0 avis
Towards genotypes adapted to climate change via combination of phenotyping and modelling: The projects DROPS and Phenome
Archive ouverte
Edité par CCSD -
National audience. The period of time from now to 2050 is required for designing varieties able to cope with climate changes. Phenotyping is the main limiting step, now that genotyping has become an almost routine activity. A strategy with four pillars is used in the projects UE-DROPS and IA-Phenome-FPPN, involving public and private sectors. (1) Investigating the genetic variability of plant traits as a response to well-defined environmental conditions. Phenotyping platforms, developed in Phenome, allow the identification of genomic regions associated with traits of interest and the estimation of parameters of crop models for 100s genotypes. DROPS has identified QTLs, usable in breeding, for sensitivity of growth to water stress, for root architecture and for water use efficiency. (2) Investigating the performance and yield of hundreds of genotypes under high C02, high temperatures or low rainfall in equipped fields, via detailed imaging using sensors carried by ground vectors developed in Phenome. (3) Testing a large number of genotypes in a wide range of conditions. DROPS analyses yield components in a network of 30 field situations over Europe for 250 genotypes. This allows investigating the genetic variability of the sensitivities of genotypes to high temperatures and drought in the field. (4) Modelling, for testing combinations of alleles in a variety of climatic scenarios and management practices. Climatic conditions sensed by plants have been analyzed in 50 European nodes over 50 years, and in predicted European climates for 2050. Clustering individual scenarios reveals that 4 scenarios capture most of the variability of current climates, but also of predicted climates in 2050. Hence, it is possible to analyze today the performances of genotypes in future climates involving drought and high temperature, by using the current climatic variability between sites and years. We are currently simulating the interests of promising combinations of alleles in different European scenarios.
Consulter en ligne
Suggestions
Du même auteur
