NDLI: Populus: arabidopsis for forestry. Do we need a model tree?

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Populus: arabidopsis for forestry. Do we need a model tree?

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Populus: arabidopsis for forestry. Do we need a model tree?

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Taylor, Gail
Description	Country affiliation: United kingdom Author Affiliation: Taylor G ( School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton SO16 7PX, UK. g.taylor@soton.ac.uk)
Abstract	Trees are used to produce a variety of wood-based products including timber, pulp and paper. More recently, their use as a source of renewable energy has also been highlighted, as has their value for carbon mitigation within the Kyoto Protocol. Relative to food crops, the domestication of trees has only just begun; the long generation time and complex nature of juvenile and mature growth forms are contributory factors. To accelerate domestication, and to understand further some of the unique processes that occur in woody plants such as dormancy and secondary wood formation, a 'model' tree is needed. Here it is argued that Populus is rapidly becoming accepted as the 'model' woody plant and that such a 'model' tree is necessary to complement the genetic resource being developed in arabidopsis. The genus Populus (poplars, cottonwoods and aspens) contains approx. 30 species of woody plant, all found in the Northern hemisphere and exhibiting some of the fastest growth rates observed in temperate trees. Populus is fulfilling the 'model' role for a number of reasons. First, and most important, is the very recent commitment to sequence the Populus genome, a project initiated in February 2002. This will be the first woody plant to be sequenced. Other reasons include the relatively small genome size (450-550 Mbp) of Populus, the large number of molecular genetic maps and the ease of genetic transformation. Populus may also be propagated vegetatively, making mapping populations immortal and facilitating the production of large amounts of clonal material for experimentation. Hybridization occurs routinely and, in these respects, Populus has many similarities to arabidopsis. However, Populus also differs from arabidopsis in many respects, including being dioecious, which makes selfing and back-cross manipulations impossible. The long time-to-flower is also a limitation, whilst physiological and biochemical experiments are more readily conducted in Populus compared with the small-statured arabidopsis. Recent advances in the development of large expressed sequence tagged collections, microarray analysis and the free distribution of mapping pedigrees for quantitative trait loci analysis secure Populus as the ideal subject for further exploitation by a wide range of scientists including breeders, physiologists, biochemists and molecular biologists. In addition, and in contrast to other model plants, the genus Populus also has genuine commercial value as a tree for timber, plywood, pulp and paper.
File Format	HTM / HTML
ISSN	03057364
e-ISSN	10958290
Journal	Annals of Botany
Issue Number	6
Volume Number	90
Language	English
Publisher	Oxford University Press
Publisher Date	2002-12-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Research Support, Non-u.s. Gov't Comparative Study Discipline Botany Oligonucleotide Array Sequence Analysis Arabidopsis Chromosome Mapping Genome, Plant Genetic Complementation Test Chemistry Genetics Physiology Populus Quantitative Trait Loci
Content Type	Text
Resource Type	Article
Subject	Plant Science

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