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Screening for powdery mildew resistance in pea: complementation of field and growth chamber studies with histology, genomics and proteomics

AuthorsRubiales, Diego ; Fondevilla, Sara
KeywordsPowdery midew
Issue DateJun-2015
Citation1st General meeting COST FA1306 (2015)
AbstractPea powdery mildew, caused by the obligate biotrophic fungus Erysiphe pisi is an air-borne disease with a worldwide distribution, being particularly important in climates with warm dry days and cool nights. Only two resistance genes, named er1 and er2 were available so far. In arder to extend the availability of sources of resistance, a germplasm collection has been screened resulting in the identification of quantitative and qualitative resistance to E. pisi. In P. fulvum we have identified a new gene for resistance to E. pisi that we called Er3. This resistance gene has been successfully used in pea breeding, resulting in the release of a resistant pea cultivar ("Eritreo") containing this gene. We have identified SCAR markers linked to this gene that will facilitate the early selection of individuals carrying the gene in breeding programs. The mode of action at the cellular level of the three resistance genes has been characterized at the macroscopic and cellular level, and genes and proteins involved in the resistance have been identified. A majar concern in durability of available resistance is not only their stability against new races of E. pisi that might evolve but more worrying , their stability against Erysiphe species different from E. pisi, that might overcome these genes, as we recently found that E. trifolii was able to overcome er1 and Er3 genes. At present we are approaching deeper the study of the molecular and biochemical mechanisms of response to E. pisi in pea and looking also for resistance to E. trifolii, and developing the tools and knowledge needed for the introgression of the resistance into pea cultivars.
DescriptionTrabajo presentado en la 1st General meeting COST FA1306 (The quest for tolerant and stable varieties - Phenotyping at plant and cellular level), celebrada en Gatersleben (Alemania) del 22 al 24 de junio de 2015.
Appears in Collections:(IAS) Comunicaciones congresos
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