In:
MycoKeys, Pensoft Publishers, Vol. 99 ( 2023-10-03), p. 227-250
Abstract:
Samsoniella is a ubiquitous genus of cosmopolitan arthropod-pathogenic fungi in the family Cordycipitaceae. The fungi have economic, medicinal, and ecological importance. Prior taxonomic studies of these fungi relied predominantly on phylogenetic inferences from five loci, namely, the nuclear ribosomal small and large subunits (nr SSU and nr LSU), the 3’ portion of translation elongation factor 1 alpha (3P_ TEF ), and RNA polymerase II subunits 1 and 2 ( RPB1 and RPB2 ). Despite many new species being described, not all of the recognized species inside this group formed well-supported clades. Thus, the search for new markers appropriate for molecular phylogenetic analysis of Samsoniella remains a challenging problem. In our study, we selected the internal transcribed spacer regions of the rDNA (ITS rDNA) and seven gene regions, namely, 3P_ TEF , the 5’ portion of translation elongation factor 1 alpha (5P_ TEF ), RPB1 , RPB2 , γ-actin ( ACT ), β-tubulin ( TUB ), and a gene encoding a minichromosome maintenance protein ( MCM7 ), as candidate markers for species identification. Genetic divergence comparisons showed that the ITS, RPB2 , ACT , and TUB sequences provided little valuable information with which to separate Samsoniella spp. In contrast, sequence data for 3P_ TEF , 5P_ TEF , RPB1 , and MCM7 provided good resolution of Samsoniella species. The phylogenetic tree inferred from combined data (5P_ TEF + 3P_ TEF + RPB1 + MCM7 ) showed well-supported clades for Samsoniella and allowed for the delimitation of 26 species in this genus. The other two species ( S. formicae and S. lepidopterorum ) were not evaluated, as they had abundant missing data.
Type of Medium:
Online Resource
ISSN:
1314-4049
,
1314-4057
DOI:
10.3897/mycokeys.99.106474
DOI:
10.3897/mycokeys.99.106474.figure1
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10.3897/mycokeys.99.106474.figure2
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10.3897/mycokeys.99.106474.figure3
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10.3897/mycokeys.99.106474.figure4
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10.3897/mycokeys.99.106474.figure5
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10.3897/mycokeys.99.106474.figure6
DOI:
10.3897/mycokeys.99.106474.suppl1
DOI:
10.3897/mycokeys.99.106474.suppl2
DOI:
10.3897/mycokeys.99.106474.suppl3
DOI:
10.3897/mycokeys.99.106474.suppl4
Language:
Unknown
Publisher:
Pensoft Publishers
Publication Date:
2023
detail.hit.zdb_id:
2630648-7
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