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

The Evidence for Evolution02:55

The Evidence for Evolution

43.2K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
43.2K
Speciation Rates01:07

Speciation Rates

21.3K
Overview
21.3K
Evolution of Major Life Forms01:27

Evolution of Major Life Forms

1
Evolution of Major Life FormsThe evolution of major life forms tells how life developed from simple organisms to complex creatures over billions of years. It reveals key changes that led to the rise of diverse species and ecosystems. Fossils, DNA evidence, and structural comparisons help scientists trace these changes and understand the origins of important traits like multicellularity, limbs, lungs, and feathers. These evolutionary steps show how life adapted to new environments and...
1
Convergent Evolution01:54

Convergent Evolution

28.2K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
28.2K
Genetic Drift03:33

Genetic Drift

40.3K
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.
40.3K
What is Evolutionary History?02:35

What is Evolutionary History?

38.8K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
38.8K

You might also read

Related Articles

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

Sort by
Same author

The biogeographic and evolutionary history of Leiosauridae lizards reveal the influence of complex environmental and geological past dynamics in the Neotropical biomes.

Molecular phylogenetics and evolution·2026
Same author

How ecological opportunity drives asymmetric phenotypic diversity in the gartersnakes, watersnakes, and allies (Natricidae:Thamnophiini).

Systematic biology·2026
Same author

Telomere-to-telomere reference genome of the common five-lined skink, Plestiodon fasciatus (Squamata: Scincidae).

G3 (Bethesda, Md.)·2025
Same author

Habitat use, selection, and population density of chameleon communities (Calumma spp.) in the fragmented central highlands forests of Madagascar.

BMC ecology and evolution·2025
Same author

An updated survey of molecular diversity in Madagascar's velvet geckos, genus Blaesodactylus, with description of a new species from the islands arid West.

Zootaxa·2025
Same author

Pleistocene speciation and isolation-by-distance within North American mud and rainbow snakes.

Molecular phylogenetics and evolution·2025
Same journal

Superorganismal Anisogamy: A Comparative Test of an Extended Theory.

Evolution; international journal of organic evolution·2026
Same journal

The role of microbial resource mutualists in plant adaptation to abiotic environments.

Evolution; international journal of organic evolution·2026
Same journal

Museum genomics links MC1R alleles to adaptive winter coat color polymorphism in the long-tailed weasel.

Evolution; international journal of organic evolution·2026
Same journal

Repeated evolution of iridescence and hindwing tails is associated with morphometric flight proxies in skipper butterflies.

Evolution; international journal of organic evolution·2026
Same journal

Temperature-dependent competition predicts contrasting outcomes of adjacent secondary contact zones in darters (Percidae:Etheostoma).

Evolution; international journal of organic evolution·2026
Same journal

Sex allocation of hermaphrodites in metapopulations with frequent population extinction and recolonization.

Evolution; international journal of organic evolution·2026
See all related articles

Related Experiment Video

Updated: Aug 13, 2025

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks
08:51

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

Published on: May 13, 2016

14.1K

Widespread reticulate evolution in an adaptive radiation.

Dylan DeBaun1, Nirhy Rabibisoa2, Achille P Raselimanana3,4

  • 1American Museum of Natural History, New York, NY, United States.

Evolution; International Journal of Organic Evolution
|January 23, 2023
PubMed
Summary
This summary is machine-generated.

Hybrid speciation is a significant evolutionary force, contributing to 28% of Malagasy gemsnake diversity over 22 million years. These reticulation events show consistent accumulation over time, even when bifurcating speciation slows.

Keywords:
adaptive radiationhybridizationintrogressionnetworkssnakes

More Related Videos

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton
08:02

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Published on: May 7, 2016

9.9K
In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples
07:24

In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples

Published on: August 31, 2018

7.1K

Related Experiment Videos

Last Updated: Aug 13, 2025

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks
08:51

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

Published on: May 13, 2016

14.1K
Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton
08:02

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Published on: May 7, 2016

9.9K
In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples
07:24

In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples

Published on: August 31, 2018

7.1K

Area of Science:

  • Evolutionary Biology
  • Genomics
  • Speciation Studies

Background:

  • Phylogenetic studies traditionally assume bifurcating evolutionary processes.
  • Hybrid speciation and introgression are increasingly recognized but understudied at deep evolutionary timescales.
  • Previous hybrid inference studies were limited to small taxa groups.

Purpose of the Study:

  • To investigate the prevalence and impact of reticulation events in the evolutionary history of Malagasy gemsnakes (Pseudoxyrhophiinae).
  • To identify instances of introgression within this adaptive radiation.
  • To explore trends in hybridization across deep time scales.

Main Methods:

  • Phylogenetic network inference using multiple methods.
  • Analysis of gene tree discordance.
  • Mapping reticulation events onto the evolutionary timescale of 109 gemsnake species.

Main Results:

  • Identified 12 reticulation events in the 22-million-year history of Malagasy gemsnakes.
  • Reticulations account for 28% of the group's diversity, including a major radiation event.
  • Hybridization occurred between geographically and ecologically similar lineages along a north-south axis.
  • Spatial signatures of introgression persist in younger hybrid lineages.
  • Reticulation events accumulated consistently over time, independent of bifurcating speciation rates.

Conclusions:

  • Hybrid speciation is a substantial driver of diversity in Malagasy gemsnakes.
  • Hybridization may be a more robust speciation mechanism than bifurcating processes under certain environmental conditions.
  • Reticulation events are significant at deep evolutionary timescales and contribute substantially to adaptive radiations.