French (Fr)English (United Kingdom)
 

Publication director :
Olivier Martin

Editorial manager :
Rozenn Le Guyader

Webmaster :
Thierry Balliau

No translation found

SémIDEEV à l’UMR

Génétique Quantitative et Évolution – Le Moulon

Ferme du Moulon – Salle de conférences

Vendredi  10  novembre  2017

12h00

Clément LAFON-PLACETTE
Swedish University of Agricultural Sciences - Uppsala BioCenter

invité par This e-mail address is being protected from spambots. You need JavaScript enabled to view it

“Interrelation between mating systems, hybridization barrier,

genomic imprinting and transposable elements”

 

Abstract

Hybrid seed lethality is a component of the speciation process and a major issue to plant breeding. A century-long history of research on this topic made clear that the endosperm, the nourishing tissue in the seed, is the tissue where hybrid seed lethality takes place.
In addition, the problems faced by the hybrid endosperm seems to originate from a dosage imbalance between parental genomes. In other words, the genomes of different species have different dosages, coined as endosperm balance numbers (EBN). Such EBN seems to be influenced by the mating system of a species (selfing vs outbreeding), and evidence suggests that genomic imprinting is the molecular mechanism underlying hybrid seed lethality.
Finally, genomic imprinting evolution is tightly linked to the evolution of transposable elements, which itself is influenced by mating systems.
In this talk, I will show our working hypothesis to explain how all these factors can be linked in Capsella species.