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

Exon Recombination02:32

Exon Recombination

The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
Antibiotic Selection00:57

Antibiotic Selection

Overview

You might also read

Related Articles

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

Sort by
Same author

Insect Sex Determination: A Rapidly Shifting Evolutionary Landscape.

Current opinion in insect science·2026
Same author

Within-Host Environmental Heterogeneity Is Associated With Phenotypic but Not Genomic Diversity in Wolbachia Endosymbionts.

Environmental microbiology reports·2026
Same author

Identification of a sex-determining region potentially involved in resolving genetic conflicts over sex ratio.

Biology letters·2025
Same author

An intricate evolutionary connection between meiotic drive and sex.

Current opinion in insect science·2025
Same author

The pUL47 tegument protein of Marek's Disease Virus interacts with p32/C1QBP to promote horizontal transmission.

PLoS pathogens·2025
Same author

Elucidating the Molecular Mechanisms of Sex Ratio Distortion Mediated by Cytoplasmic Symbionts.

Genome biology and evolution·2025

Related Experiment Video

Updated: May 15, 2026

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
09:16

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity

Published on: March 25, 2020

Selection-driven extinction dynamics for group II introns in Enterobacteriales.

Sébastien Leclercq1, Richard Cordaux

  • 1Université de Poitiers, CNRS UMR 7267 Ecologie et Biologie des Interactions, Poitiers, France.

Plos One
|December 20, 2012
PubMed
Summary

Transposable elements, like bacterial group II introns, evolve via periodic extinctions and recolonizations. These introns appear deleterious to hosts, supporting a selection-driven extinction model.

More Related Videos

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System
05:06

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Published on: January 5, 2024

Related Experiment Videos

Last Updated: May 15, 2026

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
09:16

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity

Published on: March 25, 2020

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System
05:06

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Published on: January 5, 2024

Area of Science:

  • Genomics
  • Evolutionary Biology
  • Molecular Biology

Background:

  • Transposable elements (TEs) significantly drive genome evolution.
  • TEs may evolve through cycles of extinction and recolonization.
  • Bacterial group II introns are suspected to follow this model, but the specific extinction driver remains unknown.

Purpose of the Study:

  • To investigate the evolutionary dynamics of bacterial group II introns.
  • To determine whether group II introns follow a selection-driven extinction (Sel-DE) or genome saturation-driven extinction (Sat-DE) model.

Main Methods:

  • Analysis of nearly 200 group II intron copies across 90 Enterobacteriales genomes.
  • Examination of element distribution patterns, mobile genetic element acquisition, and proliferation evidence.
  • Assessment of recent and past proliferation sites and their homing sites.

Main Results:

  • Confirmed extinction-recolonization dynamics for group II introns.
  • Observed patchy distributions, acquisition via mobile elements, and recent proliferations.
  • Found evidence supporting the Sel-DE model, indicating group II introns are likely deleterious.

Conclusions:

  • Bacterial group II introns exhibit extinction-recolonization dynamics, primarily driven by selection against hosts (Sel-DE).
  • Host properties critically influence transposable element dynamics.
  • Group II introns may pose a fitness cost to their bacterial hosts.