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Bayesian analyses of five gene regions reveal a new phylogenetic species of Macrophomina associated with charcoal rot on oilseed crops in Brazil. Repositório Alice
Macrophomina is a genus belonging to Botryosphaeriaceae that comprises well-known necrotrophic pathogens related to hundreds of plant hosts around the world. Historically, M. phaseolina is the causal agent of charcoal rot in several crops, mainly in tropical and subtropical areas around the world. However, after a recent genetic diversity study using morphological and molecular approaches, which resulted in the epitypification of M. phaseolina, and the description of a new Macrophomina species associated with charcoal rot disease, the hypothesis that other cryptic species could be present under the name M. phaseolina was raised. Previous studies in Brazil revealed a high genetic diversity and different levels of aggressiveness of M. phaseolina isolates...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cryptic species; Soil-borne fungi; Botryosphaeriales; Phylogeny; Plant pathology.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118666
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Confronting the constraints of morphological taxonomy in the Botryosphaeriales Naturalis
Slippers, B.; Roux, J.; Wingfield, M.J.; Walt, F.J.J. van der; Jami, F.; Mehl, J.W.M.; Marais, G.J..
Identification of fungi and the International Code of Nomenclature underpinning this process, rests strongly on the characterisation of morphological structures. Yet, the value of these characters to define species in many groups has become questionable or even superfluous. This has emerged as DNA-based techniques have increasingly revealed cryptic species and species complexes. This problem is vividly illustrated in the present study where 105 isolates of the Botryosphaeriales were recovered from both healthy and diseased woody tissues of native Acacia spp. in Namibia and South Africa. Thirteen phylogenetically distinct groups were identified based on Internal Transcribed Spacer (ITS) rDNA PCR-RFLP and translation elongation factor 1-α (TEF1-α) sequence...
Tipo: Article / Letter to the editor Palavras-chave: Botryosphaeriales; Morphotaxa; Phylogeny; Taxonomy; Tree health.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/532438
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Phylogeny and taxonomic revision of the Planistromellaceae including its coelomycetous anamorphs: contributions towards a monograph of the genus Kellermania Naturalis
Minnis, A.M.; Kennedy, A.H.; Grenier, D.B.; Palm, M.E.; Rossman, A.Y..
The core species of the family Planistromellaceae are included in the teleomorphic genera Planistroma and Planistromella and the connected anamorphic, coelomycetous genera Alpakesa, Kellermania, and Piptarthron. These genera have been defined primarily on the basis of ascospore septation or number of conidial appendages. Due to a lack of DNA sequence data, phylogenetic placement of these genera within the Dothideomycetes, evaluation of monophyly, and questions about generic boundaries could not be adequately addressed in the past. Isolates of nearly all of the known species in these genera were studied genetically and morphologically. DNA sequence data were generated for the nSSU, ITS, nLSU, and RPB1 markers and analysed phylogenetically. These results...
Tipo: Article / Letter to the editor Palavras-chave: Agavaceae; Ascomycota; Asparagaceae; Botryosphaeriaceae; Botryosphaeriales; Coelomycetes; Dothideomycetes; Molecular phylogeny; Planistromellaceae; Septoplaca; Taxonomy.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/532255
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