Results 241 to 250 of about 63,195 (262)
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Speciation without gene‐flow in hybridizing deer
Molecular Ecology, 2022Abstract Under the ecological speciation model, divergent selection acts on ecological differences between populations, gradually creating barriers to gene flow and ultimately leading to reproductive isolation. Hybridisation is part of this continuum and can both promote and inhibit the speciation process.
Camille Kessler +2 more
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A framework for comparing processes of speciation in the presence of gene flow
Molecular Ecology, 2011AbstractHow common is speciation‐with‐gene‐flow? How much does gene flow impact on speciation? To answer questions like these requires understanding of the common obstacles to evolving reproductive isolation in the face of gene flow and the factors that favour this crucial step.
Roger K Butlin, Carole M Smadja
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Speciation with gene flow and the genetics of habitat transitions
Molecular Ecology, 2012AbstractWhether speciation can advance to completion in the face of initially high levels of gene flow is a very controversial topic in evolutionary biology. Extensive gene exchange is generally considered to homogenize populations and counteract divergence.
Melania E Cristescu +2 more
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Speciation, gene flow, and seasonal migration in Catharus thrushes (Aves:Turdidae)
Molecular Phylogenetics and Evolution, 2019 New World thrushes in the genus Catharus are small, insectivorous or omnivorous birds that have been used to explore several important questions in avian evolution, including the evolution of seasonal migration and plumage variation. Within Catharus, members of a clade of obligate long-distance migrants (C. fuscescens, C. minimus, and C.
Kathryn M Everson +2 more
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Mechanisms of Assortative Mating in Speciation with Gene Flow: Connecting Theory and Empirical Research [PDF]
American Naturalist, 2018 The large body of theory on speciation with gene flow has brought to light fundamental differences in the effects of two types of mating rules on speciation: preference/trait rules, in which divergence in both (female) preferences and (male) mating traits is necessary for assortment, and matching rules, in which individuals mate with like individuals ...
Michael Kopp +2 more
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Gene flow, genomic homogenization and the timeline to speciation in Amazonian manakins
Molecular Ecology, 2022AbstractPhylogeographical studies of the most species‐rich region of the planet—the Amazon basin—have repeatedly uncovered genetically distinctive, allopatric lineages within currently named species, but understanding whether such lineages are reproductively isolated species is challenging.
Alfredo O. Barrera‐Guzmán +4 more
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Speciation Has a Spatial Scale That Depends on Levels of Gene Flow
American Naturalist, 2010(Uploaded by Plazi for the Bat Literature Project) Area is generally assumed to affect speciation rates, but work on the spatial context of speciation has focused mostly on patterns of range overlap between emerging species rather than on questions of geographical scale.
Yael Kisel, Timothy G Barraclough
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DYNAMICS OF DRIFT, GENE FLOW, AND SELECTION DURING SPECIATION INSILENE
Evolution; International Journal of Organic Evolution, 2012 The mechanics of speciation with gene flow are still unclear. Disparity among genes in population differentiation (F(ST)) between diverging species is often interpreted as evidence for semipermeable species boundaries, with selection preventing "key" genes from introgressing despite ongoing gene flow.
Dmitry A Filatov
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Models of Selection, Isolation, and Gene Flow in Speciation
The Biological Bulletin, 2014Many marine ecologists aspire to use genetic data to understand how selection and demographic history shape the evolution of diverging populations as they become reproductively isolated species. I propose combining two types of genetic analysis focused on this key early stage of the speciation process to identify the selective agents directly ...
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Speciation with gene flow in a heterogeneous virtual world: can physical obstacles accelerate speciation? [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2012 The origin of species remains one of the most controversial and least understood topics in evolution. While it is being widely accepted that complete cessation of gene-flow between populations owing to long-lasting geographical barriers results in a steady, irreversible increase of divergence and eventually speciation, the extent to which various ...
Abbas Golestani +2 more
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