A revolução da poliploidia então... e agora: Stebbins revisitado - um fator importante na evolução das espécies?

quarta-feira, outubro 01, 2014

The polyploidy revolution then…and now: Stebbins revisited1

Douglas E. Soltis2–4⇑, Clayton J. Visger2,3 and Pamela S. Soltis3
- Author Affiliations

2Department of Biology, University of Florida, Gainesville, Florida 32611 USA
3Florida Museum of Natural History, University of Florida, Gainesville, Florida 32611 USA

Received for publication 15 April 2014.
Accepted for publication 30 June 2014.

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G. Ledyard Stebbins, Jr.


Polyploidy has long been considered a major force in plant evolution. G. Ledyard Stebbins, Jr., an architect of the Modern Synthesis, elegantly addressed a broad range of topics, from genes to chromosomes to deep phylogeny, but some of his most lasting insights came in the study of polyploidy. Here, we review the immense impact of his work on polyploidy over more than 60 years, from his entrance into this fledgling field in the 1920s until the end of his career. Stebbins and his contemporaries developed a model of polyploid evolution that persisted for nearly half a century. As new perspectives emerged in the 1980s and new genetic tools for addressing key aspects of polyploidy have become available, a new paradigm of polyploidy has replaced much of the Stebbinsian framework. We review that paradigm shift and emphasize those areas in which the ideas of Stebbins continue to propel the field forward, as well as those areas in which the field was held back; we also note new directions that plant geneticists and evolutionists are now exploring in polyploidy research. Perhaps the most important conclusion from recent and ongoing studies of polyploidy is that, following Levin and others, polyploidy may propel a population into a new adaptive sphere given the myriad changes that accompany genome doubling.

Key words:

autopolyploidy diversification epigenetics evolution genome doubling genomics
G. Ledyard Stebbins, Jr

↵1 The authors thank Betty Smocovitis for helpful comments on the manuscript. This project was supported in part by U. S. National Science Foundation Grant DEB-1146065 and DGE-1315138.

↵4 Author for correspondence (e-mail: dsoltis@ufl.edu)

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