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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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Biodiversity and Polyploidy • BP Team

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Context and Issues

Genetic variability remains a limiting factor for breeding purposes in crop whereas a large variability is available among collections and related species. Its optimal use requires to collect accessions of different origins and to optimize crosses and recombination to limit the introduction of characters to the traits of interest.

Because of the development of new genetically modified crops, gene flow from the crops to its wild relatives has to be quantified under natural conditions to assess the risk of gene dispersal in natural populations. 



  • To maintain and describe genetic diversity of Brassica and Solanum species
  • To develop  core collections representative of the species diversity for genetic analyses and phenotypic characterization
  • To study the genomic structure of diploid and polyploid Brassica species
  • To elucidate the mechanisms involved in the stabilization of bread wheat -Triticum aestivum- and oilseed rape -Brassica napus
  • To define more precisely the factors which regulate recombination, both homologous (within the same genome) and homeologous (between related genomes)
  • To optimize the introduction of resistance genes from related species into the bread wheat and oilseed rape genomes
  • To assess gene flow from oilseed rape to its related weeds

Expertise & Skills


Genetics, cytogenetics, genomics, bio-informatics, micropropagation, cryopreservation.


Our Biological Genetic Resource Center (BRC BrACySol) is in charge of the description (phenotype and genotype), multiplication and distribution of genetic resources of agronomic species including Brassica and Solanum species.

The Molecular Cytogenetics Platform provides an infrastructure and abilities to support research projects concerning studies of genomes  of different plant species (Brassica, Wheat, Tomato, Cotton, Grapevine, Lolium, Lupinus…).

Team leader

Anne-Marie Chèvre, Senior Scientist

Phone: (+33) 2 23 48 51 31

Anne-Marie Chèvre, Biodiversity and Polyploidy team leader