The distribution of T-DNA in the genomes of transgenic Arabidopsis and rice

Barakat Abdelali, Gallois Patrick, Raynal Martine, Mestre-Ortega Dominique, Sallaud Christophe, Guiderdoni Emmanuel, Delseny Michel, Bernardi Giorgio. 2000. The distribution of T-DNA in the genomes of transgenic Arabidopsis and rice. FEBS Letters (471) : pp. 161-164.

Journal article ; Article de revue à facteur d'impact
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Abstract : Abstract Almost all the nuclear genes of four Gramineae (maize, wheat, barley, rice) and pea are located in DNA fractions covering only a 1-2% GC range and representing between 10 and 25% of the different genomes. These DNA fractions comprise large gene-rich regions (collectively called the 'gene space') separated by vast gene-empty, repeated sequences. In contrast, in Arabidopsis thaliana, genes are distributed in DNA fractions covering an 8% GC range and representing 85% of the genome. Here, we investigated the integration of a transferred DNA (T-DNA) in the genomes of Arabidopsis and rice and found different patterns of integration, which are correlated with the different gene distributions. While T-DNA integrates essentially everywhere in the Arabidopsis genome, integration was detected only in the gene space, namely in the gene-rich, transcriptionally active, regions of the rice genome. The implications of these results for the integration of foreign DNA are discussed. (Résumé d'auteur)

Mots-clés Agrovoc : Arabidopsis, Oryza sativa, Plante transgénique, Transfert de gène, Localisation de gène

Classification Agris : F30 - Plant genetics and breeding

Auteurs et affiliations

  • Barakat Abdelali, Université de Perpignan (FRA)
  • Gallois Patrick, Université de Perpignan (FRA)
  • Raynal Martine, Université de Perpignan (FRA)
  • Mestre-Ortega Dominique, Université de Perpignan (FRA)
  • Sallaud Christophe, CIRAD-AMIS-BIOTROP (FRA)
  • Guiderdoni Emmanuel, CIRAD-AMIS-BIOTROP (FRA)
  • Delseny Michel, Université de Perpignan (FRA)
  • Bernardi Giorgio, Stazione Zoologica Anton Dohrn (ITA)

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