Multi-locus phylogeny and taxonomy of an unresolved, heterogeneous species complex within the genus Golovinomyces (Ascomycota, Erysiphales), including G. ambrosiae, G. circumfusus and G. spadiceus.

BMC Microbiology
Peng-Lei QiuU Braun

Abstract

Previous phylogenetic analyses of species within the genus Golovinomyces (Ascomycota, Erysiphales), based on ITS and 28S rDNA sequence data, revealed a co-evolutionary relationship between powdery mildew species and hosts of certain tribes of the plant family Asteraceae. Golovinomyces growing on host plants belonging to the Heliantheae formed a single lineage, comprised of a morphologically differentiated complex of species, which included G. ambrosiae, G. circumfusus, and G. spadiceus. However, the lineage also encompassed sequences retrieved from Golovinomyces specimens on other Asteraceae tribes as well as other plant families, suggesting the involvement of a plurivorous species. A multilocus phylogenetic examination of this complex, using ITS, 28S, IGS (intergenic spacer), TUB2 (beta-tubulin), and CHS1 (chitin synthase I) sequence data was carried out to clarify the discrepancies between ITS and 28S rDNA sequence data and morphological differences. Furthermore, the circumscription of species and their host ranges were emended. The phylogenetic and morphological analyses conducted in this study revealed three distinct species named, viz., (1) G. ambrosiae emend. (including G. spadiceus), a plurivorous species that occurs on ...Continue Reading

References

Mar 10, 2007·Molecular Phylogenetics and Evolution·Takashi InumaSusumu Takamatsu
Jul 31, 2009·Mycological Research·R T A Cook, U Braun
Mar 1, 2000·Molecular Plant Pathology·Z ZhangS J Gurr
Mar 24, 2016·Molecular Biology and Evolution·Sudhir KumarKoichiro Tamura

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Datasets Mentioned

BETA
CACM00000000
AF188934
MBT385758
MBT385760
MBT385594

Methods Mentioned

BETA
light microscopy
PCR
electrophoresis

Software Mentioned

DNAMAN
ClastalW
Geneious
PAUP
BioEdit Sequence Alignment Editor
MEGA

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