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ARS Home » Pacific West Area » Pullman, Washington » Plant Germplasm Introduction and Testing Research » Research » Publications at this Location » Publication #347407
Title: Seventeen years of research on genetics of resistance to Aphanomyces root rot of pea

Author
item PILET-NAYEL, MARIE-LAURE - Institut National De La Recherche Agronomique (INRA)
item Coyne, Clarice - Clare
item LESNE, ANGELIQUE - Institut National De La Recherche Agronomique (INRA)
item HAMON, CELINE - Institut National De La Recherche Agronomique (INRA)
item LAVAUD, CLEMENT - Institut National De La Recherche Agronomique (INRA)
item DESGROUX, AURORE - Institut National De La Recherche Agronomique (INRA)
item BOUTET, GILES - Institut National De La Recherche Agronomique (INRA)
item MOUSSART, ANNE - Institut National De La Recherche Agronomique (INRA)
item McGee, Rebecca
item BARANGER, ALAIN - Institut National De La Recherche Agronomique (INRA)

Submitted to: North American Pulse Improvement Association
Publication Type: Abstract Only
Publication Acceptance Date: 10/10/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary: None.

Technical Abstract: Aphanomyces root rot, caused by the oomycete Aphanomyces euteiches, is a major soil borne disease of pea in many countries. Genetic resistance is considered to be a main way to control the disease. Since 2000, INRA has engaged a long-term research program to study genetic resistance to A. euteiches of pea, in close collaboration with USDA-ARS which set up the foundations of research work on genetics of the resistance. The main outputs of the works conducted for 17 years included (i) the identification of sources of partial resistance to A. euteiches (Pilet-Nayel et al., 2007; McGee et al, 2012); (ii) the detection of Quantitative Trait Loci (QTL) controlling partial resistance in multiple environments from several RIL populations (Pilet-Nayel et al., 2002, 2005; Hamon et al, 2011, 2013); (iii) the creation of Near Isogenic Lines (NILs) combining one to several QTL in different genetic backgrounds, by Back-cross Assisted selection (Lavaud et al., 2015), and the validation of QTL effects in the NILs (Lavaud et al, 2016); (v) the detection of short-size QTL intervals and favorable haplotypes associated with resistance by Genome-Wide-Association Mapping (GWAM) in a pea-Aphanomyces collection (Desgroux et al, 2016). Current work and prospects include (i) the identification of QTL-closely linked SNP markers, fine mapping of major QTL and validation of candidate genes (ii) the comparative genetic analysis of resistance to A. euteiches between major legumes and resistance to other stresses in pea, including Fusarium sp. (iii) the identification of QTL combinations and QTL pyramiding strategies (Pilet-Nayel et al., 2017) contributing to increase resistance efficiency and durability.