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Genotypic Stability and Genetic Parameters for Growth and Biomass Traits in a Water × Temperature Factorial Experiment with Pinus sylvestris L. Seedlings

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The objective of this experiment was to study genotypic stability for growth and biomass traits recorded in treatments with optimal and limiting water availability at two different temperatures and to study how the different growth environments affected genetic parameter estimates. Open-pollinated families of Scots pine (Pinus sylvestris L.) were collected in 2 seed orchards with 28 and 35 families respectively and cultivated for 1 growth period in a growth chamber. Heritability estimates were generally moderate–high (h 2 = 0.3–0.8) for growth traits in individual treatments. Joint analyses of all treatments revealed significant family × temperature and family × temperature × water regime interactions. Family × water regime interaction and family effects were not significant. The results indicate low adaptation to water availability and a higher adaptation to different temperatures in the two Swedish Pinus sylvestris populations. If we assume that our results hold for a large part of the rotation the G × E interactions imply that climate change can alter the ranking of clones in a breeding program and thus decrease genetic gain. Studies of family ecovalence values showed that a minority of families (4–31%) contributed significantly to the interactions. Selection for stability could be a possible way to reduce the negative effects of G × E interaction. FOR. SCI. 46(4):487–495.

Keywords: G × E interaction; Scots pine; climate change; drought; early growth

Document Type: Miscellaneous

Affiliations: 1: The Forestry Research Institute of Sweden (SkogForsk), Science Park, S-75183, Uppsala, Sweden, Phone: +4618188589; Fax:+4618188600 2: Swedish University of Agricultural Sciences, Department of Forest Genetics, Box 7027 S-75007, Uppsala, Sweden, Phone: +4618671240

Publication date: 2000-11-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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