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Related Concept Videos

Formation of Species01:31

Formation of Species

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.
Speciation Rates01:07

Speciation Rates

Overview
Genetics of Speciation02:16

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
The Evidence for Evolution02:55

The Evidence for Evolution

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.
Hybrid Zones02:29

Hybrid Zones

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.
Gene Flow02:39

Gene Flow

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

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A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
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Geographically multifarious phenotypic divergence during speciation.

Zachariah Gompert1, Lauren K Lucas, Chris C Nice

  • 1Department of Botany, University of Wyoming Laramie, Wyoming, 82071 ; Department of Biology, Texas State University San Marcos, Texas, 78666.

Ecology and Evolution
|March 28, 2013
PubMed
Summary
This summary is machine-generated.

Butterfly speciation involves multiple barriers to gene flow. Researchers studied phenotypic divergence in Lycaeides butterflies, finding differences in egg-laying and development timing that contribute to reproductive isolation.

Keywords:
Admixturebehaviorecological speciationinsect-plant interactionsphenology

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Area of Science:

  • Evolutionary biology
  • Speciation research
  • Population genetics

Background:

  • Speciation is driven by evolving barriers to gene flow between populations.
  • Understanding the number and polymorphism of these barriers is crucial but understudied.
  • The butterfly genera Lycaeides idas and Lycaeides melissa provide a model system for studying speciation.

Purpose of the Study:

  • To quantify phenotypic divergence between Lycaeides idas and Lycaeides melissa.
  • To identify potential barriers to gene flow contributing to their speciation.
  • To investigate the role of polymorphic traits in reproductive isolation.

Main Methods:

  • Field and laboratory experiments were conducted.
  • Phenotypic divergence was quantified across multiple traits.
  • Genetic distance and phenotypic variation in admixed populations were analyzed.

Main Results:

  • Significant phenotypic divergence was observed between L. idas and L. melissa.
  • Major differences were found in female oviposition preference and diapause initiation.
  • Moderate divergence was noted in mate preference, with some traits varying intraspecifically.

Conclusions:

  • Multiple phenotypic differences likely act as barriers to gene flow, promoting speciation.
  • Polymorphism in traits like mate and oviposition preference within species may facilitate or maintain divergence.
  • These findings highlight the complex interplay of traits in the speciation process.