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Improvement of Eucalyptus plantations grown for pulp production

Kien, Nguyen Duc (2009). Improvement of Eucalyptus plantations grown for pulp production. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2009:53
ISBN 978-91-576-7400-5
[Doctoral thesis]

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Abstract

The objective of the studies this thesis is based upon was to increase knowledge of the genetics of traits related to wood volume, wood density and pulp yield in Eucalyptus urophylla and E. camaldulensis that could be used to enhance and accelerate tree improvement programs in Vietnam. Two provenance-progeny trials of E. urophylla in northern Vietnam testing 144 families, and three clonal trials of E. camaldulensis in southern, north-central and northern Vietnam testing a total of 172 clones were examined in these studies. In E. urophylla, significant between-provenance differences in growth traits were observed, but not in wood basic density or cellulose content. Estimated within-provenance heritabilities were 0.10-0.30 for growth traits, 0.60 for density and 0.50 for cellulose content. Estimated coefficients of additive genetic variation were 10% for growth traits, 6% for density and 4% for cellulose content. Selection efficiency for growth traits was found to be maximal at an age of 2-3 years, with an anticipated rotation period of 5-10 years. Genetic correlations between growth traits and density (0.10-0.28), growth traits and cellulose content (0.28-0.45), and cellulose content and density (-0.02) did not differ significantly from zero. Genetic correlations between the two sites in northern Vietnam, which were 60 km apart and had similar climate and soils, were high for both growth traits and wood density. In E. camaldulensis, clonal repeatabilities at ages 3 and 5 years were 0.18-0.42 for growth traits and 0.71-0.78 for density. The coefficient of genotypic variation was about 13% for growth traits and 6% for density. Genotypic correlations between growth traits and density (-0.16-0.24) did not differ significantly from zero. Between-site genotypic correlations were in the ranges of 0.32-0.56 for growth traits and 0.72-0.88 for density. Selection gains for diameter at breast height at each site at a selection proportion of 5% were 22-32%, with minor effects on density. Selection for diameter based on rankings of material at one site would yield gains in diameter at the other two sites that were only 40-60% of the gains obtainable from direct selection at those sites. Results from the studies suggest that considerable genetic improvement in eucalypt plantations grown for pulp production in Vietnam can be achieved through breeding and appropriate deployment. Strategies for management of genotype by environment interactions in breeding and clonal deployment of these species are discussed.

Authors/Creators:Kien, Nguyen Duc
Title:Improvement of Eucalyptus plantations grown for pulp production
Year of publishing :2009
Volume:2009:53
Number of Pages:44
Papers/manuscripts:
NumberReferences
ALLI. Kien, N.D., Jansson, G., Harwood, C. & Thinh, H.H. (2009). Genetic control of growth and form in Eucalyptus urophylla in northern Vietnam. Journal of Tropical Forest Science 21(1), 50-65 II. Kien, N.D., Jansson, G., Harwood, C., Almqvist, C. & Thinh, H.H. (2008). Genetic variation in wood basic density and pilodyn penetration and their relationship with growth, stem straightness, and branch size for Eucalyptus urophylla in northern Vietnam. New Zealand Journal of Forestry Science 38(1), 160-175. III. Quang, T.H., Kien, N.D., von Arnold, S., Jansson, G., Thinh, H.H. & Clapham, D. (2009). Relationship of wood composition to growth traits of selected open-pollinated families of Eucalyptus urophylla from a progeny trial in Vietnam. Submitted. IV. Kien, N.D., Quang, T.H., Jansson, G., Harwood, C., Clapham, D. & von Arnold, S. (2009). Cellulose content as a selection trait in breeding for kraft pulp yield in Eucalyptus urophylla. Accepted for publication in Annals of Forest Science. V. Kien, N.D., Jansson, G., Harwood, C. & Almqvist, C. (2009). Clonal variation and genotype by environment interactions in growth and wood density in Eucalyptus camaldulensis at three contrasting sites in Vietnam. Submitted
Place of Publication:Uppsala
ISBN for printed version:978-91-576-7400-5
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:eucalyptus camaldulensis, eucalyptus urophylla, cellulose, pulp, wood, density, growth, clones, genetic correlation, genotype environment interaction, heritability, provenance, viet nam
Keywords:cellulose content, clonal repeatability, Eucalyptus camaldulensis, E. urophylla, genetic correlation, genotype by environment interaction, heritability, wood basic density.
URN:NBN:urn:nbn:se:slu:epsilon-2955
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-2955
ID Code:2075
Department:(NL, NJ) > Dept. of Plant Biology and Forest Genetics (until 131231)
Deposited By: Kien Nguyen
Deposited On:03 Sep 2009 00:00
Metadata Last Modified:02 Dec 2014 10:16

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