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- Title
Susceptibility of some Flax Lines to Powdery Mildew and Effect of The Disease on Agronomic and Technological Traits.
- Authors
Habeb, Marian M.; Mahmoud, Doaa I.; Abd El-Sadek, Maysa S.
- Abstract
A two-year field study was conducted at El-Giza Agricultural Research Station to (1) estimate heritability of powdery mildew (PM) resistance when disease incidence (DI) or disease severity (DS) was used as criterion for evaluating resistance, (2) assess PM resistance of ten flax genotypes (lines), (3) determine relationship between each of DI and DS ratings and agronomic or technological traits. Genotypes component of variance of DI and DS were highly significant each year indicating that extensive genetic variation for DI and DS were present within the tested genotypes. Heritability and genetic advance of DS were greater in both years than those of DI demonstrating that considerable progress in breeding for PM resistance could be expected in current breeding programs when DS is used as criterion for evaluating resistance. Genotype 3 was a promising genotype for commercialization for the following reasons: firstly, it was the least susceptible genotype. Secondly, it showed environmently stable performance. Thirdly, it showed superiority in some traits compared to some of the tested genotypes. No significant correlations were observed between disease intensity variables ( DI and DS) and agronomic or technological traits.
- Subjects
POWDERY mildew diseases; GENETIC variation; FLAX; DISEASE incidence; HERITABILITY
- Publication
Journal of Plant Protection & Pathology, 2021, Vol 12, Issue 7, p473
- ISSN
2090-3677
- Publication type
Article
- DOI
10.21608/jppp.2021.188647