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Your search keyword '"Serre, Frédéric"' showing total 2 results
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2 results on '"Serre, Frédéric"'

1. Comparative genetic analysis of quantitative traits in sunflower (Helianthus annuus L.)

Author

Bert, Pierre-François, Dechamp-Guillaume, Grégory, Serre, Frédéric, Jouan, I., Tourvieille de Labrouhe, Denis, Nicolas, P., Vear, Felicity, Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut National de la Recherche Agronomique - INRA (FRANCE), Université Blaise Pascal - UBP (FRANCE), Unité mixte de recherche amélioration et santé des plantes, Institut National de la Recherche Agronomique (INRA)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP), UMR INRA / INPT-ENSAT : Biologie Moléculaire et Physiologie de la Maturation des Fruits, Institut National de la Recherche Agronomique (INRA)-École nationale supérieure agronomique de Toulouse (ENSAT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)-Université de Toulouse (UT)

Subjects
(Helianthus annuus L, Quantitative trait loci (QTL), Phoma macdonaldi, food and beverages, Phytopathologie et phytopharmacie, [SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy
Abstract

International audience; One hundred and fifty F2–F3 families from a cross between two inbred sunflower lines FU and PAZ2 were used to map quantitative trait loci (QTL) for resistance to white rot (Sclerotinia sclerotiorum) attacks of terminal buds and capitula, and black stem (Phoma macdonaldii). A genetic linkage map of 18 linkage groups with 216 molecular markers spanning 1,937 cM was constructed. Disease resistances were measured in field experiments for S. sclerotiorum and under controlled conditions for P. macdonaldii. For resistance to S. sclerotiorum terminal bud attack, seven QTL were identified, each explaining less than 10% of phenotypic variance. For capitulum attack by this parasite, there were four QTL (each explaining up to 20% of variation) and for P. macdonaldii resistance, four QTL were identified, each having effects of up to 16%. The S. sclerotiorum capitulum resistance QTL were compared with those reported previously and it was concluded that resistance to this disease is governed by a considerable number of QTL, located on almost all the sunflower linkage groups.

Published
2004
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2. Consensus mapping of major resistance genes and independent QTL for quantitative resistance to sunflower downy mildew.

Author

Vincourt P, As-Sadi F, Bordat A, Langlade NB, Gouzy J, Pouilly N, Lippi Y, Serre F, Godiard L, Tourvieille de Labrouhe D, and Vear F

Subjects
Chromosomes, Plant genetics, DNA, Plant genetics, Genetic Markers, Genotype, Helianthus immunology, Linkage Disequilibrium, Plant Diseases immunology, Plant Diseases microbiology, Polymerase Chain Reaction, Polymorphism, Genetic genetics, Chromosome Mapping, Genes, Plant genetics, Helianthus genetics, Helianthus microbiology, Immunity, Innate genetics, Oomycetes pathogenicity, Plant Diseases genetics, Quantitative Trait Loci
Abstract

Major gene resistance to sunflower downy mildew (Plasmopara halstedii) races 304 and 314 was found to segregate independently from the resistance to races 334, 307 and 304 determined by the gene Pl2, already positioned on Linkage Group (LG) 8 of sunflower molecular maps. Using a consensus SSR-SNP map constructed from the INEDI RIL population and a new RIL population FU × PAZ2, the positions of Pl2 and Pl5 were confirmed and the new gene, denoted Pl21, was mapped on LG13, at 8 cM from Pl5. The two RIL populations were observed for their quantitative resistance to downy mildew in the field and both indicated the existence of a QTL on LG8 at 20-40 cM from the major resistance gene cluster. In addition, for the INEDI population, a strong QTL on LG10, reported previously, was confirmed and a third QTL was mapped on LG7. A growth chamber test methodology, significantly correlated with field results, also revealed the major QTL on LG10, explaining 65 % of variability. This QTL mapped in the same area as a gene involved in stomatal opening and root growth, which may be suggested as a possible candidate to explain the control of this character. These results indicate that it should be possible to combine major genes and other resistance mechanisms, a strategy that could help to improve durability of sunflower resistance to downy mildew.

Published
2012
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