FABI Articles : Neotypification of Dothistroma septosporum and epitypification of D. pini, causal agents of Dothistroma needle blight of pine
previous pageNeotypification of Dothistroma septosporum and epitypification of D. pini, causal agents of Dothistroma needle blight of pine
I. Barnes, A. van der Nest, M. S. Mullett, P. W. Crous, R. Drenkhan, D. L. Musolin, M. J. Wingfield
Summary
Dothistroma needle blight (DNB) is one of the most devastating needle diseases on Pinus spp. worldwide. Ever since the description of the causal agent of the disease in Europe in 1911 asCytosporina septospora, and independently in the USA in 1941 as Dothistroma pini,
there has been considerable taxonomic discordance regarding the name of
the pathogen used in literature. This was compounded both by the
proposal of different varieties of the pathogen based on differences in
spore size and the application of dual nomenclature where three names, Scirrhia pini, Eruptio piniand Mycosphaerella pini, were
used to describe the sexual morph of the fungus. More recent studies
using sequence-based methods revealed that DNB can be caused by either
one of two distinct species, that is D. septosporum and D. pini.
These important species have not been adequately typified, and this
perpetuates lack of stability for their names. In this study, these
names are fixed to reference sequences linked to living cultures
representing type specimens. To achieve this goal, we designate an
epitype for D. pini and a neotype for D. septosporum. The
known polymorphism in the ITS region, the barcoding gene for these
fungi, is characterized and a complete taxonomic history is provided for
the genus Dothistroma.
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