A5081897221- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Forest Ecology and Biodiversity Studies
- Botany and Plant Ecology Studies
- Seedling growth and survival studies
- Forest Management and Policy
- Plant Water Relations and Carbon Dynamics
- Forest Insect Ecology and Management
- Plant Molecular Biology Research
- Plant Reproductive Biology
- Tree-ring climate responses
- Genetic diversity and population structure
- Tree Root and Stability Studies
- Bioenergy crop production and management
- Plant Gene Expression Analysis
- Mycorrhizal Fungi and Plant Interactions
- Horticultural and Viticultural Research
- Wood Treatment and Properties
- Plant Physiology and Cultivation Studies
- Turfgrass Adaptation and Management
- Seed Germination and Physiology
- Plant Stress Responses and Tolerance
- Social and Educational Sciences
- Genetic and phenotypic traits in livestock
- Plant and animal studies
Norwegian Institute of Bioeconomy Research
2015-2025
Landscape Institute
2009-2012
Norwegian University of Life Sciences
2011
Forest Research Institute
1997-2005
The Research Council of Norway
1990
University of Wisconsin–Madison
1978
Norway spruce (Picea abies [L.] Karst.) is a broadly distributed European conifer tree whose history has been intensively studied by means of fossil records to infer the location full-glacial refugia and main routes postglacial colonization. Here we use recently compiled pollen data as template examine how past demographic events have influenced species' modern genetic diversity. Variation was assessed in mitochondrial nad1 gene containing two minisatellite regions. Among 369 populations...
The current distribution of forest genetic resources on Earth is the result a combination natural processes and human actions. Over time, tree populations have become adapted to their habitats including local ecological disturbances they face. As planet enters phase human-induced climate change unprecedented speed magnitude, however, previously locally-adapted are rendered less suitable for new conditions, 'natural' biotic abiotic taken outside historic distribution, frequency intensity...
Abstract Climate change threatens the role of European forests as a long-term carbon sink. Assisted migration aims to increase resilience forest tree populations climate change, using species-specific climatic limits and local adaptations through transferring seed provenances. We modelled assisted scenarios for seven main species analysed effects provenance selection, accounting environmental genetic variations, on annual above-ground sink regrowing juvenile forests. To resilience,...
ABSTRACT The temperature during maternal reproduction affects adaptive traits in progenies of Norway spruce ( Picea abies (L) Karst.). Seed production a cold environment advances bud set and acclimation the autumn dehardening flushing spring, whereas warm reproductive delays timing these traits. We repeated crosses between same parents produced seeds under contrasting temperatures. Elevated temperatures were applied at different time points from female meiosis to embryogenesis, followed by...
• Adaptive traits in Picea abies (Norway spruce) progenies are influenced by the maternal temperatures during seed production. Here, we have extended these studies testing effects of photoperiod and temperature on phenology frost hardiness progenies. Using eight phytotron rooms, seeds from three unrelated crosses were made an environmental 2 × factorial combination long short days high low temperatures. The then forced to cease growth rapidly at end first growing season. An interactive...
Abstract Conifers are evolutionarily more ancient than their angiosperm counterparts, and thus some adaptive mechanisms features influenced by epigenetic appear highly displayed in these woody gymnosperms. such as Norway spruce have very long generation times life spans, well large genome sizes. This seemingly excessive amount of genomic DNA without apparent duplications could be a rich source sites for regulation modifications. In spruce, an important mechanism has been identified, called...
Abstract This study presents information about the variability between and within populations of Norway spruce in lammas shoot formation. Assessments shoots were conducted two short-term trials involving full sib families from complete diallel crosses, each originating a natural population. These assessments made over growing seasons when trees six seven years seed, during which early summer temperatures varied significantly. The grown on former agricultural land with large variation soil...
We present results from early tests and field trials of offspring two Norway spruce ( Picea abies (L.) Karst.) seed orchards containing clones that have been transferred high altitudes to sea level northern southern latitudes. Seedlings seeds produced in the low-altitude orchard developed frost hardiness later at end growth season, flushed trials, grew taller than seedlings natural stands. They had lowest mortality rate frequency injuries trials. Similar were observed orchard. found no...
Taxus baccata L. is a dioecious gymnosperm with wide but scattered distribution in Europe. Small populations are inclined to genetic drift, and we therefore studied structure 13 T. of the northern range margin coastal areas Norway by means isoenzyme loci. The average observed (Ho) expected (He) heterozygosities were 0.143 0.150, respectively. differentiation was considerable (Fst = 0.166), derived gene flow correspondingly modest (Nm 1.26). fixation index (Fis) across all 0.039, consistently...
The root rot pathogens in Norway spruce (Picea abies) Heterobasidion ssp. cause substantial loss carbon sequestered forest and economic revenue for owners. To facilitate strategic breeding planning increased resistance against this pathogen particular, the blue stain fungus Endoconidiophora polonica, growth wood quality traits (wood density spiral grain), we estimated additive genetic parameters, correlations potential response from selection. Parameters were a progeny trial series...
Abstract Genetic variation and performance of up to 40-year-old Norway spruce ( Picea abies (L.) Karst.) families from half-diallel crosses made in natural populations where studied, the results were compared with nursery test seedlings (1-2 years seed) short-term farm-field tests at 6-10 seed. The diallel analyses revealed significant levels additive genetic variance for growth phenology traits. non-additive was generally small moderate. Strong correlations found between long-term trials...
In 1989, identical crosses (2-3 females within males) were performed with Picea abies (L.) Karst. in a greenhouse seed orchard at Biri nursery and an outdoor Huse, 32 km north of Biri. Pollination began 17 days earlier the than outdoors Huse. The potted grafts moved when cones no longer receptive. Twelve full-sib family pairs (Biri Huse) from these grown phytotron tested for height autumn frost hardiness during their first growing season. No significant difference was found between indoor...
Selections were made within East European Norway spruce provenances in a provenance trial northern Sweden and the selected clones grafted Norwegian seed orchard mixed with plus trees of local origin. Full-sib families generated by controlled crosses, producing sets both inter- intraprovenance families, which planted two short-term long-term trials. Measurements frost damage, tree height, annual shoot growth rhythm lammas shoots, genetic parameters estimated. The from origin showed least...