Comprehensive genetic dissection of wood properties in a widely-grown tropical tree: Eucalyptus

Gion , Jean-Marc
        INRA
        , Cestas .
         UMR 1202 Biodiversité, Gènes et Communautés; Carouché , Audrey
        . Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”; Deweer , Sylvie
        . Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”; Bedon , Franck
        . Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”; Pichavant , Frédérique
        INRA
        , Cestas .
         UMR 0927 Institut de Mécanique et d'Ingénierie de Bordeaux; Charpentier , Jean-Paul
        INRA
        , Ardon .
         UR 0588 Unité de recherche Amélioration, Génétique et Physiologie Forestières; Baillères , Henri
        . Department of Tropical Production system and Process Performance, Research 15 Unit “Processing and promotion of Tropical Woods”; Rozenberg , Philippe
        INRA
        , Ardon .
         UR 0588 Unité de recherche Amélioration, Génétique et Physiologie Forestières; Carocha , Victor
        . Forestry & Paper Research Institute; Ognouabi , Nina
        .; Verhaegen , Daniel
        . Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”; Grima-Pettenati , Jacqueline
        . UMR UPS/CNRS 5546, Pôle de Biotechnologies Végétales; Vigneron , Philippe
        . Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”; Plomion , Christophe
        INRA
        , Cestas .
         UMR 1202 Biodiversité, Gènes et Communautés

Comprehensive genetic dissection of wood properties in a widely-grown tropical tree: Eucalyptus

2011

Gion , Jean-Marc (INRA , Cestas (France). UMR 1202 Biodiversité, Gènes et Communautés) | Carouché , Audrey (Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier(France). Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”) | Deweer , Sylvie (Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier(France). Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”) | Bedon , Franck (Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier(France). Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”) | Pichavant , Frédérique (INRA , Cestas (France). UMR 0927 Institut de Mécanique et d'Ingénierie de Bordeaux) | Charpentier , Jean-Paul (INRA , Ardon (France). UR 0588 Unité de recherche Amélioration, Génétique et Physiologie Forestières) | Baillères , Henri (Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier(France). Department of Tropical Production system and Process Performance, Research 15 Unit “Processing and promotion of Tropical Woods”) | Rozenberg , Philippe (INRA , Ardon (France). UR 0588 Unité de recherche Amélioration, Génétique et Physiologie Forestières) | Carocha , Victor (Instituto de Investigação da Floresta e Papel, Aveiro, Eixo(Portugal). Forestry & Paper Research Institute) | Ognouabi , Nina (Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Pointe-Noire(Congo).) | Verhaegen , Daniel (Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier(France). Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”) | Grima-Pettenati , Jacqueline (Centre National de la Recherche Scientifique, Castanet-Tolosan(France). UMR UPS/CNRS 5546, Pôle de Biotechnologies Végétales) | Vigneron , Philippe (Centre de Coopération Internationale en Recherche Agronomique pour le DéveloppementCentre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, MontpellierPointe-Noire(France). Department of Biological System, Research Unit “Genetic Diversity and Breeding 10 of Forest Tree Species”) | Plomion , Christophe (INRA , Cestas (France). UMR 1202 Biodiversité, Gènes et Communautés)

Background: Eucalyptus is an important genus in industrial plantations throughout the world and is grown for use as timber, pulp, paper and charcoal. Several breeding programmes have been launched worldwide to concomitantly improve growth performance and wood properties (WPs). In this study, an interspecific cross between Eucalyptus urophylla and E. grandis was used to identify major genomic regions (Quantitative Trait Loci, QTL) controlling the variability of WPs. [br/]Results: Linkage maps were generated for both parent species. A total of 117 QTLs were detected for a series of wood and end-use related traits, including chemical, technological, physical, mechanical and anatomical properties. The QTLs were mainly clustered into five linkage groups. In terms of distribution of QTL effects, our result agrees with the typical L-shape reported in most QTL studies, i.e. most WP QTLs had limited effects and only a few (13) had major effects (phenotypic variance explained > 15%). The co-locations of QTLs for different WPs as well as QTLs and candidate genes are discussed in terms of phenotypic correlations between traits, and of the function of the candidate genes. The major wood property QTL harbours a gene encoding a Cinnamoyl CoA reductase (CCR), a structural enzyme of the monolignol-specific biosynthesis pathway.[br/]Conclusions: Given the number of traits analysed, this study provides a comprehensive understanding of the genetic architecture of wood properties in this Eucalyptus full-sib pedigree. At the dawn of Eucalyptus genome sequence, it will provide a framework to identify the nature of genes underlying these important quantitative traits.

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