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Thesis defense

On Thursday 11 July 2019 at Lusignan, Wagdi Ghaleb will defend his thesis untitled: Analysis of the genetic diversity of the germinative response to temperature of populations of Lolium perenne L., Festuca arundincea Schreb and Dactylis glomerata L.

Envoi de graines pour des tests de germination à différentes températures dans six lieux différents, dans le cadre du projet Casdar Regate en partenariat avec l'ACVF et le Geves.. © INRA, Armelle Pérennès
Updated on 07/02/2019
Published on 07/02/2019

Wagdi Ghaleb will defend his thesis directed by Abraham Escobar Gutiérrez at URP3F.
Thesis comitee: Rossitza Atanassova (Professor, University of Poitiers), Marie-Pascale Prud’homme (Professor, University of Caen-Basse Normandie), Béatrice Teulat (Teacher, Agrocampus Ouest), Florence Volaire (Researcher, INRA) et Abraham J. Escobar-Gutiérrez (Research director, INRA).


Seed germination plays a fundamental role in determining the ecological behaviour and geographical distribution of plants. Changes in environmental conditions, such as increases in temperature and atmospheric CO2 and decreases in precipitation, can affect the historical distribution of grass production in temperate regions. It is necessary to understand the germinative response to temperature of perennial prairie grasses of temperate zones, in order to develop strategies for successful establishment of natural and sewing populating. The main objective of this work is to analyze the genetic diversity of the germinative response to temperature in populations of three species of perennial prairie grasses: English ryegrass (Lolium perenne L.), tall fescue (Festuca arundinacea Schreb.), cocksfoot grasses (Dactylis glomerata L.). The different types of responses to temperature that have been distinguished in this study, reflect the genetic variability existing within each species. This genetic variability concerns also the time of beginning of germination, the maximum germination speed and the time required to reach 95% of the final germination. This difference in germination capacity as a function of temperature could be of genetic or non-genetic origin.