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Redefining genera of cereal pathogens: Oculimacula, Rhynchosporium and Spermospora
The taxonomy of Oculimacula, Rhynchosporium and Spermospora is re-evaluated, along with that of phylogenetically related genera . Isolates are identified using comparisons of DNA sequences of the internal transcribed spacer ribosomal RNA locus (ITS), partial translation elongation factor 1-alpha ( t...
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Published in: | Fungal systematics and evolution 2021-06, Vol.7, p.67-98 |
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Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that cite this one |
Online Access: | Get full text |
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Summary: | The taxonomy of
Oculimacula, Rhynchosporium
and
Spermospora
is re-evaluated, along with that of phylogenetically related genera
.
Isolates are identified using comparisons of DNA sequences of the internal transcribed spacer ribosomal RNA locus (ITS), partial translation elongation factor 1-alpha (
tef1
), actin (
act
), DNA-directed RNA polymerase II largest (
rpb1
) and second largest subunit (
rpb2
) genes, and the nuclear ribosomal large subunit (LSU), combined with their morphological characteristics.
Oculimacula
is restricted to two species,
O. acuformis
and
O. yallundae
, with
O. aestiva
placed in
Cyphellophora
, and
O. anguioides
accommodated in a new genus,
Helgardiomyces
.
Rhynchosporium s. str
. is restricted to species with 1-septate conidia and hooked apical beaks, while
Rhynchobrunnera
is introduced for species with 1–3-septate, straight conidia, lacking any apical beak.
Rhynchosporium graminicola
is proposed to replace the name
R. commune
applied to the barley scald pathogen based on nomenclatural priority.
Spermospora
is shown to be paraphyletic, representing
Spermospora
(type:
S. subulata
), with three new species,
S. arrhenatheri, S. loliiphila
and
S. zeae
, and
Neospermospora gen. nov
. (type:
N. avenae
)
. Ypsilina
(type:
Y. graminea
), is shown to be monophyletic, but appears to be of minor importance on cereals. Finally
, Vanderaaea gen. nov
. (type:
V. ammophilae
), is introduced as a new coelomycetous fungus occurring on dead leaves of
Ammophila arenaria
.
Citation:
Crous PW, Braun U, McDonald BA, Lennox CL, Edwards J, Mann RC, Zaveri A, Linde CC, Dyer PS, Groenewald JZ (2020). Redefining genera of cereal pathogens:
Oculimacula
,
Rhynchosporium
and
Spermospora
.
Fungal Systematics and Evolution
7:
67–98. doi: 10.3114/fuse.2021.07.04 |
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ISSN: | 2589-3823 2589-3831 |
DOI: | 10.3114/fuse.2021.07.04 |