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Insights into the genus Diaporthe:phylogenetic species delimitation in the *** species complex

Fungal Diversity 2014年第4期67卷 203-229页

作者： Dhanushka Udayanga Lisa A.Castlebury Amy Y.Rossman Ekachai Chukeatirote Kevin D.Hyde Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China worldagroforestry centre East and Central AsiaKunming 650201China Institute of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Systematic Mycology and Microbiology Laboratory United States Department of Agriculture-Agricultural Research ServiceBeltsvilleMD 20705USA

The genus Diaporthe comprises pathogenic,endophytic and saprobic species with both temperate and tropical *** diversification,phenotypic plasticity and extensive host associations have long complicated accurate identifications of species in this *** delimitation of the generic type species Diaporthe eres has been uncertain due to the lack of ex-type *** limits of *** and closely related species were evaluated using molecular phylogenetic analysis of eight genes including nuclear ribosomal internal transcribed spacer(ITS),partial sequences of actin(ACT),DNA-lyase(Apn2),translation elongation factor 1-α(EF1-α),beta-tubulin(TUB),calmodulin(CAL),60s ribosomal protein L37(FG1093)and histone-3(HIS).The occurrence of sequence heterogeneity of ITS within *** is observed,which complicates the analysis and may lead to overestimation of the species *** strict criteria of Genealogical Concordance Phylogenetic Species Recognition(GCPSR)were applied to resolve species boundaries based on individual and combined analyses of other seven genes except the *** accept nine distinct phylogenetic species including Diaporthe alleghaniensis,***,***,***,***,***,***,*** and *** are designated for ***,***,***,***,*** and *** descriptions and illustrations are provided for these *** designed primers are introduced to amplify and sequence the Apn2(DNA-lyase)gene in *** on phylogenetic informativeness profiles,EF1-α,Apn2 and HIS genes are recognised as the best markers for defining species in the *** complex.

关键词： Diaporthaceae DNA-lyase Epitypification Gene discordance Generic type Molecular phylogeny New primers Phylogenetic informativeness Speciation

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