Jing xu

Jing xu
University of Copenhagen · Department of Geosciences and Natural Resource Management

PhD

About

10
Publications
1,688
Reads
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119
Citations
Additional affiliations
August 2020 - present
University of Copenhagen
Position
  • Professor (Assistant)
Description
  • My main area of research focus is combing modelcular genetics and quantitative genetics to do forest tree breeding. In addition, developing imagine analysis methods using machine learning for phenology meaurement of broad-leaved tree species.
June 2018 - May 2020
University of Copenhagen
Position
  • PostDoc Position
Description
  • Research focuses on ad-hoc breeding of small forest tree species and studies the gene and metabolite expression in Abies nordmanniana trees after infestation with silver fir wooly adelgids.
October 2014 - May 2018
University of Copenhagen
Position
  • PhD Student
Description
  • Thesis title: Genetics of susceptibility to Neonectria neomacrospora and Christmas tree traits in Abies sp.
Education
September 2011 - July 2014
Northwest A&F University
Field of study
  • Forest genetics and tree breeding
September 2007 - June 2011
Northwest A&F University
Field of study
  • Forestry

Publications

Publications (10)
Article
Full-text available
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...
Article
Full-text available
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...
Article
•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...
Article
Full-text available
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....
Article
Full-text available
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....
Article
Full-text available
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...
Article
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...
Article
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...
Article
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...
Article
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...

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