Diseases
Powdery mildew of flax
Linum usitatissimum L.
A fungal disease of flax caused by the obligate biotroph Oidium lini (teleomorph Podosphaera lini). It manifests as a white coating on leaves and stems, leading to premature tissue necrosis and the formation of shriveled seeds.
In the reference 7 varieties crop Common flax, where this is mentioned in the description.
The disease begins with the appearance of small patches of white powdery mildew, which rapidly spreads across the entire surface of the plant, eventually taking on a grayish-brown hue. In the structure of the mildew, the fungus produces its fruiting bodies — cleistothecia. Severe infection causes yellowing and shedding of leaves, stunted growth, flower bud necrosis, and a significant reduction in the quality of seeds within the capsules.
In genetic breeding for pathogen resistance, the dominant PM1 gene, discovered in a number of introduced varieties, is highlighted. Furthermore, modern research is focused on the identification of quantitative trait loci (QTL) located on chromosomes 1, 2, 4, 13, and 14, which provide plants with additive resistance to the disease.
General information about the subject — on the page Powdery mildew.
Varieties of Common flax mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
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