Jeudi 9 mai 2019 à 14h00 – Salle 106 (Cœur d’Ecole)

The genomic basis for phenotypic evolution of environmental adaptation in maize

Randy Wisser
(Université Delaware – Etats Unis)

Understanding the genomic basis of environmental adaptation is central to mining exotic haplotypes for the development of next-generation crop cultivars. Using a novel, integrated study design allowing for simultaneous inference on population and quantitative genetic aspects of phenotypic evolution, we investigated a maize landrace of tropical origin that was phenologically adapted to a temperate environment over the course of ten generations. Our results show that a finite polygenic, multi-haplotypic architecture with transient shifts in haplotype frequencies underlie a 26-day mean decrease in female-flowering time across generations. We are now beginning to examine genomic features that could predict unanticipated shifts in the genomic response to selection and aim to integrate this into a new genomic selection approach for rapidly adapting maize populations to new environments.

Contact : florent.pantin@supagro.fr

Contacts IBIP :
Sabine Zimmermann (sabine.zimmermann@cnrs.fr)
Alexandre Martiniere (alexandre.martiniere@cnrs.fr)
Florent Pantin (florent.pantin@supagro.fr)
Chantal Baracco (chantal.baracco@inra.fr)