Identification of a second linkage group carrying genes controlling resistance to downy mildew (Plasmopara halstedii) in sunflower (Helianthus annuus L.)

@article{Bert2001IdentificationOA,
  title={Identification of a second linkage group carrying genes controlling resistance to downy mildew (Plasmopara halstedii) in sunflower (Helianthus annuus L.)},
  author={P. F. Bert and Denis Tourvieille de Labrouhe and Jacqueline Philippon and Said Mouzeyar and Isabelle Jouan and Paul Nicolas and F{\'e}licity Vear},
  journal={Theoretical and Applied Genetics},
  year={2001},
  volume={103},
  pages={992-997}
}
A sunflower line, XRQ, carrying the gene Pl5, which gives resistance to all French downy mildew races shows cotyledon-limited sporulation in seedling immersion tests; consequently, segregations in crosses with other downy mildew resistance sources were tested both by this method and by a secondary infection on leaves. Pl5 was found to segregate independently of Pl7 (HA338) but to be closely linked, or allelic, with Pl8 (RHA340). F3 and F4 progenies from a cross with a line containing Pl2 showed… CONTINUE READING
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