2014/01/01 by François Balfourier, Balfourier, François
Agricultural and Biological Sciences · #Wheat and Barley Genetics and Pathology #Horticultural and Viticultural Research #Plant pathogens and resistance mechanisms
paper · doi:10.17180/kmjp-kx05
The bread wheat national collection, gathering 1783 French accessions, was evaluated during three years for ten agro-morphological traits in a multisite network of private breeders. Furthermore, the whole collection was genotyped for a set of 42 microsatellite loci. Field evaluation results show a wide diversity for all observed traits. ANOVA performed on heading date, plant height, spike density and lodging susceptibility indicates both high significant genotype and year effect, without interaction. The use of empiric selection index on disease traits (yellow and brown rusts, septoria, fusarium and powdery mildew) makes it possible to define different panels of accessions showing high level of resistance for each specific pathogen. Molecular analysis also reveals a large diversity at neutral level. From genotyping data, clustering analysis of the whole collection exhibits the importance of registration year effect on structure of the whole collection. A first approach of association genetics between markers and traits indicates a total of 130 significant associations (p<0.001). The national collection was declared as French contribution to the TIRPAA (international treaty on genetic resources for food and agriculture). Seeds from this collection are freely available in order to be used in breeding programs The whole passport and evaluation dataset of this collection is currently transferred on the national database SIReGaL and will be soon accessible on internet