Questions and concepts in plant virus evolution: a historical perspective

Garcia-Arenal Rodriguez, Fernando and Fraile Pérez, Aurora (2008). Questions and concepts in plant virus evolution: a historical perspective. In: "Plant Virus Evolution". Springer, Berlin, Alemania, pp. 1-14. ISBN 978-3-540-75762-7.

Description

Title: Questions and concepts in plant virus evolution: a historical perspective
Author/s:
  • Garcia-Arenal Rodriguez, Fernando
  • Fraile Pérez, Aurora
Item Type: Book Section
Title of Book: Plant Virus Evolution
Date: 2008
ISBN: 978-3-540-75762-7
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The interest in plant virus evolution can be dated to the late 1920s, when it was shown that plant virus populations were genetically heterogeneous, and that Ihcir composition changed according to the experimental conditions. Many important ideas were generated prior to the era of molecular virology, such as the role of hostand vector-associated selection in virus evolution, and also that small populations, gene coadaptation and evolutionary trade-offs could limit the efficiency of selection. The analysis of viral genomes in the 1980s and 1990s established the quasispecieslike structure of their populations and allowed extensive analyses of the relationships among vims strains and species. The concept that vims populations had huge sizes and high rates of adaptive mutations became prevalent in this period, with selection mostly invoked as explaining observed patterns of population structure and evolution. In recent times vims evolution has been coming into line with evolutionary biology, and a more complex scenario has emerged. Population bottlenecks during host colonization, during host-to-host transmission or during host population fluctuations may result in smaller population sizes, and genetic drift has been recognized as an important evolutionary factor. Also, particularities of viral genomes such as low levels of neutrality, multifunctionality of coding and encoded sequences or strong epistasis could constrain the plasticity of viral genomes and hinder their response to selection. Exploring the complexities of plant vims evolution will continue to be a challenge for the future, particularly as it affects host, vector and ecosystem dynamics.

More information

Item ID: 4767
DC Identifier: http://oa.upm.es/4767/
OAI Identifier: oai:oa.upm.es:4767
Official URL: http://www.springer.com/life+sciences/plant+sciences/book/978-3-540-75762-7
Deposited by: Memoria Investigacion
Deposited on: 02 Nov 2010 10:04
Last Modified: 20 Apr 2016 13:51
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