Evaluation of various species demarcation criteria in attempts to classify ten new tombusvirus isolates

2004 ◽  
Vol 149 (9) ◽  
Author(s):  
R. Koenig ◽  
J. Th. J. Verhoeven ◽  
C. E. Fribourg ◽  
E. Pfeilstetter ◽  
D. E. Lesemann
Keyword(s):  
Species Demarcation ◽  
Demarcation Criteria

scholarly journals Lagos Bat Virus, an Under-Reported Rabies-Related Lyssavirus

Viruses ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 576 ◽  
Author(s):  
Jessica Coertse ◽  
Marike Geldenhuys ◽  
Kevin le Roux ◽  
Wanda Markotter
Keyword(s):  
Genetic Diversity ◽  
Species Demarcation ◽  
African Continent ◽  
Previous Knowledge ◽  
Related Virus ◽  
Bat Virus ◽  
History Of ◽  
Demarcation Criteria

Lagos bat virus (LBV), one of the 17 accepted viral species of the Lyssavirus genus, was the first rabies-related virus described in 1956. This virus is endemic to the African continent and is rarely encountered. There are currently four lineages, although the observed genetic diversity exceeds existing lyssavirus species demarcation criteria. Several exposures to rabid bats infected with LBV have been reported; however, no known human cases have been reported to date. This review provides the history of LBV and summarizes previous knowledge as well as new detections. Genetic diversity, pathogenesis and prevention are re-evaluated and discussed.

scholarly journals Taxonomic updates for the genus Gyrovirus (family Anelloviridae): recognition of several new members and establishment of species demarcation criteria

2021 ◽  
Author(s):  
Simona Kraberger ◽  
Tanja Opriessnig ◽  
Vladimir Celer ◽  
Fabrizio Maggi ◽  
Hiroaki Okamoto ◽  
...  
Keyword(s):  
Species Demarcation ◽  
New Members ◽  
Demarcation Criteria

scholarly journals Implementation of Objective PASC-Derived Taxon Demarcation Criteria for Official Classification of Filoviruses

Viruses ◽  
2017 ◽  
Vol 9 (5) ◽  
pp. 106 ◽  
Author(s):  
Yīmíng Bào ◽  
Gaya Amarasinghe ◽  
Christopher Basler ◽  
Sina Bavari ◽  
Alexander Bukreyev ◽  
...  
Keyword(s):  
Demarcation Criteria

scholarly journals Bunyavirus Taxonomy: Limitations and Misconceptions Associated with the Current ICTV Criteria Used for Species Demarcation

2018 ◽  
Vol 99 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Bradley J. Blitvich ◽  
Barry J. Beaty ◽  
Carol D. Blair ◽  
Aaron C. Brault ◽  
Gerhard Dobler ◽  
...  
Keyword(s):  
Species Demarcation

Noun Phrase or Compound Noun? An Investigation of N + A and N + N Boundary Cases in Persian

2016 ◽  
Vol 6 (8) ◽  
pp. 1687
Author(s):  
Shahram Peyman ◽  
Vali Rezai
Keyword(s):  
Noun Phrase ◽  
Noun Phrases ◽  
Special Focus ◽  
Demarcation Criterion ◽  
Compound Nouns ◽  
Almost All ◽  
Demarcation Criteria

The present study seeks to investigate the demarcation between noun phrases (NPs) and compound nouns (CNs) in Persian at the syntax-morphology interface. This objective is accomplished through the examination of two most complex nominal patterns, viz. N + A, N + N, with special focus on boundary cases, i.e. the intermediate constructs which possess some properties of both NPs and CNs simultaneously and thus demonstrate contradictory reactions to the various NP-CN demarcation criteria. The results indicate that boundary cases ensue from partial syntactic erosion of NPs through pure lexicalization, whereby NPs turn into CNs without center-switching or category change. This study also shows that almost all boundary cases have no potential for syntactic modification of their elements. It is further demonstrated that N + A and N + N boundary cases are endocentric, head-initial constructs with optional or obligatory internal inflection as well as Ezafe. Syntactic modifiability is also introduced as the most efficient NP-CN demarcation criterion in Persian since it is the first property lost in NP lexicalization process.

scholarly journals Carl Sagan: Etička pitanja

2018 ◽  
Vol 41 (18) ◽  
Author(s):  
Josip Ćirić
Keyword(s):  
Ethical Issues ◽  
Life On Earth ◽  
Demarcation Criteria ◽  
Project Search

The aim of this paper is to present dr. Carl Sagan's ethical issues within his own exobiological researches, and the criticism of such a view. We shall start from Dr. Sagan's anthropological definition where his view on intelligence as demarcation criteria between species, ecological issues on preservation of life on Earth, terraforming, exobiology, and SETI project (search for extraterrestrial intelligencies), up to the abortion controversy, will be set forth.

scholarly journals The difference between falsificationistic and verificationistic principles of demarcation

2019 ◽  
Vol 62 (1) ◽  
pp. 77-90
Author(s):  
Andjela Bolta
Keyword(s):  
Freudian Psychoanalysis ◽  
The Difference ◽  
Demarcation Criteria ◽  
Better Than

This paper illustrates the difference between falsificationistic and verificationistic principles of demarcation. Popper claimed that the falsificationistic criterion of demarcation is better than the verificationistic one. Therefore, he believed that his criterion should be more relevant when distinguishing scientific from nonscientific theories. Popper gave Freudian psychoanalysis as an example of a doctrine that would satisfy verificationistic, but not the falsificationistic criterion of demarcation. The aim of this paper is to thoroughly examine in which way both of demarcation criteria would treat psychoanalysis and to check if Popper?s criterion of demarcation is truly better than the verificationistic one.

scholarly journals Metagenomic Analyses of Nepoviruses: Diversity, Evolution and Identification of a Hitherto Undescribed Putative Region for Host Range in Subgroup a Species

2021 ◽  
Author(s):  
jean-michel hily ◽  
Nils Poulicard ◽  
Julie Kubina ◽  
Jean-sebastien Reynard ◽  
Anne-Sophie Spilmont ◽  
...  
Keyword(s):  
Host Range ◽  
High Throughput Sequencing ◽  
Plant Viruses ◽  
Terminal Segment ◽  
Phylogeographic Structure ◽  
Sequence Information ◽  
Arabis Mosaic Virus ◽  
Reading Frame ◽  
Virus Diversity ◽  
Demarcation Criteria

Abstract Datamining and metagenomic analyses of 277 open reading frame sequences of bipartite RNA viruses and variants in the genus Nepovirus documented how delicate it can be to unequivocally identify species, in particular subgroup A and C species, based on some of the currently adopted taxonomic demarcation criteria. It suggests a possible need for their amendment to accommodate pangenome information. In addition, we revealed a host-dependent structure of arabis mosaic virus (ArMV) populations at a cladistic level and confirmed a phylogeographic structure of grapevine fanleaf virus (GFLV) populations. We also identified new putative recombinant events for species of subgroups A, B and C. The evolutionary specificity of some capsid regions of ArMV and GFLV that were previously described and biologically validated as vector determinant was circumscribed in silico. Furthermore, a C-terminal segment of the RNA-dependent RNA polymerase of subgroup A species was predicted as a putative host range determinant based on statistically supported higher π values for GFLV and ArMV isolates infecting Vitis spp. compared to non-Vitis infecting ArMV isolates. This study illustrated how sequence information obtained via high throughput sequencing can increase our understanding of mechanisms that modulate virus diversity and evolution and create new opportunities for advancing studies on the biology of economically important plant viruses.

scholarly journals Genetic Diversity of Potyviruses Associated with Tulip Breaking Syndrome

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1807
Author(s):  
János Ágoston ◽  
Asztéria Almási ◽  
Katalin Salánki ◽  
László Palkovics
Keyword(s):  
Phylogenetic Analyses ◽  
Viral Disease ◽  
International Committee ◽  
Rt Pcr ◽  
Virus Identification ◽  
Detection Program ◽  
Potyvirus Species ◽  
Tulip Breaking Virus ◽  
Demarcation Criteria ◽  
Taxonomic Relations

Tulip breaking is economically the most important viral disease of modern-day tulip growing. It is characterized by irregular flame and feather-like patterns in the flowers and mosaic on the foliage. Thirty-two leaf samples were collected from cultivated tulip plants showing tulip breaking syndrome from Hungary in 2017 and 2018. Virus identification was performed by serological (ELISA) and molecular (RT-PCR) methods. All samples proved to be infected with a potyvirus and evidence was provided that three potyvirus species could be identified in the samples: Lily mottle virus (LMoV), Tulip breaking virus (TBV) and Rembrandt tulip-breaking virus (ReTBV). Recombination prediction accomplished with Recombination Detection Program (RDP) v4.98 revealed potential intraspecies recombination in the case of TBV and LMoV. Phylogenetic analyses of the coat protein (CP) regions proved the monophyletic origin of these viruses and verified them as three different species according to current International Committee on Taxonomy of Viruses (ICTV) species demarcation criteria. Based on these results, we analyzed taxonomic relations concerning potyviruses associated with tulip breaking syndrome. We propose the elevation of ReTBV to species level, and emergence of two new subgroups in ReTBV.

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