Objectif The aim is to collect and characterise the rhizobial genetic resources of the Caucasus and Baikal Lake regions of Russia and the Central Asian region of the former SU. These regions are known as gene centres of diversity of the plant family Fabaceae (Ivanov, 1988), but their rich rhizobium resources have not been systematically studied. Combining recent advances in molecular genetics of rhizobia with new knowledge on the biogeography of alfalfa and goat's rue, the project will shed light on the genetic diversity and phylogeny of environmentally important genes, such as rhizobial nod and nif genes, in relation to the mechanisms of co-evolution with their host plants. It will also produce genetic resources that can contribute to developing agriculture based on ecological principles, maintaining biodiversity and, in future, restoring marginal lands affected by drought, salinity, or damaged by pesticides.These aims will be fulfilled through the following specific objectives.1. To mount an expedition to the Caucasus to collect seeds and bacteria;2. To characterise the rhizobial collections by (A) phenotypic characterisation, (B) genotypic characterisation, (C) molecular taxonomy;3. To study nod-gene diversity in relation to host plant taxonomy;4. To look for host-range and stress-tolerance genes in the rhizobia;5. To find molecular markers for compatible plant-rhizobium combinations;6. To assess superior symbiotic combinations under stress conditions;7. To facilitate strain exchange and to improve the use of molecular methods in NIS laboratories by appropriate training.Scientific outputs from the proposed project will be:- collections of rhizobia from 3 different gene centres and of Medicago and Galega germplasm from the Caucasian centre of diversity;- information on the genetic structure of rhizobial populations in host plant gene centres;- data on variation in nod-gene regions and its relevance to genotype-specific nodulation;- data on symbiotic potential of different Medicago and Galega species;- new genes of rhizobia encoding genotype-specific interaction;- new genetic markers for Medicago truncatula lines. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Thème(s) 4 - Life Sciences INTAS - INTAS Appel à propositions Data not available Régime de financement Data not available Coordinateur University of York Contribution de l’UE Aucune donnée Adresse PoBox 373 YO1 5YW York Royaume-Uni Voir sur la carte Coût total Aucune donnée Participants (6) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire Institut National de la Recherche Agronomique France Contribution de l’UE Aucune donnée Adresse BP 27 31326 Castanet-Tolosan Cedex Voir sur la carte Coût total Aucune donnée N.I.Vavilov All-Russia Research Institute of Plant Genetic Resources Russie Contribution de l’UE Aucune donnée Adresse 42 Bolshaya Morskaya Street 190000 St. Petersburg Voir sur la carte Coût total Aucune donnée Russian Academy of Agricultural Sciences Russie Contribution de l’UE Aucune donnée Adresse 3 Podbelskogo shosse 189620 St. Petersburg Voir sur la carte Coût total Aucune donnée Tashkent State University Ouzbékistan Contribution de l’UE Aucune donnée Adresse Street VUZ - City 700005 Taschkent Voir sur la carte Coût total Aucune donnée Universitat Bielefeld Allemagne Contribution de l’UE Aucune donnée Adresse 25 Universitatstrasse 33501 Bielefeld Voir sur la carte Coût total Aucune donnée University of Helsinki Finlande Contribution de l’UE Aucune donnée Adresse 9 Vikinkaari 9 - 00014 Helsinki Voir sur la carte Coût total Aucune donnée
