TAILIEUCHUNG - Báo cáo khoa học: "Localisation of genomic regions controlling microdensitometric parameters of wood characteristics in hybrid larches"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Localisation of genomic regions controlling microdensitometric parameters of wood characteristics in hybrid larches. | Ann. For. Sci. 59 2002 607-615 INRA EDP Sciences 2002 DOI forest 2002046 607 Original article Localisation of genomic regions controlling microdensitometric parameters of wood characteristics in hybrid larches Anne Arcadea b Patricia Faivre-Rampanta c Luc E. Pâquesa and Daniel Prata d aUnité Amelioration Génétique et Physiologie Forestières INRA - Centre d Orleans BP 20619 Ardon 45166 Olivet Cedex France b Station de Génétique Végétale INRA Ferme du Moulon 91190 Gif-sur-Yvette France cUniversité Henri Poincaré - Nancy I UMR 1136 Interactions Arbres Micro-Organismes BP 239 54506 Vandreuvre-les-Nancy Cedex France d Université Claude Bernard - Lyon 1 UMR 5558 Biométrie et Biologie Evolutive Bât G. Mendel 69622 Villeurbanne Cedex France Received 5 July 2001 accepted 1 March 2002 Abstract - The use of wood quality components in forest trees selection is hampered by long delays before phenotypic evaluation. Marker-assisted selection opens new possibilities since selection becomes feasible even before trait expression. In the present study we have analysed 224 13-year-old hybrid larches derived from eight progenies from a single female parent in order to localise genomic regions controlling several wood traits. Traits were assessed on radial cores by microdensitometry a method that provides estimates of wood density and radial growth and avoids tree destruction. Measurements were assessed individually on six consecutive rings. QTL detection was achieved by ANOVA using 68 AFLP markers distributed on average each 20 cM along larch genome. Significant QTLs for at least two out of six studied years are distributed on seven linkage groups. Applications towards marker-assisted selection are discussed. QTL wood quality microdensitometry wood density Larix Résumé - Localisation des regions du génome contrôlant des composantes microdensitométriques de la qualité du bois chez des melezes hybrides. Les paramètres de qualité du bois sont peu pris en compte dans Tamélioration

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