Functional genomics of wood formation in Eucalyptus [S22-65]

Grima Pettenati Jacqueline, Paux Etienne, Foucart Camille, Ladouce Nathalie, Sivadon Pierre, Marques Cristina, Carocha Victor, Borralho Nuno, Astorga Roberto, Toval Gabriel, Gion Jean-Marc, Vigneron Philippe. 2003. Functional genomics of wood formation in Eucalyptus [S22-65]. In : 7th International Congress of Plant Molecular Biology, ISPMB 2003, Barcelona (Spain), June 23-28. Book of abstracts. ISPMB. Barcelone : ISPMB Office, Résumé, p. 331. International Congress of Plant Molecular Biology. 7, Barcelone, Espagne, 23 June 2003/28 June 2003.

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Abstract : Considering the increase of world demand for wood, improving wood quality to better fit industrial requirements becomes a major objective. Hitherto, breeding for wood traits has been hampered by the cost of traditional assays and the need to wait until the trees are nearly mature to be evaluated. The recent development of molecular tools for genomic analyses of woody species makes it possible to identify genes controlling wood traits. The genus Eucalyptus includes the most widely used tree species for industrial plantation, therefore is one of the world's main source of biomass and the first hardwood tree used for pulp making. The objective of our project joining academic and industrial partners is to identify and map putative candidate genes (CG) and QTLs responsible for variations in wood properties, in order to implement Allele Aided Selection strategies in Eucalyptus breeding programs. With this aim in view, we have developed a functional genomics-based approach that does not require an a priori knowledge of the factors controlling these traits to search for pertinent "expressional" CG. Our hypothesis is that genes controlling wood properties would be specifically or at least preferentially expressed in differentiating xylem. To this end, Suppression Subtractive Hybridization (SSH) libraries have been constructed and cDNA clones have been spotted onto nylon membranes to make high density filters. The results of both sequence analysis and transcript profiling experiments, assist us in the selection of the most appropriate CG to be mapped on Eucalyptus genetic linkage maps, and allow us to gain a better understanding of the mechanisms involved in one of the most fascinating example of differentiation in plants, i.e. secondary xylem formation. (Texte intégral)

Mots-clés Agrovoc : Eucalyptus, Génie génétique, Lignification

Classification Agris : F62 - Plant physiology - Growth and development
F30 - Plant genetics and breeding

Auteurs et affiliations

  • Grima Pettenati Jacqueline, CNRS (FRA)
  • Paux Etienne, CNRS (FRA)
  • Foucart Camille, CNRS (FRA)
  • Ladouce Nathalie, CNRS (FRA)
  • Sivadon Pierre, CNRS (FRA)
  • Marques Cristina, Centro de Investigacao Florestal (PRT)
  • Carocha Victor, Centro de Investigacao Florestal (PRT)
  • Borralho Nuno, Centro de Investigacao Florestal (PRT)
  • Astorga Roberto, ENCE (ESP)
  • Toval Gabriel, ENCE (ESP)
  • Vigneron Philippe, CIRAD-FORET-PLANTATIONS (FRA)

Autres liens de la publication

Source : Cirad - Agritrop (

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