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

BMC Genomics

Research Article

Daniel Verhaegen¹  Audrey Carouché¹  Sylvie Deweer¹  Franck Bedon¹  Philippe Vigneron²  Jean-Marc Gion³  Henri Baillères⁴  Nina Ognouabi⁵  Christophe Plomion⁶  Jean-Paul Charpentier⁷  Philippe Rozenberg⁷  Victor Carocha⁸  Jacqueline Grima-Pettenati⁹  Frédérique Pichavant^1,10 

[1] CIRAD, Department of Biological System, Research Unit "Genetic improvement and adaptation of mediterranean and tropical plants" TA A-108/C, Campus International de Baillarguet, 34398, Montpellier Cedex, France;CIRAD, Department of Biological System, Research Unit "Genetic improvement and adaptation of mediterranean and tropical plants" TA A-108/C, Campus International de Baillarguet, 34398, Montpellier Cedex, France;CRDPI, BP 1291, Pointe Noire, Congo;CIRAD, Department of Biological System, Research Unit "Genetic improvement and adaptation of mediterranean and tropical plants" TA A-108/C, Campus International de Baillarguet, 34398, Montpellier Cedex, France;INRA, UMR 1202 BIOGECO, 69 route d'Arcachon, 33612, Cestas Cedex, France;CIRAD, Department of Tropical Production system and Process Performance, Research Unit "Processing and promotion of Tropical Woods", B-40/16 - 34398, 73 rue J-F Breton - TA, Montpellier Cedex 5, France;CRDPI, BP 1291, Pointe Noire, Congo;INRA, UMR 1202 BIOGECO, 69 route d'Arcachon, 33612, Cestas Cedex, France;INRA, Unité d'Amélioration, Génétique et Physiologie Forestières, 45166, Olivet, France;RAIZ - Forestry & Paper Research Institute, Qta S. Francisco, Apartado 15, 3801-501, Eixo, Aveiro, Portugal;UMR UPS/CNRS 5546, Pôle de Biotechnologies Végétales, BP42617, 24 chemin de Borde Rouge, 31326, Auzeville Tolosane, Castanet Tolosan, France;USBB - Institut du Pin, 351 cours de la libération, 33405, TALENCE Cedex, France;

关键词: Wood properties;    QTL;    genetic mapping;    candidate genes;    Eucalyptus;   

DOI  :  10.1186/1471-2164-12-301

 received in 2011-02-10, accepted in 2011-06-08,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundEucalyptus 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.ResultsLinkage 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.ConclusionsGiven 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.

【 授权许可】

CC BY   
© Gion et al; licensee BioMed Central Ltd. 2011