Evolution Through Genetic Exchange
By (author) Michael L. Arnold
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Evolution Through Genetic Exchange by Michael L. Arnold
Book DescriptionEven before the publication of Darwin's Origin of Species, the perception of evolutionary change has been a tree-like pattern of diversification - with divergent branches spreading further and further from the trunk. In the only illustration of Darwin's treatise, branches large and small never reconnect. However, it is now evident that this view does not adequately encompass the richness of evolutionary pattern and process. Instead, the evolution of species from microbes to mammals builds like a web that crosses and re-crosses through genetic exchange, even as it grows outward from a point of origin. Some of the avenues for genetic exchange, for example introgression through sexual recombination versus lateral gene transfer mediated by transposable elements, are based on definably different molecular mechanisms. However, even such widely different genetic processes may result in similar effects on adaptations (either new or transferred), genome evolution, population genetics, and the evolutionary/ecological trajectory of organisms. For example, the evolution of novel adaptations (resulting from lateral gene transfer) leading to the flea-borne, deadly, causative agent of plague from a rarely-fatal, orally-transmitted, bacterial species is quite similar to the adaptations accrued from natural hybridization between annual sunflower species resulting in the formation of several new species. Thus, more and more data indicate that evolution has resulted in lineages consisting of mosaics of genes derived from different ancestors. It is therefore becoming increasingly clear that the tree is an inadequate metaphor of evolutionary change. In this book, Arnold promotes the 'web-of-life' metaphor as a more appropriate representation of evolutionary change in all lifeforms.
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Book DetailsISBN: 9780199229031
(245mm x 188mm x 14mm)
Imprint: Oxford University Press
Publisher: Oxford University Press
Publish Date: 11-Oct-2007
Country of Publication: United Kingdom
Books By Author Michael L. Arnold
Divergence with Genetic Exchange, Hardback (November 2015)
This book is an investigation into processes associated with evolutionary divergence and diversification, focussing on the role played by the exchange of genes between divergent lineages.
Reticulate Evolution and Humans, Hardback (October 2008)
This book describes the important role that the transfer of genes between organisms has played during the origin and evolution of humans, and the evolution of organisms on which the human species depends for shelter, sustenance and companionship.
Evolution Through Genetic Exchange, Hardback (July 2006)
It is becoming clear that the tree is an inadequate metaphor of evolutionary change. This book promotes the 'web-of-life' metaphor as an appropriate representation of evolutionary change in all lifeforms. It is suitable for senior undergraduate and graduate level students taking related courses in departments of genetics, ecology and evolution.
Natural Hybridization and Evolution, Paperback (January 1997)» View all books by Michael L. Arnold
This study includes data from sources which support the paradigm of natural hybridization as an important evolutionary process. It presents evidence of a significant role for natural hybridization in furthering adaptive evolution and evolutionary diversification in both plants and animals.
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Author Biography - Michael L. Arnold
Michael Arnold is an evolutionary biologist with over 90 scientific articles to his credit. He is best known for the work produced by his group on the evolutionary role of natural hybridization - particularly relating to the plant group known as the Louisiana Irises. However, he has collaborated on evolutionary biology research projects involving organisms as diverse as bats, Columbines, fruit flies and fungi. He has published one other book, entitled Natural Hybridization and Evolution (Oxford University Press, 1997). Mike is also a published outdoor writer whose stories and photographs have appeared in such places as Safari Magazine. Mike and his wife Frances have two adult children, Brian and Jenny.
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