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Applications of molecular characters to breeding of Eucalyptus urophylla in Vietnam

Quang, Tran Ho (2010). Applications of molecular characters to breeding of Eucalyptus urophylla in Vietnam. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2010:96
ISBN 978-91-576-7541-5
[Doctoral thesis]

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The aim of this study was to investigate how to incorporate molecular genetics into the tree breeding program for E. urophylla. The material was a combined provenance and progeny trial, initially including 144 families from open-pollinated trees of nine provenances. It was selectively thinned in year 2 removing 75% of the trees in each family and again in year 5. The population structure was studied with SSR markers after the second thinning. The inbreeding coefficients (FIS) within provenances ranged from 0.069 to 0.198, relatively low values suggesting that selection at the first thinning favoured heterozygosity. Most of the molecular variation was within provenances in (FST = 0.023). The quantitative differentiation for growth traits (QST) among provenances after the second thinning was low since selection tended to equalize the performance of the provenances. The results support the general strategy of the breeding program to improve objective traits while retaining genetic variation. Wood properties (basic wood density, cellulose and lignin contents) were determined in a group of fast-growing and a group of slow-growing families. The cellulose content of the fast group was significantly higher than that of the slow group (40.0% and 37.1%, respectively) and cellulose content was significantly correlated phenotypically with DBH. High growth rate can be combined with high cellulose content for trees intended for pulping. This conclusion was consistent with the non-significant genetic correlations between growth traits and cellulose content or wood basic density based on larger samples. Expression in scrapes of secondary xylem of genes of cellulose and lignin synthesis were related to wood properties. Cellulose synthase A4 (EuCesA4) expression was significantly correlated with cellulose content. Since EuCesA4 is a potential marker of cellulose content, we sampled 60 trees to investigate the occurrence of polymorphism in the DNA sequence. In a 2 kb sequence through six exons and six introns, the polymorphism density was 23 per kb.

Authors/Creators:Quang, Tran Ho
Title:Applications of molecular characters to breeding of Eucalyptus urophylla in Vietnam
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2010
Number of Pages:58
ALLI. Quang TH, Gyllenstrand N, Jansson G, Griffin R, von Arnold S, Clapham D. Evaluating population structure by neutral markers in a thinned progeny trial of Eucalyptus urophylla. (Manuscript). II. Quang TH, Kien ND, von Arnold S, Jansson G, Thinh HH, Clapham D (2010). Relationship of wood composition to growth traits of selected open-pollinated families of Eucalyptus urophylla from a progeny trial in Vietnam. New Forests. 39: 301-312. III. Kien ND, Quang TH, Harwood C, Clapham D, von Arnold S (2009). Cellulose content as a selection trait in breeding for kraft pulp yield in Eucalyptus urophylla. Ann For Sci 66: 711-718. IV. Quang TH, Hallingbäck H, von Arnold S, Clapham D. Expression of genes of cellulose and lignin synthesis in Eucalyptus urophylla in relation to economic traits. (Manuscript).
Place of Publication:Uppsala
ISBN for printed version:978-91-576-7541-5
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:eucalyptus urophylla, wood, wood properties, cellulose, lignins, wood density, genetic markers, genetic variation, genetic correlation, microsatellites, plant breeding, viet nam
Keywords:Cellulose, CesA, Eucalyptus, Fst, Genetic correlation, Genetic variation, Lignin, Microsatellite, Qst, Wood properties
Permanent URL:
ID Code:629
Department:(NL, NJ) > Dept. of Plant Biology and Forest Genetics (until 131231)
Deposited By: Quang Tran Ho
Deposited On:18 Nov 2010 00:00
Metadata Last Modified:02 Dec 2014 10:06

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