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Article

The Impact of Drought Stress on the Height Growth of Young Norway Spruce Full-Sib and Half-Sib Clonal Trials in Sweden and Finland

1
Skogforsk, Uppsala Science Park, 75183 Uppsala, Sweden
2
Natural Resources Institute Finland (Luke), Latokartanonkaari 9, 00790 Helsinki, Finland
3
Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Science, SE-90183 Umeå, Sweden
4
Natural Resources Institute Finland (Luke), Paavo Havaksentie 3, 90570 Oulu, Finland
5
Skogforsk, Ekebo 2250, 26890 Svalöv, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Gancho Slavov
Forests 2021, 12(4), 498; https://doi.org/10.3390/f12040498
Received: 22 March 2021 / Revised: 12 April 2021 / Accepted: 14 April 2021 / Published: 16 April 2021
(This article belongs to the Section Genetics and Molecular Biology)
The summer drought of 2018 was one of the most climatically severe events in Europe that led to record-breaking temperatures and wildfires in many parts of Europe. The main objective of this study was to assess the impact of the 2018 drought on the phenotypic and genetic response of Norway spruce height growth using the Standardized Precipitation-Evapotranspiration Index (SPEI). To achieve this, the total cumulative height growth of about 6000 clones from 2016 to 2019 in four full-sib trials in Sweden, aged 6–7 years, and from 2017 to 2019 in two half-sib trials in Finland, aged 8–9 years, were measured. The results indicate that the 2018 drought caused reductions in the increment of trees. Although heritability estimates were similar to other reports for Norway spruce, the additive genetic variance was highly inflated in one of the visibly drought-damaged trials in Southern Sweden. Similarly, the genotype by environment (G × E) interaction was highly significant in the drought-damaged Southern Swedish trials. Both additive genetic and phenotypic correlations obtained between height increments in 2019 and final heights were the weakest in all studied trials, implying that the drought legacies might have influenced the recovery of trees in 2019. We may conclude that the severe drought can be an underlying factor for a strong G × E interaction and changes in the ranking of genotypes. Therefore, a selection of drought-resistant genotypes with a good growth capacity tested in variables sites should be considered as an important criterion for future breeding of Norway spruce. View Full-Text
Keywords: drought; Norway spruce; Picea abies; genotype by environment interaction; genetic parameters drought; Norway spruce; Picea abies; genotype by environment interaction; genetic parameters
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MDPI and ACS Style

Hayatgheibi, H.; Haapanen, M.; Lundströmer, J.; Berlin, M.; Kärkkäinen, K.; Helmersson, A. The Impact of Drought Stress on the Height Growth of Young Norway Spruce Full-Sib and Half-Sib Clonal Trials in Sweden and Finland. Forests 2021, 12, 498. https://doi.org/10.3390/f12040498

AMA Style

Hayatgheibi H, Haapanen M, Lundströmer J, Berlin M, Kärkkäinen K, Helmersson A. The Impact of Drought Stress on the Height Growth of Young Norway Spruce Full-Sib and Half-Sib Clonal Trials in Sweden and Finland. Forests. 2021; 12(4):498. https://doi.org/10.3390/f12040498

Chicago/Turabian Style

Hayatgheibi, Haleh, Matti Haapanen, Jenny Lundströmer, Mats Berlin, Katri Kärkkäinen, and Andreas Helmersson. 2021. "The Impact of Drought Stress on the Height Growth of Young Norway Spruce Full-Sib and Half-Sib Clonal Trials in Sweden and Finland" Forests 12, no. 4: 498. https://doi.org/10.3390/f12040498

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