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01 - A high resolution phylogeny from the genome data of Teratosphaeria leaf and stem pathogens

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Presented at

XXV IUFRO WORLD CONGRESS

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Abstract

Teratosphaeria (Dothideomycetes: Capnodiales) is a genus of fungi primarily associated with the leaves of Eucalyptus hosts. Whereas the majority of species appear not to be important, some Teratosphaeria species have emerged as aggressive pathogens causing substantial economic losses in areas where Eucalyptus spp. are grown as exotics in plantations. Two of these are unusual in being stem canker pathogens rather than infecting leaves and shoots. The taxonomic relationships for this diverse group are generally poorly resolved, especially at the deeper branches of phylogenetic trees. The aim of this study was to construct a robust phylogenomic tree to resolve the relationships among Teratosphaeria species for which whole genome sequences are available. We incorporated seven Teratosphaeria species into the phylogenomic tree, using a total of 11 genomes that have been sequenced by our research group. Single-copy, orthologous core genes, shared by all isolates, were identified using the Ascomycota dataset in BUSCO (Benchmarking Universal Single-Copy Orthologs). More than 1000 orthologous genes were used to construct a Maximum Likelihood phylogeny with RaXML. The resultant phylogenomic tree provided strong support for internal branches that were poorly supported in single-gene trees.

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© Copyright 2020 Morressier GmbH.
All rights reserved.