Fundamental Research Division
The DRF at the CEA assemble approximately 6,000 scientists since January 2016.
Scientific result | Biodiversity | Agronomy | Genomics
An aquaculture species raised on all continents, the rainbow trout is
also a model organism for research, making it the most studied fish in the
world. Its genome, decrypted at the Genoscope, is the first to be published for
a representative of the family Salmonidae, which includes many species of great
agricultural and ecological interest. Apart from the advances that can be
expected regarding knowledge about trout and improved aquaculture
practices, this sequencing had a major surprise in store for all
About one hundred million years ago, the common ancestor of salmonids underwent
a complete genome duplication. Such events have occurred repeatedly
during the evolution of vertebrates (including within the lineage that
led to humans), although most events occurred at much older dates. With trout,
geneticists can see the consequences of a “recent” event for the first time, and
observe the mechanisms of genetic evolution at work. Here, the general structure
of the two copies of the original genome is still amazingly conserved, including
the genes, indicating a slow and progressive reorganization. This result
challenges the commonly accepted hypothesis in which the structure and content
of genes evolves very rapidly following a genome duplication.
rainbow trout genome provides novel insights into evolution after
whole-genome duplication in vertebrates, Nature Communications
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.