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Molecular analysis of a major locus for resistance to downy mildew in sunflower with specific PCR-based markers

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Abstract 

Resistance of sunflower to the obligate parasite Plasmopara halstedii is conferred by specific dominant genes, denoted Pl. The Pl6 locus confers resistance to all races of P. halstedii except one, and must contain at least 11 tightly linked genes each giving resistance to different downy mildew races. Specific primers were designed and used to amplify 13 markers covering a genetic distance of about 3 cM centred on the Pl6 locus. Cloning and sequence analysis of these 13 markers indicate that Pl6 contains conserved genes belonging to the TIR-NBS-LRR class of plant resistance genes.

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Authors and Affiliations

  1. UMR 1095 INRA-UBP ”Amélioration et santé des plantes”, Université Blaise Pascal. 24, Avenue des Landais 63177 Aubière Cedex, France e-mail: Said.MOUZEYAR@ovgv.univ-bpclermont.fr Fax: (+33)-4-73-40-79-14, , , , , , FR

    M. F. Bouzidi, S. Badaoui, F. Cambon, P. Nicolas & S. Mouzeyar

  2. INRA 234, avenue du Brézet 63039 Clermont Ferrand Cedex 02, France, , , , , , FR

    F. Vear & D. T. de Labrouhe

Authors
  1. M. F. Bouzidi
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  2. S. Badaoui
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  3. F. Cambon
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  4. F. Vear
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  5. D. T. de Labrouhe
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  6. P. Nicolas
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  7. S. Mouzeyar
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Additional information

Received: 9 April 2001 / Accepted: 10 August 2001

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Bouzidi, M., Badaoui, S., Cambon, F. et al. Molecular analysis of a major locus for resistance to downy mildew in sunflower with specific PCR-based markers. Theor Appl Genet 104, 592–600 (2002). https://doi.org/10.1007/s00122-001-0790-3

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  • DOI: https://doi.org/10.1007/s00122-001-0790-3

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