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

Genetics of Speciation02:16

Genetics of Speciation

22.5K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
22.5K
Formation of Species01:31

Formation of Species

46.1K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
46.1K
Speciation Rates01:07

Speciation Rates

23.1K
Overview
23.1K
What is a Species?01:17

What is a Species?

51.2K
Overview
51.2K
Hybrid Zones02:29

Hybrid Zones

22.1K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
22.1K
Gene Flow02:39

Gene Flow

38.4K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
38.4K

You might also read

Related Articles

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

Sort by
Same author

ELECTROPHORETIC VARIATION IN TRIAZINE-RESISTANT AND SUSCEPTIBLE POPULATIONS OF AMARANTHUS RETROFLEXUS L.

The New phytologist·2021
Same author

CORRELATION BETWEEN SUBCELLULAR LOCATION AND PHOSPHOGLUCOSE ISOMERASE VARIABILITY.

Evolution; international journal of organic evolution·2017
Same author

EVOLUTIONARY RELATIONSHIPS IN THE OUTCROSSING DIPLOID ANNUAL SPECIES OF STEPHANOMERIA (COMPOSITAE).

Evolution; international journal of organic evolution·2017
Same author

GENETIC CONFIRMATION OF THE ORIGIN OF CLARKIA LINGULATA.

Evolution; international journal of organic evolution·2017
Same author

GENETIC AND BIOCHEMICAL CONSEQUENCES OF POLYPLOIDY IN TRAGOPOGON.

Evolution; international journal of organic evolution·2017
Same author

GENETIC EVIDENCE FOR THE HYBRID ORIGIN OF THE DIPLOID PLANT STEPHANOMERIA DIEGENSIS.

Evolution; international journal of organic evolution·2017

Related Experiment Video

Updated: Mar 1, 2026

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea
07:19

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea

Published on: November 25, 2016

12.1K

GENETIC DIVERGENCE AND GEOGRAPHIC SPECIATION IN LAYIA (COMPOSITAE).

S I Warwick1, L D Gottlieb2

  • 1Biosystematics Research Institute, Agriculture Canada, Ottawa, ON, Canada, K1A 0C6.

Evolution; International Journal of Organic Evolution
|June 1, 2017
PubMed
Summary
This summary is machine-generated.

Genetic analysis of six Layia plant species reveals gradual divergence, supporting adaptation to distinct habitats. This contrasts with rapid speciation, offering insights into plant evolution.

More Related Videos

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

722
A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica
12:01

A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica

Published on: February 20, 2012

32.2K

Related Experiment Videos

Last Updated: Mar 1, 2026

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea
07:19

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea

Published on: November 25, 2016

12.1K
A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

722
A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica
12:01

A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica

Published on: February 20, 2012

32.2K

Area of Science:

  • Plant evolutionary biology
  • Population genetics
  • Speciation research

Background:

  • Six California native Layia (Compositae) species were studied, recognized as a model for geographic speciation.
  • Previous research by Clausen, Keck, and Hiesey established Layia as a key example in plant speciation.

Purpose of the Study:

  • To test if genetic divergence in enzyme-coding genes aligns with morphological, ecological, and reproductive divergence.
  • To investigate the evolutionary pathways and genetic relationships within the Layia genus.
  • To evaluate the consistency of genetic data with gradual speciation models.

Main Methods:

  • Electrophoretic analysis of eleven enzymes encoded by 17 loci across six Layia species.
  • Calculation of genetic identity values to quantify evolutionary divergence.
  • Comparison of genetic distances between species complexes and within complexes.

Main Results:

  • Genetic identity values supported a model of gradual divergence and adaptation to separate geographic habitats.
  • Lower genetic identity was observed between proposed species complexes (e.g., L. chrysanthemoides/L. fremontii) compared to species within complexes.
  • Results contrasted with findings from species exhibiting rapid evolutionary origins.
  • Evidence for duplicate gene coding of phosphoglucomutase and NADP-dependent isocitrate dehydrogenase was found.

Conclusions:

  • Electrophoretic data support gradual speciation in Layia, driven by adaptation to distinct environments.
  • The genetic structure of Layia reflects complex evolutionary relationships, with distinct species complexes.
  • Duplicate gene coding for specific enzymes suggests potential mechanisms for evolutionary innovation in Layia.