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

Gene Flow02:39

Gene Flow

38.2K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
38.2K
Gene Conversion02:08

Gene Conversion

10.7K
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
10.7K
Gene Conversion02:08

Gene Conversion

3.2K
3.2K
Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

64.8K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
64.8K
Genetic Drift03:33

Genetic Drift

44.4K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
44.4K
Exon Recombination02:32

Exon Recombination

4.2K
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...
4.2K

You might also read

Related Articles

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

Sort by
Same author

The genome sequence of the Yellow-legged Gull, <i>Larus michahellis</i> Naumann, 1840.

Wellcome open research·2025
Same author

Cycles of fusion and fission enabled rapid parallel adaptive radiations in African cichlids.

Science (New York, N.Y.)·2023
Same author

Genomic architecture of adaptive radiation and hybridization in Alpine whitefish.

Nature communications·2022
Same author

Genomic changes underlying repeated niche shifts in an adaptive radiation.

Evolution; international journal of organic evolution·2022
Same author

Reply to "Re-evaluating the evidence for facilitation of stickleback speciation by admixture in the Lake Constance basin".

Nature communications·2021
Same author

Admixture between old lineages facilitated contemporary ecological speciation in Lake Constance stickleback.

Nature communications·2019

Related Experiment Video

Updated: Feb 24, 2026

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
10:08

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis

Published on: August 12, 2019

17.7K

Adaptation despite gene flow? Low recombination helps.

David A Marques1,2

  • 1Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.

Molecular Ecology
|August 25, 2017
PubMed
Summary
This summary is machine-generated.

Low recombination rates protect adapted fish populations from harmful gene flow. This study shows how genomic regions with low recombination help maintain distinct ecotypes in threespine stickleback, aiding adaptation.

Keywords:
adaptationgene flowrecombinationspeciationspeciation continuumthreespine stickleback

More Related Videos

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
06:18

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

942
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

1.4K

Related Experiment Videos

Last Updated: Feb 24, 2026

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
10:08

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis

Published on: August 12, 2019

17.7K
Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
06:18

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

942
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

1.4K

Area of Science:

  • Evolutionary biology
  • Population genetics
  • Genomics

Background:

  • Post-glacial colonization led to rapid adaptation in species like the threespine stickleback.
  • Threespine stickleback have evolved diverse ecotypes with complex phenotypes and life histories in various habitats.
  • Previous research identified multiple genes involved in ecotype divergence.

Purpose of the Study:

  • To investigate mechanisms protecting well-adapted ecotypes from maladaptive gene flow.
  • To test the role of genomic recombination rates in maintaining ecotype integrity.
  • To provide empirical support for theoretical predictions on low recombination regions in adaptation.

Main Methods:

  • Meta-analysis of population genomic data from threespine stickleback.
  • Examination of genome-wide recombination rate variation.
  • Assessment of linkage disequilibrium in relation to adaptive variants.

Main Results:

  • Regions with low rates of genetic recombination protect against maladaptive gene flow between ecotypes.
  • Variation in recombination rates across the genome plays a significant role in maintaining ecotype differentiation.
  • This finding supports theoretical models on the importance of low recombination regions in adaptation.

Conclusions:

  • Low recombination regions act as barriers to gene flow, preserving adaptive genetic variation.
  • Genomic architecture, specifically recombination rate variation, is crucial for species adaptation and speciation.
  • The study offers insights into the evolution of genome structure and its impact on adaptability.