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Quantitative genetics of Norway spruce in Sweden

Chen, Zhi-qiang (2016). Quantitative genetics of Norway spruce in Sweden. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2016:55
ISBN 978-91-576-8612-1
eISBN 978-91-576-8613-8
[Doctoral thesis]

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Genetic improvement of solid wood and pulp and paper products related wood quality traits are important to increase productivity and value of Norway spruce plantation in Sweden. To incorporate wood quality traits into Norway spruce tree breeding program, genetic parameters of solid wood and fibre traits were investigated in a large Norway spruce population. 524 half-sib families from two trials tested in southern Sweden were selected to characterise the genetic variation in wood density, microfibril angle (MFA), modulus of elasticity (MOE), radial fibre width (RFW), tangential fibre width (TFW), fibre wall thickness (FWT), fibre coarseness (FC), and fibre length (FL).

To rapidly measure stiffness (MOE) of standing trees and accurately measure FL from increment cores, a new non-destructive method for quantifying stiffness and a new algorithm for calculating FL were developed. A combination of Pilodyn and acoustic Hitman measurement was found to predict stiffness of standing tree accurately and the new algorithm using Expectation-Maximization could accurately estimate FL.

To improve the estimate of genetic parameters and understanding genotype by environment (G×E) interaction in Norway spruce, spatial analyses were applied to 145 progeny trials and factor-analytic method was applied to 20 half-sib progeny trials. Spatial analysis significantly improved heritability and accuracy of breeding value prediction. Frost damage may be a main driver for G×E interaction for tree height of Norway spruce in southern and central Sweden.

Wood quality traits showed higher heritability than growth traits. However, growth traits had highly unfavourable genetic correlations with solid wood quality traits (0.54-0.75) and weakly to moderately unfavourable genetic correlations with fibre property traits (0.11-0.49).

In conclusion, selection based on diameter alone would have considerable negative effects on wood quality traits, a negligible or small negative effect on FL, and only a moderate effect on FWT. A selection index combining diameter and stiffness, which would have minimal impact on FL, is recommended for spruce breeding. Adequate economic weights for growth and stiffness traits should be determined for Norway spruce breeding program to maximize economic gain for Norway spruce.

Authors/Creators:Chen, Zhi-qiang
Title:Quantitative genetics of Norway spruce in Sweden
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :May 2016
Depositing date:2 May 2016
Number of Pages:56
IChen, Z.-Q., Gil, M.R.G., Karlsson, B., Lundqvist, S.-O., Olsson, L. & Wu, H.X. (2014). Inheritance of growth and solid wood quality traits in a large Norway spruce population tested at two locations in southern Sweden. Tree Genetics & Genomes, 10(5), pp. 1291-1303.
IIChen, Z.-Q., Karlsson, B., Lundqvist, S.-O., García Gil, M., Olsson, L. & Wu, H. (2015). Estimating solid wood properties using Pilodyn and acoustic velocity on standing trees of Norway spruce. Annals of Forest Science, ss. 1-10.
IIIChen, Z.-Q., Karlsson, B., Mörling, T., Olsson, L., Mellerowicz, E.J., Wu, H.X., Lundqvist, S.-O. & Gil, M.R.G. Genetic analysis of fiber dimensions and their correlations with stem diameter and solid wood properties in Norway spruce (submitted).
IVChen, Z.-Q., Abramowicz, K., Raczkowski, R., Ganea, S., Wu Harry, X., Lundqvist, S.-O., Mörling, T., de Luna Sara, S., García Gil María, R. & Mellerowicz Ewa, J. (2016). Method for accurate fibre length determination from increment cores for large-scale population analyses in Norway spruce. Holzforschung.
VChen, Z.-Q, Helmersson, A., Westin, J., Karlsson, B. & Wu, H.X. Efficiency of using spatial analysis for Norway spruce field tests in Sweden (manuscript).
VIChen, Z.-Q., Karlsson, B. & Wu, H.X. Patterns of additive genotype by environment interaction in tree height of Norway spruce in southern and central Sweden (manuscript).
Place of Publication:Umeå
Publisher:Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8612-1
ISBN for electronic version:978-91-576-8613-8
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
F Plant production > F62 Plant physiology - Growth and development
K Forestry > K10 Forestry production
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Agrovoc terms:picea abies, wood, wood properties, quality, genetic parameters, genetic correlation, plant fibres, growth, wood density, selection index, models, statistical methods, sweden
Keywords:Norway spruce, Quantitative genetics, Spatial analysis, Factor analytic, Fiber length, Solid wood quality, Index selection
Permanent URL:
ID Code:13331
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
External funders:Bio4energy
Deposited By: Mr Zhiqiang Chen
Deposited On:02 May 2016 13:10
Metadata Last Modified:10 Sep 2020 13:41

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