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Conference papers

How can poplar breeding benefit from applied genomics ?

Abstract : Poplar breeding programs around the world have achieved substantial increases in growth and yield potential through careful combination of intra/interspecific hybridization and clonal selection. Major challenges of future poplar breeding include continuous genetic gains for recognized economic traits while addressing new breeding goals and optimization of largescale deployment of the selected genetic variation to limit economical and environmental risks associated to clonal forestry. To meet these demands for both adaptive and productivity traits, poplar breeding programs require more optimal short and long term management of genetic diversity gathered in breeding populations and deployed according to different cultivation schemes. Potential benefits and present limits of gene mapping technologies, gene expression studies, expanded genome sequences and modern bioinformatics and statistical tools will be analysed in the light of specific situation of poplar genetics and breeding. The following main challenges will be highlighted: (1) the increase of selection accuracy for complex breeding goals (2) the construction of elite genotypes with durable pests and disease resistances (3) the improvement of inter-specific hybridization: gene complementation; specific combining ability and marker-based distance, management of non-additive effects (4) the integration of phenotypic plasticity as breeding objective (5) the development of a merit which integrates target and non targeted genetic diversity (6) the more combined management of alleles and genotypes in long term breeding populations (7) the adjustments of selection intensity, phenotyping and genotyping costs and multistage marker-assisted selection. (8) the perspectives of genomic selection in an highly heterozygous species Even if considerable progress has been made to unravel the genetic make-up of important adaptive and economical traits in poplar, joint efforts from researchers in genomics and poplar breeders are needed for a successful implementation of all ‘ics’ technologies in practical breeding. In the next future, the true challenge for manipulating the complex nature of selection goals in poplar will depend on our ability to accurately phenotype trees in well chosen environments and to connect these phenotypic performances with the overwhelming amount of DNA base information thanks to efficient and user-friendly tools.
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Submitted on : Wednesday, June 3, 2020 - 11:36:24 PM
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  • HAL Id : hal-02756957, version 1
  • PRODINRA : 43786



Catherine Bastien. How can poplar breeding benefit from applied genomics ?. 5. International Poplar Symposium;IPS V, Sep 2010, Orvieto, Italy. ⟨hal-02756957⟩



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