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Genomic regions involved in productivity of two interspecific poplar families in Europe. 2. Biomass production and its relationships with tree architecture and phenology |
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| Authors: | Nicolas Marron Véronique Storme Sophie Y. Dillen Catherine Bastien Luca Ricciotti Francesco Salani Maurizio Sabatti Anne M. Rae Reinhart Ceulemans Wout Boerjan |
| Affiliation: | 1. Department of Biology, Campus Drie Eiken, Research Group of Plant and Vegetation Ecology, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium 7. Unité Mixte de Recherche 1137, INRA-Nancy Université, écologie et écophysiologie Forestières, 54280, Champenoux, France 2. Department of Plant Systems Biology, Flanders Institute for Biotechnology (VIB), Technologiepark 927, 9052, Ghent, Belgium 3. Department of Plant Biotechnology and Genetics, Ghent University, Technologiepark 927, 9052, Ghent, Belgium 4. Institut de la Recherche Agronomioque (INRA), Unité Amélioration, Génétique et Physiologie Forestières, Ardon, BP 20619, 45166, Olivet Cedex, France 5. Department of Forest Environment and Resources (DISAFRI), University of Tuscia, Via S. Camillo de Lellis, 01100, Viterbo, Italy 6. School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton, SO16 7PX, UK 8. Department of Biology, CNAP Artemisia Research, Project Centre for Novel Agricultural Products, (Area 7), PO Box?373, York, YO10 5YW, UK 9. VIB Department of Plant Systems Biology, Vakgroep Plantenbiotechnologie en Genetica, Universiteit Gent, Technologiepark 927, 9052, Ghent, Belgium |
| Abstract: | Short-rotation coppice of hybrid poplar is a promising renewable feedstock for biofuel production. Breeding for high biomass in short-rotation coppice has started only recently. Two hybrid poplar families were grown at two sites in Europe and phenotyped for a variety of biomass-related traits (1) to examine the extent of phenotypic and genetic variation in biomass production, ramification, resprouting, and phenology, (2) to search for genomic regions involved in productivity, and (3) to determine the effect of the environment on the expression of these traits. The performance of both families differed within and among sites. A pronounced heterosis was observed in most cases. Moderate to high heritability values were found. Seventeen quantitative trait loci (QTL) for biomass production, 13 for ramification, ten for resprouting, 21 for bud burst, and ten for bud set were identified. Genetic correlations and QTL colocation showed that high wood production was associated with high allocation of wood into branches and with high production of resprouts after coppicing. Correlations and QTL colocation between biomass production and phenology traits were weak. Our study provides valuable information on genomic regions involved in biomass production, ramification, and phenology and on phenotypic and genetic relationships among these three trait categories. |
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