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Heredity of Resistance to Botrytis cinerea in Sunflower ( Helianthus annuus ) Measured by Artificial Infections
Author(s) -
Ladsous O.,
Vear F.,
Labrouhe D. Tourvieille
Publication year - 1991
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1991.tb01211.x
Subject(s) - botrytis cinerea , biology , helianthus annuus , sunflower , hybrid , horticulture , genotype , resistance (ecology) , botany , agronomy , genetics , gene
This study was made to determine the reactions of sunflower genotypes to artificial infections of Botrytis cinerea under netting tunnels with irrigation. The genotypes were the parents and F 1 hybrids of a factorial cross between 5 female (male sterile) and 5 restorer lines. Their resistance levels were measured by the mean delay between infection and symptom appearance on the capitulum. Significant genotypic differences in reaction to B. cinerea were shown. The ratio of general combining ability to specific combining ability was 2.9, indicating that additive effects are important. However, there were some significant interactions between male and female parents. The mean parent‐hybrid and parent‐progeny regressions were both significant with correlation coefficients of r = 0.57 and r = 0.66 respectively. It is concluded that breeding programmes with tests for B. cinerea resistance in early generations should be effective in the development of sunflower hybrids with improved B. cinerea resistance.