Forest and fibre genomics: biotechnology tools for applied tree improvement

Myburg, Alexander Andrew; Bradfield, Jonathan P.; Cowley, E; Creux, Nicky M.; Castro, Minique de; Hatherell, T-L; Mphahlele, Makobatjatji M.; O'Neill, Marja Mirjam; Ranik, Martin; Solomon, Lewis D.; Victor, M; Zhou, Huanqi; Galloway, Glenn; Horsley, Tasmien N.; Jones, N.B.; Stanger, T. K.; Bayley, A.D.; Edwards, NM; Janse, B.J.H.

doi:10.2989/south.for.2008.70.2.1.529

Cited by 5 publications

(2 citation statements)

References 64 publications

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“…In Eucalyptus grandis, six full-length CesA genes were identified by screening a cDNA library using degenerate PCR primers (Ranik and Myburg 2006) and later a seventh gene (EgCesA7) was isolated Myburg et al 2008). Phylogenetic analysis shows six clades of CesA genes in angiosperms with a CesA gene from Eucalyptus in each clade (Ranik and Myburg 2006).…”

Section: Introductionmentioning

confidence: 99%

Expression of genes of cellulose and lignin synthesis in Eucalyptus urophylla and its relation to some economic traits

Quang

Hallingbäck

Gyllenstrand

et al. 2011

Trees

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Genes of cellulose and lignin synthesis are important for tree breeding because their activity greatly affects wood properties as well as general growth. The expression (transcript abundance) of genes of cellulose and lignin synthesis in tangential xylem scrapes at breast height sampled at the end of June (middle of active growing season) was related to wood properties in five fast-growing and six slow-growing families of Eucalyptus urophylla from a combined progeny test and seedling seed orchard grown for 10 years in northern Vietnam. Cellulose synthase A (CesA) genes encoding proteins active in the primary cell wall, EuCesA4 and EuCesA5, were more highly expressed than EuCesA1, EuCesA2 and EuCesA3, encoding genes active in the secondary cell wall. EuCesA4 expression was correlated with that of EuCesA5 (r = 0.49, P = 0.040) and EuCesA5 with EuCesA6 (r = 0.46, P = 0.040). EuCesA4 expression was significantly higher in the fast-growing group and was correlated with cellulose content (r = 0.51, P = 0.011). Over 2 kb of the EuCesA gene was sequenced in 24 trees extending from the 5 0 untranslated region through six exons and six introns and revealed 83 polymorphisms and rapid decay of linkage disequilibrium over 500 bp. EuCesA4 activity in xylem is involved in the genetic control of cellulose content, and the gene may have potential for marker-aided selection.

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Section: Introductionmentioning

confidence: 99%

Expression of genes of cellulose and lignin synthesis in Eucalyptus urophylla and its relation to some economic traits

Quang

Hallingbäck

Gyllenstrand

et al. 2011

Trees

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“…The variation in wood density is caused by short-term, even ''pulse-type'', growth responses in the tree to continually varying external environmental factors (Burgess 2008;Downes et al 2008;Drew et al 2008;Morgan and Barton 2008) and internally controlled genetic factors (Berta et al 2010;Myburg et al 2008;Zobel and Jett 1995). These responses are complex, as wood development is affected by the environment both directly and indirectly via physiological responses in the cambial zone (Larson 1994).…”

Section: Introductionmentioning

confidence: 99%

Short-term growth responses and associated wood density fluctuations in variously irrigated Eucalyptus globulus

Drew

Downes

Evans

2010

Trees

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Cambial growth and wood properties respond to fluctuating environmental conditions. Understanding the nature of these responses is crucial to understanding their cumulative effect on the wood quality characteristics of a forest stand. This paper reports on a study conducted over a period of 3 years in continuously irrigated, alternately irrigated and non-irrigated Eucalyptus globulus, in which changes in wood density occurring in response to shortterm growth responses were examined. The study showed that continuous irrigation led to the production of wood with significantly more homogenous density than was the case in situations, where trees experienced large fluctuations in temporal water availability. Although the trees which were not irrigated had the highest wood density overall, trees in which growth was relatively continuous tended to produce the largest volumes of wood with relatively high density, compared to trees in which periodic growth responses were caused by intermittent irrigation, in which wood density was actually reduced. This was largely due to more growth days in summer under the conditions of higher radiation, and a reduction in the number of growth events leading to the production of disproportionately large amounts of low density wood. Soil water deficits contributed to density variation in all treatments, but the effect of energy limitations became more important in continuously irrigated trees.

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Eucalyptus

Henry¹

2011

Wild Crop Relatives: Genomic and Breeding Resources

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Forest and fibre genomics: biotechnology tools for applied tree improvement

Cited by 5 publications

References 64 publications

Expression of genes of cellulose and lignin synthesis in Eucalyptus urophylla and its relation to some economic traits

Expression of genes of cellulose and lignin synthesis in Eucalyptus urophylla and its relation to some economic traits

Short-term growth responses and associated wood density fluctuations in variously irrigated Eucalyptus globulus

Eucalyptus

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