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Inheritance of resistance to Sclerotinia sclerotiorum (Lib.) de Bary in sunflower. I. Study of reactions to two mycelial tests






Agronomie 7(6): 421-429

Inheritance of resistance to Sclerotinia sclerotiorum (Lib.) de Bary in sunflower. I. Study of reactions to two mycelial tests

Results of 2 breeding tests, on stems and capitula, to estimate tissue resitance to spread of mycelium were compared with natural attacks on cotyledons, terminal buds and capitula, using parental inbred lines and F1 hybrids of a factorial cross of 6 male steriles and 6 restorers. Resistance was polygenic, different genes being involved for each organ. The capitulum test showed the best level of heritability. Additivity appeared more important than dominance interactions.


Accession: 001619287



Related references

Robert, N.; Vear, F.; Tourvieille-De-Labrouhe, D., 1987: Inheritance of resistance to sclerotinia sclerotiorum lib. de bary in sunflower i. results of two tests with mycelial inoculum. Two breeding tests were tried out on stems and capitula of sunflowers [Helianthus annuus] to estimate tissue resistance to spread of Sclerotinia sclerotiorum mycelium. These tests were compared with observations of natural attacks on cotyledons, t...

Robert, N.; Vear, F.; Labrouhe, D.T. de (Tourvieille de Labrouhe, D), 1987: Inheritance of resistance to Sclerotinia sclerotiorum (Lib.) de Bary in sunflower. I. Study of reactions to two tests using mycelium. Tests were carried out on 6 male-sterile lines (4 cytoplasmically, 3 genetically), 6 pollen parents and 35 F1 hybrids from crosses among them using inoculation of stems or inflorescences. The stem test was the more precise (CV = 14.2%) but the inf...

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