• Publications
  • Influence
The genetic legacy of the Quaternary ice ages
TLDR
The present genetic structure of populations, species and communities has been mainly formed by Quaternary ice ages, and genetic, fossil and physical data combined can greatly help understanding of how organisms were so affected. Expand
Some genetic consequences of ice ages, and their role in divergence and speciation
The genetic effects of pleistocene ice ages are approached by deduction from paleoenvironmental information, by induction from the genetic structure of populations and species, and by theirExpand
Genetic consequences of climatic oscillations in the Quaternary.
  • G. Hewitt
  • Biology, Medicine
  • Philosophical transactions of the Royal Society…
  • 29 February 2004
TLDR
DNA evidence indicates temperate species in Europe had different patterns of postglacial colonization across the same area and different ones in previous oscillations, whereas the northwest region of North America was colonized from the north, east and south. Expand
Analysis of Hybrid Zones
TLDR
Hybrid zones are narrow regions in which genetically distinct populations meet, mate, and produce hybrids, and models of parapatric speciation, and of Wright's "shifting balance," involve the formation, move­ ment, and modification of hybrid zones. Expand
Post-glacial re-colonization of European biota
TLDR
Diversity from southern to northern Europe in the extent of allelic variation and species subdivision is seen; this is attributed to rapid expansion northward and the varied topography of southern refugia allowing populations to diverge through several ice ages. Expand
Mitochondrial pseudogenes: evolution's misplaced witnesses.
TLDR
Methods for avoiding Numts have now been tested, and several recent studies demonstrate the potential utility of Numt DNA sequences in evolutionary studies. Expand
Speciation, hybrid zones and phylogeography — or seeing genes in space and time
  • G. Hewitt
  • Biology, Medicine
  • Molecular ecology
  • 1 March 2001
TLDR
The origins and development of the study of speciation, hybrid zones and phylogeography are outlined using evolutionary iconography, and a ‘tree of trees’ summarizes this growth and current vitality. Expand
Hybridization and speciation
TLDR
A perspective on the context and evolutionary significance of hybridization during speciation is offered, highlighting issues of current interest and debate and suggesting that the Dobzhansky–Muller model of hybrid incompatibilities requires a broader interpretation. Expand
The structure of biodiversity – insights from molecular phylogeography
  • G. Hewitt
  • Biology, Medicine
  • Frontiers in Zoology
  • 26 October 2004
TLDR
The genetic diversity is differently patterned within and among regions and biomes, and is related to their histories of climatic changes, and this has major implications for conservation science. Expand
Nuclear integrations: challenges for mitochondrial DNA markers.
TLDR
A better understanding of how the nuclear sequences themselves are interesting, and capable of serving as valuable molecular tools, they can also confound phylogenetic and population genetic studies. Expand
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