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Trends Plant Sci. 2000 Jan;5(1):22-9.

Naturally occurring variation in Arabidopsis: an underexploited resource for plant genetics.

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  • 1Centro Nacional de Biotecnolog a, Departamento de GenĂ©tica Molecular de Plantas, Campus Universidad Autonoma, Cantoblanco, 28049-Madrid, Spain.


The definition of gene functions requires the phenotypic characterization of genetic variants. Currently, such functional analysis of Arabidopsis genes is based largely on laboratory-induced mutants that are selected in forward and reverse genetic studies. An alternative complementary source of genetic variation is available: the naturally occurring variation among accessions. The multigenic nature of most of this variation has limited its application until now. However, the use of genetic methods developed to map quantitative trait loci, in combination with the characteristics and resources available for molecular biology in Arabidopsis, allow this variation to be exploited up to the molecular level. Here, we describe the current tools available for the forward genetic analysis of this variation, and review the recent progress in the detection and mapping of loci and the cloning of large-effect genes.

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