------
Salgado-Salazar, C., Rossman, A., Samuels, G.J., Capdet, M. & Chaverri, P. (2012) . Multigene phylogenetic analyses of the Thelonectria coronata and T. veuillotiana species complexes. Mycologia, 104(6), 1325-1350.
---------- CHICAGO ----------
Salgado-Salazar, C., Rossman, A., Samuels, G.J., Capdet, M., Chaverri, P. "Multigene phylogenetic analyses of the Thelonectria coronata and T. veuillotiana species complexes" . Mycologia 104, no. 6 (2012) : 1325-1350.
---------- MLA ----------
Salgado-Salazar, C., Rossman, A., Samuels, G.J., Capdet, M., Chaverri, P. "Multigene phylogenetic analyses of the Thelonectria coronata and T. veuillotiana species complexes" . Mycologia, vol. 104, no. 6, 2012, pp. 1325-1350.
---------- VANCOUVER ----------
Salgado-Salazar, C., Rossman, A., Samuels, G.J., Capdet, M., Chaverri, P. Multigene phylogenetic analyses of the Thelonectria coronata and T. veuillotiana species complexes. Mycologia. 2012;104(6):1325-1350.