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Multigene phylogeny and taxonomy of the genus Melanconiella(Diaporthales)

Fungal Diversity 2012年第6期57卷 1-44页

作者： Hermann Voglmayr Amy Y.Rossman Lisa A.Castlebury Walter M.Jaklitsch Department of Systematic and Evolutionary Botany Faculty Centre of BiodiversityUniversity of ViennaRennweg 141030WienAustria Systematic Mycology&Microbiology Laboratory USDAAgricultural Research ServiceB010A10300 Baltimore AveBeltsvilleMD 20705USA

Molecular phylogenetic analyses of LSU rDNA demonstrate monophyly of the genus Melanconiella,and its status as a genus distinct from Melanconis is *** of macro-and microscopic morphology,pure cultures and phylogenetic analyses of partial SSU-ITS-LSU rDNA,tef1 and rpb2 sequences revealed 13 distinct species of Melanconiella,six of which are described as new(***,***,***,***,***,***).Melanconiella hyperopta *** is described as a new *** carpinicola,***,***,*** and *** are formally combined into *** name Melanconiella chrysostroma is excluded from Melanconiella,as it is an obligate synonym of Wuestneia *** type of Melanconiella is confirmed as *** species are lecto-and/or epitypified.A key to all treated species ofMelanconiella is provided,and the circumscriptions of the genera Melanconis and Melanconiella are *** Melanconiella species revealed by molecular phylogenetic analyses can be well characterised by a suite of morphological traits including ascospore shape,length and width,colour,absence/presence and shape of appendages and the ***-teleomorph connections were confirmed by pure culture and DNA data,revealing the presence of a single melanconium-or discosporina-like anamorph for each *** growth was found to be characteristic of the respective *** is shown to be confined to the host family Betulaceae,and all species are found to be highly host-specific,mostly confined to a single host *** biodiversity ofMelanconiella was determined to be centred on the genus Carpinus with nine species,five of which have been confirmed on *** appears to be the geographic centre of Melanconiella biodiversity.

关键词： High diversity Host specificity melanconidaceae Molecular phylogeny New species Pathogen Systematics

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