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Early testing of adaptedness to temperature and water availability in Pinus sylvestris and Picea abies

Sonesson, Johan (2000). Early testing of adaptedness to temperature and water availability in Pinus sylvestris and Picea abies. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230
ISBN 91-576-5897-8
[Doctoral thesis]

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Abstract

Long-term climate changes have been evident in the past. In the future an increase in the rate of climate change is predicted owing to man-made emissions. Studies of adaptedness to different climatic conditions are of great importance for the design of appropriate breeding and gene conservation programmes. This thesis presents studies of adaptedness to temperature and water availability in Pinus sylvestris and Picea abies and explores the possibilities of utilising differences in adaptedness to obtain juvenile-mature (J-M) correlations strong enough for efficient early testing.
Offspring from clones in two Swedish Pinus sylvestris seed orchards and one Picea abies seed orchard were grown in growth chambers for one and two growth periods respectively. Two temperature regimes and two irrigation regimes were applied in a factorial design.
Both species expressed high phenotypic plasticity and additive variance for height growth and biomass traits. This implies that these populations should be able to adapt both to short-term and to long-term climate changes. Genotype by environment (GxE) interaction indicated strong differences in adaptedness to temperature and lower differences in adaptedness to water availability. Parent rank changes between treatments indicated that climate change could seriously alter the ranking of clones in breeding populations and thus decrease the genetic gain obtained in previous selections. Differences in stability among parents suggested that culling of unstable genotypes could be a way to reduce the negative effects of GxE interaction.
Genetic correlations between growth chamber and 14-30 year old field progeny trials with the same parents were mainly weak for both species. The correlations were improved by the drought treatment in the Picea abies experiment suggesting that further development of early testing methods for this species should include treatments with limiting water availability.

Authors/Creators:Sonesson, Johan
Title:Early testing of adaptedness to temperature and water availability in Pinus sylvestris and Picea abies
Year of publishing :2000
Number:163
Number of Pages:30
Publisher:Swedish University of Agricultural Sciences
ISBN for printed version:91-576-5897-8
ISSN:1401-6230
Language:English
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:climate change, drought, early growth, GxE interaction, juvenile-mature correlation, Norway spruce, Scots pine
URN:NBN:urn:nbn:se:slu:epsilon-p-107966
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107966
ID Code:17690
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Genetics (until 2002)
Deposited By: SLUpub Connector
Deposited On:05 Oct 2020 12:25
Metadata Last Modified:16 Oct 2020 06:44

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