A5069459724- Forest ecology and management
- Forest Insect Ecology and Management
- Tree Root and Stability Studies
- Forest Management and Policy
- Genetic and phenotypic traits in livestock
- Wood Treatment and Properties
- Turfgrass Adaptation and Management
- Forest Ecology and Biodiversity Studies
- Seedling growth and survival studies
- Horticultural and Viticultural Research
- Genetic diversity and population structure
- Berry genetics and cultivation research
- Plant Water Relations and Carbon Dynamics
- Plant Pathogens and Fungal Diseases
- Plant pathogens and resistance mechanisms
- Bioenergy crop production and management
- Ecology and Vegetation Dynamics Studies
- Plant Reproductive Biology
- Genetics and Plant Breeding
Forestry Research Institute of Sweden
2007-2022
Linnaeus University
2019-2022
Non-native forest tree species have been introduced in Europe since the 16th century, but only second half of 20th century significance seed source origin for their economic use was recognized, resulting establishment numerous provenance trials at a national, regional, European and International level, as those led by IUFRO. Breeding programs also launched continent most economically important species. Aim this work is formulation recommendations planting five non-native (Douglas fir, grand...
Potential improvement of lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) solid-wood properties was examined by estimating age trends inheritance, age–age genetic correlations, and the efficiency early selection using 823 increment cores sampled from 207 half-sib families at two independent progeny trials, aged 34–35 years, located in northern Sweden. High-resolution radial variation annual ring width, wood density, microfibril angle (MFA), modulus elasticity (clearwood...
Abstract Europe has a history rich in examples of successful and problematic introductions trees with native origin outside (non-native trees, NNT). Many international legal frameworks such as treaties conventions also the European Union have responded to global concern about potential negative impacts NNT that may become invasive natural ecosystems. It is, however, national regional legislation particular affects current future management decisions forest sector shapes landscapes Europe. We...
In boreal forests, autumn frost tolerance in seedlings is a critical fitness component because it determines survival rates during regeneration. To understand the forces that drive local adaptation this trait, we conducted freezing tests common garden setting for 54 Pinus sylvestris (Scots pine) populations (>5000 seedlings) collected across Scandinavia into western Russia, and genotyped 24 of these (>900 at >10 000 SNPs. Variation cold hardiness among populations, as measured by QST , was...
Genetic differences are described between improved and unimproved Scots pine (Pinus sylvestris L.) in 36 northern Swedish field tests, covering wide geographical climatic gradients (latitude 62.3°–67.8°N). Improved trees were represented by progenies from controlled crosses of first-generation, phenotypically selected plus trees, whereas originated unselected natural stands. superior terms height (9.2%), stem diameter (5.4%), volume (18.9%) at the age 27.4 years. The growth ages 10.5 years...
Genetic parameters were estimated for the diameter–height (d-h) relationship and three other tree stem-form characteristics (total height, breast height diameter, total volume) data from 10 diallel progeny trials of Scots pine ( Pinus sylvestris L.), at about 30 years age in Sweden. Linear mixed models fit to data, where adjustments intertree competition microsite heterogeneity made by means covariates a nearest-neighbour analysis. The d-h was analyzed with covariate (tree height) adjusted...
Genetic parameters, performance of provenances, and genotype by environment interaction (G × E) for diameter at breast height (DBH), survival, modulus elasticity time-of-flight (MOEtof) (an indirect measure stiffness), were investigated in six lodgepole pine progeny trials, aged 33–36 years, within three breeding zones northern Sweden. Provenances Yukon origin had the highest growth but lowest stiffness higher latitude, while those British Columbia (BC) grew faster lower latitudes zone 5....
Abstract Possibilities for early selection of clones future seed cone production were studied in a clonal orchard Scots pine (Pinus sylvestris L.) northern Sweden over the first 30 years following establishment. The annual data modelled as series bivariate analyses. correlations between any individual year and that previous year, cumulative all studied. corresponding multivariate analysis full fit simultaneously was best estimated with genetic distance-based power model (AR). (variation...
Abstract Female fertility is the basis for output of seeds from clonal orchards and its variation major interest economics biology seed orchards, especially efficiency diversity orchard crops. Assessments female in 10 mature (>15 years old) Scots pine (Pinus sylvestris L.) were evaluated compared. Depending on individual orchard, each clone was assessed slightly different ways, e.g. number strobili, cones, or litre cones per ramet. five made over consecutive years. The main result that mean...
Eight clones from a 16-year-old field trial of clonal cuttings lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) were analyzed for growth, growth pattern, and stem damage in the field. In addition, wood fiber traits (acoustic velocity [AcVel] spiral grain) density, microfibril angle, modulus elasticity, radial diameter (FibDR) determined SilviScan analyzes. Two with considerably more bent, broken, leaning stems differed other terms angle elasticity (MOE) outermost annual...
Quantitative genetic variation of fiber-dimension traits and their relationship with diameter at breast height (DBH) solid-wood (i.e., density modulus elasticity (MOE)) was investigated in lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.). A total 823 increment cores were sampled from 207 half-sib families two independent progeny trials, aged 34–35 years, located northern Sweden. High-resolution pith-to-bark profiles obtained for radial fiber width (RFW), tangential...
Mixing tree species could be a silviculture model that allows early harvest of short-rotation trees, while longer-rotation crop trees remain in the stand. We examined effects on growth and characteristics planted experiment with lodgepole pine (LP) elite-bred Scots (SP) mixed (50/50) monospecific plots three different spacings (at 28 years age after planting). The future development under thinning regimes, including net present value for one rotation, was analyzed using Heureka simulation...
Douglas fir is expected to play an increasingly important role in Swedish forestry under a changing climate. Thus far, seed orchards with clones of phenotypically selected trees (plus trees) have been established supply the market highly qualitative reproductive material. Given high genetic variation species, its growth properties are significantly affected by provenance. Here, we applied microsatellite markers identify origin within breeding programme. Moreover, analysed timing bud burst...
Competition is a concern for tree breeding because of its potential to reduce the genetic gain. Competition, if not accounted in analytical model, can potentially introduce source bias parameter estimation and value prediction. This study modelled competition between trees 20 Swedish progeny trials Norway spruce (Picea abies (L.) Karst.), Scots pine (Pinus sylvestris L.), lodgepole contorta Douglas ex Loudon). The model assumed has direct additive effect, which affects tree’s own phenotype,...
Abstract In 2001 large areas of Pinus sylvestris L. stands in Sweden were attacked by Gremmeniella abietina (Lagerb.) Morelet. The resultant damage was assessed five genetic field trials and one clonal seed orchard, with the aims quantifying variation tree responses to G. abietina, studying relationship between susceptibility growth traits, examining implications results for P. breeding. A comparison plus-tree progenies stand check-lots each four classes (dominant, co-dominant, subordinated...