Adaptation, speciation and hybrid zones

@article{Barton1989AdaptationSA,
  title={Adaptation, speciation and hybrid zones},
  author={Nicholas H. Barton and Godfrey M. Hewitt},
  journal={Nature},
  year={1989},
  volume={341},
  pages={497-503}
}
Many species are divided into a mosaic of genetically distinct populations, separated by narrow zones of hybridization. Studies of hybrid zones allow us to quantify the genetic differences responsible for speciation, to measure the diffusion of genes between diverging taxa, and to understand the spread of alternative adaptations. 
Bimodal hybrid zones and speciation.
  • Jiggins, Mallet
  • Biology, Medicine
  • Trends in ecology & evolution
  • 2000
TLDR
This continuum of stable contact zones provides empirical evidence for a route to speciation, which does not require allopatry, and ecological divergence across most bimodal hybrid zones suggests that ecology contributes more to Speciation than genomic incompatibility. Expand
Evolutionary consequences of diploid-polyploid hybrid zones in wild species.
TLDR
It is shown that introgression might counteract the evolution of isolating mechanisms in diploid-polyploid contact zones, and tests of hypotheses relating to the dynamics and evolution of polyploid complexes are carried out. Expand
A landscape genetics perspective on the spatial dynamics of hybridization between two species of wall lizards
TLDR
The results suggest a strong influence of a geographic barrier that seems to limit the contact between the two species, and some support to Haldane’s rule suggesting the reduced hybrid female fertility, although not complete unviability. Expand
Genetic, morphological and ecological variation across a sharp hybrid zone between two alpine butterfly species
TLDR
Two alpine butterfly species, Coenonympha macromma and C. gardetta, which can be found flying together and hybridizing in narrow contact zones in the southern French Alps are studied. Expand
Evolution of mosaic hybrid zone between invasive and endemic species of Cyprinidae through space and time
TLDR
Analysis of morphology, allozymes and mtDNA sequences revealed that the hybridization between these two cyprinids takes different forms in the same river. Expand
Estimating gene flow across hybrid zones: how reliable are microsatellites?
Due to their high polymorphism, microsatellites have become one of the most valued genetic markers in population biology.
Evolutionary and ecological consequences of interspecific hybridization in cladocerans
The evolutionary process of interspecific hybridization in cladocerans is reviewed based on ecological and population genetic data. The evolutionary consequences of hybridization, biogeographicExpand
LOW INTRASPECIFIC VARIATION FOR GENOMIC ISOLATION BETWEEN HYBRIDIZING SUNFLOWER SPECIES
TLDR
The observed consistency of introgression patterns across distantly separated hybrid zones suggests that intrinsic forces predominate in determining hybrid zone dynamics and boundaries between these sunflower species. Expand
LOW INTRASPECIFIC VARIATION FOR GENOMIC ISOLATION BETWEEN HYBRIDIZING SUNFLOWER SPECIES
TLDR
The observed consistency of introgression patterns across distantly separated hybrid zones suggests that intrinsic forces predominate in determining hybrid zone dynamics and boundaries between these sunflower species. Expand
Evolution: A New Cat Species Emerges
The complex ongoing process of species development is highlighted by the description of a new felid species, Leopardus guttulus, from Brazil. Broad molecular genetic assessments affirm reproductiveExpand
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References

SHOWING 1-10 OF 59 REFERENCES
Hybrid zones-natural laboratories for evolutionary studies.
  • G. Hewitt
  • Biology, Medicine
  • Trends in ecology & evolution
  • 1988
TLDR
An understanding of the origins, evolution, dynamics and fates of these hybrid zone patchworks requires information from a multitude of lines of enwuiry, including taxonomy, genetics, molecular biology, ethology, ecology, biogeography and palaeoclimatology. Expand
Speciation as a Stage in Evolutionary Divergence
TLDR
A theory is suggested according to which the development of isolating mechanisms follows, rather than accompanies, that of the adaptive complexes themselves, which suggests that speciation is meant the fixation of discontinuity among organisms. Expand
Speciation and Its Consequences
TLDR
The purpose of this book is to illustrate how different patterns of speciation and differentiation have occurred among diverse taxa. Expand
Genetical and ecological differentiation across a hybrid zone
ABSTRACT. 1 There is a narrow hybrid zone between two chromosomal races of the grasshopper Podisma pedestris (L.) in the French Alps. 2 There are no gross differences in habitat across the zone, andExpand
Gene flow across a chromosomal tension zone. I. Relicts of ancient hybridization
TLDR
Two parapatric subspecies of grasshopper with extensive karyotypic differences form a hybrid zone in which the change-over of chromosomal characters occurs over a distance of 800 m, it is proposed that these markers are relicts of ancient hybridization between the Moreton and Torresian subspecies. Expand
Microgeographical Variation in Allozyme Frequencies in Avena barbata.
  • J. Hamrick, R. Allard
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1972
TLDR
It is concluded that the observed patterns of variation are best explained by Neo-Darwinian evolutionary models, in which selection plays a predominant role. Expand
FURTHER GENETIC ANALYSES OF A HYBRID ZONE BETWEEN LEOPARD FROGS (RANA PIPIENS COMPLEX) IN CENTRAL TEXAS
  • T. Kocher, R. Sage
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 1986
Additional animals were collected from a previously described hybrid zone between two species of leopard frogs. The material now includes 1,054 specimens collected over a five‐year period. The newExpand
THE DISTRIBUTION OF POSTMATING REPRODUCTIVE ISOLATING GENES IN POPULATIONS OF THE YELLOW MONKEY FLOWER, MIMULUS GUTTATUS
TLDR
The results indicate that the spread of postmating reproductive isolating genes through drift, selection, or hitchhiking could readily cause reproductive isolation to evolve in this species. Expand
An Evaluation of Narrow Hybrid Zones in Vertebrates
  • W. Moore
  • Biology
  • The Quarterly Review of Biology
  • 1977
TLDR
The hybrid-superiority hypothesis states that hybrids are more fit than parental phenotypes in some environments, and it is suggested that stable hybrid zones are often narrow because they tend to occur in ecotones which are themselves narrow. Expand
Geographic Variation, Speciation and Clines.
TLDR
Professor Endler shows how geographic differentiation and speciation may develop in spite of continuous gene flow, and considers the interpretation of natural clines and the associated geographic patterns of subspecies and species. Expand
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