Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Phylogeny01:23

Phylogeny

45.8K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
45.8K
Phylogenetic Trees03:21

Phylogenetic Trees

46.0K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
46.0K
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

109
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
109
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

6.1K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
6.1K
Microbial Classification System01:24

Microbial Classification System

157
Classification is the process of organizing organisms into hierarchically inclusive groups based on their phenotypic similarities or evolutionary relationships. A species comprises one or more strains, and closely related species are grouped into genera. Genera are further classified into families, families into orders, orders into classes, and so forth, up to the domain level, which is the broadest taxonomic rank derived from a combination of phenotypic and genotypic data.The nomenclature of...
157
Applications of Molecular Taxonomy01:20

Applications of Molecular Taxonomy

76
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
76

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

ERGA-BGE reference genome of the Eurasian Woodcock ( <i>Scolopax rusticola</i>), a game bird species with isolated populations of conservation interest.

Open research Europe·2026
Same author

ERGA-BGE reference genome of <i>Gambusia holbrooki</i>, a globally invasive freshwater fish.

Open research Europe·2026
Same author

ERGA-BGE reference genome of <i>Xylophaga dorsalis -</i> a common deep-sea wood-boring bivalve with Atlantic-Mediterranean distribution.

Open research Europe·2026
Same author

ERGA-BGE Chromosome-Level Genome of <i>Patella rustica</i> Linnaeus, 1758: a Resource to Investigate Responses to Global Warming in the intertidal.

Open research Europe·2026
Same author

ERGA-BGE reference genome of the Azores Bullfinch - <i>Pyrrhula murina</i> Godman, 1866: an IUCN Vulnerable Species endemic to a single island in the Azores Archipelago (Portugal).

Open research Europe·2026
Same author

COVID's origins: what we do and don't know.

Nature·2026

Related Experiment Video

Updated: Aug 29, 2025

Comprehensive Workflow for the Genome-wide Identification and Expression Meta-analysis of the ATL E3 Ubiquitin Ligase Gene Family in Grapevine
10:40

Comprehensive Workflow for the Genome-wide Identification and Expression Meta-analysis of the ATL E3 Ubiquitin Ligase Gene Family in Grapevine

Published on: December 22, 2017

10.6K

A Revised Phylogenetic Classification for Viola (Violaceae).

Thomas Marcussen1, Harvey E Ballard2, Jiří Danihelka3,4

  • 1Department of Biosciences, Centre for Ecological and Evolutionary Synthesis (CEES), University of Oslo, P.O. Box 1066 Blindern, NO-0316 Oslo, Norway.

Plants (Basel, Switzerland)
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

This study presents a comprehensive taxonomic revision of the Viola genus, establishing a new classification for its 664 species based on phylogenetic and morphological data. It highlights knowledge gaps, particularly in South American taxa.

Keywords:
ViolaViolaceaefossilsmonophyleticmorphologynomenclaturephylogenypolyploidytaxonomic revision

More Related Videos

Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds
07:23

Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds

Published on: August 8, 2025

178
Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group
07:49

Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group

Published on: August 16, 2017

7.1K

Related Experiment Videos

Last Updated: Aug 29, 2025

Comprehensive Workflow for the Genome-wide Identification and Expression Meta-analysis of the ATL E3 Ubiquitin Ligase Gene Family in Grapevine
10:40

Comprehensive Workflow for the Genome-wide Identification and Expression Meta-analysis of the ATL E3 Ubiquitin Ligase Gene Family in Grapevine

Published on: December 22, 2017

10.6K
Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds
07:23

Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds

Published on: August 8, 2025

178
Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group
07:49

Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group

Published on: August 16, 2017

7.1K

Area of Science:

  • Botany
  • Plant Taxonomy
  • Phylogenetics

Background:

  • The genus *Viola* (Violaceae) is a large angiosperm genus with a complex taxonomy that has not been revised since 1925.
  • The last revision by Wilhelm Becker classified 400 species into 14 sections and numerous unranked groups.

Purpose of the Study:

  • To provide an updated, comprehensive classification of the genus *Viola* based on modern phylogenetic principles and integrated data.
  • To establish a global checklist of accepted *Viola* species and define infrageneric subdivisions.

Main Methods:

  • Phylogenetic analyses using multigene and ITS data with dense taxon sampling.
  • Integration of morphological data, chromosome counts, and ploidy information.
  • Application of modern principles of monophyly for taxonomic revisions.

Main Results:

  • A revised classification recognizing 664 species within 2 subgenera, 31 sections, and 20 subsections.
  • Establishment of one new subgenus (*Neoandinium*), six new sections, and seven new subsections.
  • Detailed accounts for each infrageneric subdivision, including descriptions, apomorphies, and distribution maps.

Conclusions:

  • The study provides a robust, modern taxonomic framework for the genus *Viola*.
  • Significant knowledge gaps exist for South American *Viola* taxa, requiring further research in phylogeny, chromosome counts, and fossil data.
  • Future studies should focus on seed anatomy and morphology to better understand the genus's fossil record and evolutionary history.