Gene genealogies reveal global phylogeographic structure and reproductive isolation among lineages of Fusarium graminearum, the fungus causing wheat scab
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TLDR
To test whether the primary etiological agent of scab, the fungus Fusarium graminearum, is panmictic throughout its range, allelic genealogies were constructed from six single-copy nuclear genes from strains selected to represent the global genetic diversity of this pathogen.Abstract:
During the past decade, the plant disease called scab or Fusarium head blight of wheat and barley has reached epidemic proportions in North America and elsewhere in the world. Scab is an economically devastating plant disease, not only because it causes significant reduction in seed yields and quality, but also because infested seeds are often contaminated with trichothecene and estrogenic mycotoxins that pose a serious threat to animal health and food safety. To test whether the primary etiological agent of scab, the fungus Fusarium graminearum, is panmictic throughout its range, allelic genealogies were constructed from six single-copy nuclear genes from strains selected to represent the global genetic diversity of this pathogen. Excluding one hybrid strain, all six genealogies recovered the same seven biogeographically structured lineages, suggesting that they represent phylogenetically distinct species among which gene flow has been very limited during their evolutionary history. Parsimony analysis of the combined data set comprising 7,120 aligned nucleotide characters resolved most relationships among the seven lineages of the F. graminearum clade and related fusaria included in the study. Phylogenetic evidence is also presented for introgressive hybridization and intragenic recombination among lineages of the F. graminearum clade in nature.read more
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Phylogenetic Species Recognition and Species Concepts in Fungi
John W. Taylor,David J. Jacobson,Scott Kroken,Takao Kasuga,David M. Geiser,David S. Hibbett,Matthew C. Fisher +6 more
TL;DR: A phylogenetic approach to recognize fungal species based on concordance of multiple gene genealogies is compared to those based on morphology and reproductive behavior.
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The magnitude of fungal diversity: the 1.5 million species estimate revisited
TL;DR: The number of known species of fungi is estimated as at least 74 K, but could be as much as 120 K with allowances for ‘orphaned’ species as discussed by the authors, which is the current working hypothesis for the number of fungi on Earth.
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Heading for disaster: Fusarium graminearum on cereal crops.
TL;DR: Current knowledge on the pathogenicity, population genetics, evolution and genomics of Fusarium graminearum is summarized.
Journal ArticleDOI
FUSARIUM-ID v. 1.0: A DNA sequence database for identifying Fusarium
David M. Geiser,María del Mar Jiménez-Gasco,Seogchan Kang,Izabela Makalowska,Narayanan Veeraraghavan,Todd J. Ward,Ning Zhang,Gretchen A. Kuldau,Kerry O'Donnell +8 more
TL;DR: FUSARIUM-ID v. 1.0, a publicly available database of partial translation elongation factor 1-alpha (TEF) DNA sequences, presently representing a selected sample of the diversity of the genus diversity, with excellent representation of Type-B trichothecene toxin producers, and the Gibberella fujikuroi, Fusarium oxysporum and F. solani species complexes.
Journal ArticleDOI
A European Database of Fusarium graminearum and F. culmorum Trichothecene Genotypes
Matias Pasquali,Marco Beyer,Antonio Logrieco,Kris Audenaert,Virgilio Balmas,Ryan Basler,Anne Laure Boutigny,Jana Chrpová,Elżbieta Czembor,Tatiana Gagkaeva,María Teresa González-Jaén,Ingerd Skow Hofgaard,Nagehan D. Köycü,Lucien Hoffmann,Jelena Levic,Patricia Marín,Thomas Miedaner,Quirico Migheli,Antonio Moretti,Marina E.H. Müller,Françoise Munaut,Päivi Parikka,Marine Pallez-Barthel,Jonathan Piec,Jonathan Scauflaire,Barbara Scherm,Slavica Stanković,Ulf Thrane,Silvio Uhlig,Adriaan Vanheule,Tapani Yli-Mattila,Susanne Vogelgsang +31 more
TL;DR: The results of a collaborative integrated work which aims to characterize the trichothecene genotypes of strains from three Fusarium species, collected over the period 2000–2013 and to enhance the standardization of epidemiological data collection were described.
References
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