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Introduction
Skills and Expertise
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August 2020 - present
Education
September 2011 - July 2014
September 2007 - June 2011
Publications
Publications (10)
Single nucleotide polymorphism (SNP) markers are powerful tools for investigating population structures, linkage analysis, and genome-wide association studies, as well as for breeding and population management. The availability of SNP markers has been limited to the most commercially important timber species, primarily due to the cost of genome seq...
Somatic embryogenesis (SE) cloning techniques for Nordmann fir Christmas tree production have been pursued and refined in Denmark, and three SE clonal trials with 201 SE clones from seeds of 27 Nordmann fir trees and seedlings from bulk harvest seeds in Georgia, Caucasus, were established from 2014 to 2015. This study was the first to evaluate the...
•Key message:
Pronounced additive genetic variation and high narrow-sense heritability for lesion length caused by Neonectria neomacrospora were found in a Nordmann fir progeny test. Significant inbreeding depression was detected in traits important for Christmas tree production. Recurrent selection for multiple traits would be successful for Chris...
Pedigree reconstruction via DNA markers and subsequent quantitative genetic analyses in production stands of trees is an alternative to traditional forest tree breeding. The method requires variable DNA markers; preferably cost-efficient to genotype. We tested the approach in breeding for Christmas tree traits in a Danish landrace of Abies procera....
Christmas tree is an important specialty crop. In Europe, the main Christmas tree species is Nordmann fir (Abies nordmanniana (Steven) Spach) and nearly 42 million trees are sold each year. This paper focuses on three key traits for Christmas tree production: growth (including branching), commercial tree quality, and post-harvest needle retention....
Quasi-field trials (QFTs) using offspring from first-generation plus trees of Abies bornmülleriana were established on two sites in Denmark via DNA markers and parentage analysis. The aim of this study was to demonstrate an example of ad hoc breeding to make better genetic material available for Christmas tree production. Assessments of several imp...
In Europe, the most widely used Christmas tree species, Abies nordmanniana, has a long history of infestation with the adelgid Dreyfusia nordmannianae. Since 2011, the species has furthermore been increasingly damaged by the fungus Neonectria neomacrospora. The objective was to study whether infestations by N. neomacrospora were facilitated by the...
Abstract: Context: Nordmann fir, a widely used Christmas tree species in Europe, has, since 2011, been increasingly damaged by a canker disease caused by Neonectria neomacrospora.
Aims: The objective was to study the genetic variation and genotype by environment interaction in the susceptibility of Nordmann fir to N. neomacrospora.
Methods: Damage...
Ash dieback, caused by the fungus Hymenoscyphus fraxineus, has threatened ash trees in Europe for more than two decades. However, little is known of how endophytic communities affect the pathogen, and no effective disease management tools are available. While European ash (Fraxinus excelsior) is severely affected by the disease, other more distantl...
The fungus Neonectria neomacrospora has recently caused an epidemic outbreak in conifer species within the genus Abies in Denmark and Norway. Christmas tree producers in Europe and North America rely, to a large extent, on Abies species. The damage caused by N. neomacrospora, including dead shoot tips, red flagging of branches and potentially dead...