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- Title
Inheritance of quantitative resistance to downy mildew ( Plasmopara halstedii) in sunflower ( Helianthus annuus L.).
- Authors
Vear, F.; Serre, F.; Jouan-Dufournel, I.; Bert, P. F.; Roche, S.; Walser, P.; de Labrouhe, D. Tourvieille; Vincourt, P.
- Abstract
Quantitative resistance to sunflower downy mildew was studied on inbred lines and hybrids not carrying efficient major gene resistance, in field trials in one to four sites over 3 years. Hybrids from factorial crosses showed that inheritance is under additive control and comparison with reactions of parental inbred lines gave narrow sense heritabilities of 27–57%. Analysis of a polymorphic recombinant inbred line population without efficient major gene resistance indicated that two highly significant Quantitative Trait Loci (QTL) explained 42% of variation in field reaction to downy mildew. These QTL were mapped on linkage groups 8 and 10, and do not appear related to any of the known major resistance gene clusters. Possible bases of this type of resistance and its use in breeding are discussed.
- Subjects
DOWNY mildew diseases; COMMON sunflower; ASTERACEAE; SELECTION (Plant breeding); GENETIC polymorphisms
- Publication
Euphytica, 2008, Vol 164, Issue 1, p561
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-008-9759-5