Susceptibility of autochthonous German Fraxinus excelsior clones to Hymenoscyphus pseudoalbidus is genetically determined | Zendy

Rasmus Enderle | Zendy; Aikaterini Nakou | Zendy; Kristina Thomas | Zendy; Berthold Metzler | Zendy

Open Access

Susceptibility of autochthonous German Fraxinus excelsior clones to Hymenoscyphus pseudoalbidus is genetically determined

Author(s) -

Rasmus Enderle,

Aikaterini Nakou,

Kristina Thomas,

Berthold Metzler

Publication year - 2014

Publication title -

annals of forest science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.763

H-Index - 77

eISSN - 1297-966X

pISSN - 1286-4560

DOI - 10.1007/s13595-014-0413-1

Subject(s) - fraxinus , biology , heritability , shoot , crown (dentistry) , resistance (ecology) , botany , horticulture , agronomy , medicine , dentistry , genetics

International audienceAbstractContextIt might be possible to establish a new generation of Fraxinus excelsior which is insusceptible towards ash dieback (agent: Hymenoscyphus pseudoalbidus) by efficient breeding. However, a considerable number of highly tolerant individuals which have the ability to pass on this trait to their progeny are needed.AimsThe aim of this study was to identify the potential of provenances from southwestern Germany as a source of future selection for resistance or resistance breeding.MethodsIn July 2012 and 2013, ash dieback severity was scored by assessing the crown defoliation and the portion of epicormic shoots in the crowns in clonal seed orchards with a total of 1,726 ash trees in southwestern Germany.ResultsAsh dieback severity differed strongly between the orchards and the clones. Broad-sense heritability ranged from 0.18 to 0.55 for crown defoliation and from 0.48 to 0.58 for the portion of epicormic shoots between the orchards. Clones from nearby populations did not show differences in general levels of susceptibility.ConclusionThe study highlights that there is high genetic variation in susceptibility and considerable genetic potential for resistance breeding in provenances from southwestern Germany

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