RELATIVE CONTRIBUTION OF DISPERSAL AND NATURAL SELECTION TO THE MAINTENANCE OF A HYBRID ZONE IN LITTORINA

Evolution ◽  
2004 ◽  
Vol 58 (12) ◽  
pp. 2734 ◽  
Author(s):  
Raquel Cruz ◽  
Carlos Vilas ◽  
Javier Mosquera ◽  
Carlos García
Keyword(s):  
Natural Selection ◽  
Hybrid Zone ◽  
Relative Contribution

scholarly journals RELATIVE CONTRIBUTION OF DISPERSAL AND NATURAL SELECTION TO THE MAINTENANCE OF A HYBRID ZONE IN LITTORINA

Evolution ◽  
2004 ◽  
Vol 58 (12) ◽  
pp. 2734-2746 ◽  
Author(s):  
Raquel Cruz ◽  
Carlos Vilas ◽  
Javier Mosquera ◽  
Carlos García
Keyword(s):  
Natural Selection ◽  
Hybrid Zone ◽  
Relative Contribution

Natural Selection on Quantitative Traits in the Bombina Hybrid Zone

Evolution ◽  
1995 ◽  
Vol 49 (6) ◽  
pp. 1224 ◽  
Author(s):  
Beate Nurnberger ◽  
Nick Barton ◽  
Catriona MacCallum ◽  
Jason Gilchrist ◽  
Michael Appleby
Keyword(s):  
Natural Selection ◽  
Hybrid Zone ◽  
Quantitative Traits

scholarly journals NATURAL SELECTION ON QUANTITATIVE TRAITS IN THE BOMBINA HYBRID ZONE

Evolution ◽  
1995 ◽  
Vol 49 (6) ◽  
pp. 1224-1238 ◽  
Author(s):  
Beate Nürnberger ◽  
Nick Barton ◽  
Catriona MacCallum ◽  
Jason Gilchrist ◽  
Michael Appleby
Keyword(s):  
Natural Selection ◽  
Hybrid Zone ◽  
Quantitative Traits

Strong Natural Selection in a Warning-Color Hybrid Zone

Evolution ◽  
1989 ◽  
Vol 43 (2) ◽  
pp. 421 ◽  
Author(s):  
James Mallet ◽  
Nicholas H. Barton
Keyword(s):  
Natural Selection ◽  
Hybrid Zone

Chromosomal and allelic variation in Drosophila americana: selective maintenance of a chromosomal cline

Genome ◽  
2002 ◽  
Vol 45 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Bryant F McAllister
Keyword(s):  
Natural Selection ◽  
Hybrid Zone ◽  
Allelic Variation ◽  
Natural Populations ◽  
Chromosomal Evolution ◽  
Geographic Region ◽  
Hybrid Zones ◽  
Geographic Structure ◽  
Latitudinal Transect ◽  
Selective Maintenance

Geographically structured genetic variation, as represented by clines and hybrid zones, offers unique opportunities to study adaptation and speciation in natural populations. A hybrid zone has been reported between Drosophila americana americana and Drosophila americana texana, two taxa that are distinguished solely by the arrangement of their X and 4th chromosomes. In this study, samples of D. americana were collected along a latitudinal transect across the inferred hybrid zone, and the frequency of the alternative chromosomal arrangements is reported. These data illustrate that the alternative chromosomal arrangements are distributed along a shallow cline over a broad geographic region, and that the frequency of the arrangements is tightly correlated with latitude. Allelic variants at 13 RFLP loci in three genes on chromosome 4 exhibit no evidence of association with the cline. Presence of a cline for the chromosomal arrangements, as well as a general absence of geographic structure for variation at these genes, is interpreted as evidence that natural selection is responsible for the maintenance of this chromosomal cline. Furthermore, these results demonstrate that taxonomic subdivision of D. americana is unwarranted, because it exists as a cohesive species that is segregating a chromosomal fusion.Key words: chromosomal evolution, Robertsonian fusion, hybrid zone, cline, geographic variation, natural selection.

Assortative Mating and Natural Selection in an Iris Hybrid Zone

Evolution ◽  
1994 ◽  
Vol 48 (6) ◽  
pp. 1946 ◽  
Author(s):  
Mitchell B. Cruzan ◽  
Michael L. Arnold
Keyword(s):  
Natural Selection ◽  
Assortative Mating ◽  
Hybrid Zone

scholarly journals Body size differences do not arise from divergent mate preferences in a species pair of threespine stickleback

2009 ◽  
Vol 5 (4) ◽  
pp. 517-520 ◽  
Author(s):  
Megan L Head ◽  
Emily A. Price ◽  
Janette W. Boughman
Keyword(s):  
Sexual Selection ◽  
Body Size ◽  
Natural Selection ◽  
Gasterosteus Aculeatus ◽  
Sexual Isolation ◽  
Mate Preferences ◽  
Species Pair ◽  
Divergent Natural Selection ◽  
Relative Contribution ◽  
Threespine Sticklebacks

Ecological speciation can be driven by divergent natural and/or sexual selection. The relative contribution of these processes to species divergence, however, is unknown. Here, we investigate how sexual selection in the form of male and female mate preferences contributes to divergence of body size. This trait is known be under divergent natural selection and also contributes to sexual isolation in species pairs of threespine sticklebacks ( Gasterosteus aculeatus ). We show that neither female nor male size preferences contribute to body size divergence in this species pair, suggesting that size-based sexual isolation arises primarily through natural selection.

Spatially varying natural selection in a fish hybrid zone

2002 ◽  
Vol 61 (3) ◽  
pp. 696-711 ◽  
Author(s):  
L. Crespin ◽  
P. Berrebi ◽  
J‐D. Lebreton
Keyword(s):  
Natural Selection ◽  
Hybrid Zone ◽  
Spatially Varying
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