Phylogenetic relationships of graminicolous downy mildews based on cox2 sequence data

Article


Thines, Marco, Goker, Markus, Telle, Sabine, Ryley, Malcolm, Mathur, Kusum, Narayana, Yaladabagi D., Spring, Otmar and Thakur, Ram P.. 2008. "Phylogenetic relationships of graminicolous downy mildews based on cox2 sequence data." Mycological Research. 112 (3), pp. 345-351. https://doi.org/10.1016/j.mycres.2007.10.010
Article Title

Phylogenetic relationships of graminicolous downy mildews based on cox2 sequence data

ERA Journal ID2504
Article CategoryArticle
AuthorsThines, Marco (Author), Goker, Markus (Author), Telle, Sabine (Author), Ryley, Malcolm (Author), Mathur, Kusum (Author), Narayana, Yaladabagi D. (Author), Spring, Otmar (Author) and Thakur, Ram P. (Author)
Journal TitleMycological Research
Fungal Biology
Journal Citation112 (3), pp. 345-351
Number of Pages7
Year2008
Place of PublicationLondon, United Kingdom
ISSN0953-7562
1469-8102
1878-6146
Digital Object Identifier (DOI)https://doi.org/10.1016/j.mycres.2007.10.010
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S0953756207002432
Abstract

Graminicolous downy mildews (GDM) are an understudied, yet economically important, group of plant pathogens, which are one of the major constraints to poaceous crops in the tropics and subtropics. Here we present a first molecular phylogeny based on cox2 sequences comprising all genera of the GDM currently accepted, with both lasting (Graminivora, Poakatesthia, and Viennotia) and evanescent (Peronosclerospora, Sclerophthora, and Sclerospora) sporangiophores. In addition, all other downy mildew genera currently accepted, as well as a representative sample of other oomycete taxa, have been included. It was shown that all genera of the GDM have had a long, independent evolutionary history, and that the delineation between Peronosclerospora and Sclerospora is correct. Sclerophthora was found to be a particularly divergent taxon nested within a paraphyletic Phytophthora, but without support. The results confirm that the placement of Peronosclerospora and Sclerospora in the Saprolegniomycetidae is incorrect. Sclerophthora is not closely related to Pachymetra of the family Verrucalvaceae, and also does not belong to the Saprolegniomycetidae, but shows close affinities to the Peronosporaceae. In addition, all GDM are interspersed throughout the Peronosporaceae s lat., suggesting that a separate family for the Sclerosporaceae might not be justified.

KeywordsPennisetum glaucum; Peronosporaceae phylogeny; Sarga; Sorghum bicolour; Zea mays
ANZSRC Field of Research 2020310705. Mycology
300409. Crop and pasture protection (incl. pests, diseases and weeds)
310410. Phylogeny and comparative analysis
Public Notes

© 2007 The British Mycological Society. Published version deposited in accordance with the copyright policy of the publisher.

Byline AffiliationsSenckenberg Biodiversity and Climate Research Centre, Germany
Eberhard Karl University of Tübingen, Germany
Department of Primary Industries and Fisheries, Queensland
Maharana Pratap University of Agriculture and Technology, India
University of Agricultural Sciences Dharwad, India
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), India
Institution of OriginUniversity of Southern Queensland
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