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Investigating species boundaries in Colletotrichum

Fungal Diversity 2021年第2期107卷 107-127页

作者： Chitrabhanu S.Bhunjun Chayanard Phukhamsakda Ruvishika S.Jayawardena Rajesh Jeewon Itthayakorn Promputtha Kevin D.Hyde Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Institute of Plant Protection College of AgricultureJilin Agricultural UniversityChangchun 130118JilinPeople’s Republic of China Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi Jilin Agricultural UniversityChangchun 130118JilinPeople’s Republic of China Department of Health Sciences Faculty of Medicine and Health SciencesUniversity of MauritiusReduitMauritius Department of Biology Faculty of ScienceChiang Mai UniversityChiang Mai 50200Thailand

Colletotrichum is one of the most important plant pathogenic genera that is responsible for numerous diseases which can have a profound impact on the agricultural *** delineation is difficult due to a lack of distinctive phenotypic ***,in this study three different genomic approaches based on phylogenetic,evolutionary and coalescent-based methods are applied to establish robust species *** reliability of five different DNA barcodes was also assessed to provide further insights into species *** ITS region can resolve the placement of taxa up to the species complex *** GAPDH and TUB2 markers are determined to be the most informative for most ***,no single marker could discriminate between species in all complexes,therefore different molecular approaches based on multi-locus datasets are *** is the first study to provide an estimated divergence time for all species complexes in *** estimated divergence time for species complexes ranged between 4.8 to 32.2 *** on the high level of congruent results obtained from the different molecular approaches,a new species complex,the Colletotrichum agaves complex is *** complex consists of five taxa which are characterised by the presence of straight or slightly curved conidia with obtuse *** study shows that coalescent approaches and multi-locus phylogeny are crucial to establish species boundaries in *** taxonomic placement of three singleton taxa Colletotrichum axonopodi,*** and *** is *** accept 248 species and provide recommendations regarding species boundaries in the graminicola-caudatum complex.

关键词： BEAST general mixed yule coalescent method Glomerellaceae Multi-rate poisson tree process Sordariomycetes Taxonomy

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