Publications des agents du Cirad


ARCHIPELAGO: Towards bridging the gap between molecular and genetic information in rice blast disease resistance

Ballini E., Vergne E., Tharreau D., Nottéghem J.L., Morel J.B.. 2009. In : Wang Guo-Liang (ed.), Valent Barbara (ed.). Advances in genetics, genomics and control of rice blast disease. New York : Springer [Etats-Unis], p. 417-425.

Large amounts of major resistance genes, QTL (Quantitative Trait Locus) and expression data dealing with rice blast resistance have been described in the past. We extensively reviewed this information and inserted it into the OryGenesDB database, creating the ARCHIPELAGO resource. This represents more than 1,500 genes differentially expressed upon infection by Magnaporthe oryzae, 1,000 resistance gene analogs, 88 mapped resistance genes, 341 QTLs and 165 metaQTLs. Further analysis of the metaQTL data allowed the identification of robust or broad spectrum metaQTLs. Cross referencing defense gene expression and metaQTL information identified some candidate genes for metaQTL but does not demonstrate preferential co-localization of defense-related genes in metaQTLs. In contrast, disease regulators are statistically associated with disease QTLs. At the genomic level, we can observe that some regions of the rice genome are richer than others for defense-related genes. This resource opens new possibilities for marker-assisted selection and QTL cloning.

Mots-clés : oryza; magnaporthe; magnaporthe oryzae

Thématique : Maladies des plantes; Génétique et amélioration des plantes

Chapitre d'ouvrage

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