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Dernière mise à jour : Mai 2018

Menu Logo Principal Agrocampus Ouest Angers University   IRHS

IRHS

Project ANR REGULEG (2016-2021): Regulation of seed plasticity to the environment

Culture of different ecotypes of Medicago truncatula
... to produce varieties better adapted to climate change

Contect and objective of REGULEG

A major part of human food and animal feed supply is based on seeds, making the control of their quality essential for food security. An important advantage of cultivating legumes besides being protein-rich is their ability to fix atmospheric nitrogen, making them the lynch pin of sustainable agriculture. Major efforts are being made to reintroduce legumes as protein crops to improve the sustainability of European agricultural systems. However, despite huge efforts to boost grain legume production, their wide spread adoption in the European agriculture is strongly hampered by the instability of seed yield and quality due to altered environment such as drought and high temperature.

One way of breeding for stabilized seed quality and seed yield is to identify the genes that are responsible for their decrease upon environmental fluctuations in the field. As sessile organisms, plants are remarkable in their ability to sense, respond to, and survive a variety of abiotic stresses. This is largely the result of acclimation to the local environment in which they grow. These responses can be viewed as phenotypic plasticity: the ability of a single genotype to produce multiple phenotypes in response to the environment. In seeds, phenotypic plasticity and its implications in a climate change context remain largely understudied at the molecular level. 

The objective of this project is to identify key genes regulating the plasticity of compositional and physiological seed quality of Medicago truncatula using GxE genome wide association studies (GWAS). Using the close synteny of the M. truncatula genome with that of legume crops, we will transfer knowledge into pea to test for gene-to-field applicability. This project will highlight the mechanisms governing plasticity in legume seed quality traits that are related to adaptation to changing environments, thereby providing new cues towards the improvement of the grain legume sector.

Partners

  • UMR-IRHS Institut de Recherche en Horticulture et semences (Julia Buitink, équipe Conserto) : coordinateur du projet REGULEG.
  • UMR Agroécologie, Dijon (Christine Le Signor)
  • UMR Adaptation génétique et adaptation des plantes méditerranéennes et tropicales, Montpellier (Jean-Marie Prosperi)
  • UMR Institut des sciences des plantes Paris-Saclay, Gif-sur-Yvette (Abdelhafid Bendahmane).