1. Two stable QTL involved in adult plant resistance to powdery mildew in the winter wheat line RE714 are expressed at different times along the growing season
- Author
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B. Jaudeau, G. Doussinault, M.T. Pavoine, Helene Muranty, Dominique Barloy, W. Radek, Unité de recherche Amélioration, Génétique et Physiologie Forestières (AGPF), Institut National de la Recherche Agronomique (INRA), Amélioration des Plantes et Biotechnologies Végétales (APBV), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Unité expérimentale du GEVES du Magneraud, AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
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QTL mapping ,Adult ,0106 biological sciences ,Veterinary medicine ,bread wheat ,Population ,Triticum aestivum ,Blumeria graminis ,Growing season ,Plant Science ,seedling ,Biology ,Quantitative trait locus ,Plant disease resistance ,01 natural sciences ,03 medical and health sciences ,Genetics ,[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology ,Plant breeding ,Common wheat ,gene ,education ,Molecular Biology ,030304 developmental biology ,2. Zero hunger ,0303 health sciences ,education.field_of_study ,triticum-aestivum l ,major qtl ,food and beverages ,biology.organism_classification ,plant resistance ,linkage map ,stage ,[SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding ,Agronomy ,quantitative trait loci ,aegilops-tauschii coss ,Blumeria graminis f. sp tritici ,common wheat ,chromosomal location ,Agronomy and Crop Science ,Powdery mildew ,010606 plant biology & botany ,Biotechnology - Abstract
International audience; Powdery mildew (Blumeria graminis f. sp. tritici) is one of the major diseases of wheat (Triticum aestivum). Adult plant resistance (APR) to powdery mildew is considered more durable than resistance conferred by major race-specific resistance genes. The objective of the present study was a better understanding of the genetic basis of APR in RE714 by means of QTL analysis of several resistance scores along the growing season. A population of 160 recombinant inbred lines obtained from the cross between RE714 and Hardi (susceptible) was assessed for APR under natural infection conditions during 3 years and a genetic map with whole genome coverage was developed with microsatellite and AFLP markers in this population. Two major QTL on chromosomes 5D and 6A were detected each year, and 6 minor QTL were detected only in 1 or 2 years. The QTL on chromosome 5D was detected during all the growing season each year and its R 2 value varied between 8.5 and 56.3%, whereas the QTL on chromosome 6A was detected at 1–4 scoring dates in the 3 years, and its R 2 value varied between 6.1 and 20.5%. The two QTL explained between 24.4 and 52.1% of the phenotypic variance for AUDPC, depending on the year. The models including QTL and cofactors in the composite interval mapping explained between 29 and 72% of the variance. The molecular markers linked to the two major QTL could be used in marker-assisted selection for adult plant resistance to powdery mildew.
- Published
- 2009
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