Unveiling Gymnosporangium corniforme , G . unicorne , and G. niitakayamense sp. nov. in Taiwan

Shen, Yu-Zen; Chung, Wen‐Hsin; Huang, Tung-Chin; Rodeva, R.; Hung, Ting‐Hsuan

doi:10.1016/j.myc.2017.11.003

Cited by 9 publications

(9 citation statements)

References 38 publications

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“…In this study, the microsatellites were highly transferable to G. unicorne , and the analysis of some of the SSR markers used for cross‐amplification in other taxa indicated that organisms that are genetically closer have high‐to‐moderate levels of transferability, from which it can be inferred that G. unicorne and G. asiaticum are genetically closer (Dracatos et al, 2006). Molecular systematic taxonomy also confirms this (Shen et al, 2018; Zhao et al, 2016). SSRs have lower specific internal transfer capacity in fungi compared with other organisms (Barbará et al, 2007).…”

Section: Discussionmentioning

confidence: 53%

Development of SSR markers from transcriptome data for the pear rust pathogenGymnosporangium asiaticum

Weng

Tao

Liang

2020

Journal of Phytopathology

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The pear‐cypress rust Gymnosporangium asiaticum is one of the most significant causal agents of pear rust in Asian pear, severely affecting the pear industry. Research on the genetic diversity of this widespread pathogen has been hampered due to the absence of molecular markers. In the current study, we developed 16 novel microsatellite markers for G. asiaticum from transcriptome data by combining next‐generation sequencing and PCR screening. These polymorphic markers were tested on 96 individuals from nine provinces in China. The number of alleles for these markers ranged from two to nine, with an average of five at each locus. The polymorphic information content ranged from 0.0411 to 0.7666, with an average of 0.4417. In addition, the observed (HO) and expected (HE) heterozygosities were 0.0312–0.6941 and 0.0417–0.8000, respectively. We also observed low‐to‐moderate levels of genetic differentiation and extremely significant gene flow between the nine provinces. Of these 16 developed simple sequence repeat loci, 11 were transferable to other Gymnosporangium species. These new microsatellite markers can be used in future large‐scale studies of the genetic structure and diversity of G. asiaticum.

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Section: Discussionmentioning

confidence: 53%

Development of SSR markers from transcriptome data for the pear rust pathogenGymnosporangium asiaticum

Weng

Tao

Liang

2020

Journal of Phytopathology

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“…In addition, the following new species were described from China: Gymnosporangium huanglongense (Cao et al, 2016) and Gymnosporangium przewalskii (Cao et al, 2017). nov. have been reported in Taiwan (Shen et al, 2018). nov. have been reported in Taiwan (Shen et al, 2018).…”

Section: Conclusion Of Pest Categorisation (Section 4)mentioning

confidence: 97%

“…Gymnosporangium corniforme and Gymnosporangium niitakayamense sp. nov. have been reported in Taiwan (Shen et al., ).…”

Section: Pest Categorisationmentioning

confidence: 99%

“…Cao et al, 2016Cao et al, , 2017Shen et al, 2018). Cao et al, 2016Cao et al, , 2017Shen et al, 2018).…”

Section: Detection and Identification Of The Pestunclassified

“…The telial host of G. libocedri is Libocedrus decurrens. Other incidental aecial hosts or known aecial hosts not rated for their susceptibility include (Aldwinckle, 1990;Helfer, 2005;EPPO, 2006EPPO, , 2018Yun et al, 2009;Xu et al, 2013;Cao et al, 2016Cao et al, , 2017Shen et al, 2018): Amelanchier spp., Aronia spp., Chaenomeles spp., Cotoneaster spp., Malus sylvestris, Mespilus spp., Photinia spp., Photinia niitakayamensis, Pyrus spp., Pyrus calleryana, P. communis, Pyrus ussuriensis, Sorbus spp., Sorbus alnifolia and Sorbus koehneana. Telial hosts of non-EU Gymnosporangium spp.…”

Section: Host Rangementioning

confidence: 99%

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Pest categorisation of Gymnosporangium spp. (non‐EU)

Bragard¹,

Serio²,

Gonthier³

et al. 2018

EFS2

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Following a request from the European Commission, the EFSA Panel on Plant Health performed a pest categorisation of Gymnosporangium spp. (non-EU), a well-defined and distinguishable group of fungal plant pathogens of the family Pucciniaceae affecting woody species. Many different Gymnosporangium species are recognised, of which at least 14 species are considered not to be native in the European Union. All the non-EU Gymnosporangium species are not known to be present in the EU and are regulated in Council Directive 2000/29/EC (Annex IAI) as harmful organisms whose introduction into the EU is banned. Gymnosporangium spp. are biotrophic obligate plant pathogens. These rust fungi are heteroecious as they require Juniperus, Libocedrus, Callitropsis, Chamaecyparis or Cupressus (telial hosts) and rosaceous plants of subfamily Pomoideae (aecial hosts) to complete their life cycle. The pathogens could enter the EU via host plants for planting (including artificially dwarfed woody plants) and cut branches. They could establish in the EU, as climatic conditions are favourable and hosts are common. They would be able to spread following establishment by movement of host plants for planting and cut branches, as well as by natural dispersal. Should Gymnosporangium spp. (non-EU) be introduced in the EU, impacts can be expected in orchards, ornamental trees and nurseries. On telial hosts, these pathogens cause galls on stems, twigs and branches, and fusiform swellings on stems. Foliar infections on aecial hosts may lead to severe defoliations. The main knowledge gap concerns the limited available information on the biology, distribution range and impact of several non-EU Gymnosporangium spp. The criteria assessed by the Panel for consideration of Gymnosporangium spp. (non-EU) as potential quarantine pests are met, while, for regulated non-quarantine pests, the criterion on the pest presence in the EU is not met.

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Notes, outline and divergence times of Basidiomycota

et al. 2019

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The Basidiomycota constitutes a major phylum of the kingdom Fungi and is second in species numbers to the Ascomycota. The present work provides an overview of all validly published, currently used basidiomycete genera to date in a single document. An outline of all genera of Basidiomycota is provided, which includes 1928 currently used genera names, with 1263 synonyms, which are distributed in 241 families, 68 orders, 18 classes and four subphyla. We provide brief notes for each accepted genus including information on classification, number of accepted species, type species, life mode, habitat, distribution, and sequence information. Furthermore, three phylogenetic analyses with combined LSU, SSU, 5.8s, rpb1, rpb2, and ef1 datasets for the subphyla Agaricomycotina, Pucciniomycotina and Ustilaginomycotina are conducted, respectively. Divergence time estimates are provided to the family level with 632 species from 62 orders, 168 families and 605 genera. Our study indicates that the divergence times of the subphyla in Basidiomycota are 406–430 Mya, classes are 211–383 Mya, and orders are 99–323 Mya, which are largely consistent with previous studies. In this study, all phylogenetically supported families were dated, with the families of Agaricomycotina diverging from 27–178 Mya, Pucciniomycotina from 85–222 Mya, and Ustilaginomycotina from 79–177 Mya. Divergence times as additional criterion in ranking provide additional evidence to resolve taxonomic problems in the Basidiomycota taxonomic system, and also provide a better understanding of their phylogeny and evolution.

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Unveiling Gymnosporangium corniforme , G . unicorne , and G. niitakayamense sp. nov. in Taiwan

Cited by 9 publications

References 38 publications

Development of SSR markers from transcriptome data for the pear rust pathogenGymnosporangium asiaticum

Development of SSR markers from transcriptome data for the pear rust pathogenGymnosporangium asiaticum

Pest categorisation of Gymnosporangium spp. (non‐EU)

Notes, outline and divergence times of Basidiomycota

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