Abstract
Ash dieback epidemic in Europe: How can molecular technologies help?
Highlights
Identification of genetic markers for low susceptibility using associative transcriptomics in ash Studies with a historical set of grafted clones of different lines of F. excelsior demonstrated that a few trees had low disease susceptibility over a wide range of environmental conditions, demonstrating a genetic basis for low susceptibility [25]
Genome sequencing and use of DNA-based markers have given clear insights into the likely source of H. fraxineus and its high incidence of spore spread compared with H. albidus in heavily infected regions
From the molecular genomics of ash trees, associative transcriptomics based on RNA sequencing is a rapid new way forward in terms of identifying genetic markers that could be used to screen for trees with low disease susceptibility
Summary
The life cycle of H. fraxineus appears similar to that of the related [14] native European fungus H. albidus, which grows on but does not show pathogenic symptoms on F. excelsior. Microsatellite markers [19], sequencing of parasitic mycoviruses [20], and genome sequencing [21] have been used to understand the population structure and genetic diversity of the invading H. fraxineus using isolates of the pathogen from Europe and Japan.
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