Eucalypts

Myburg, Alexander Andrew; Potts, Brad M.; Marques, Cristina; Kirst, Matias; Gion, Jean‐Marc; Grattapaglia, Dário; Grima-Pettenatti, Jacqueline

doi:10.1007/978-3-540-34541-1_4

Cited by 41 publications

(40 citation statements)

References 236 publications

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“…Such studies will provide a basis for validating existing QTL, and locating additional QTL, particularly those of relatively small effect (Beavis 1998). These studies will allow a reduction of confidence intervals associated with QTL to relatively small regions of the genome, which we can use to interrogate the genome sequence of E. grandis (when it becomes available in the near future; www.eucagen.org), in order to identify positional candidate genes (Myburg et al 2007). Such positional candidates can then be used in association studies, to verify that they underlie phenotypic variation in the traits in question, across a greater range of genetic backgrounds and environments (Myburg et al 2007;Grattapaglia and Kirst 2008).…”

Section: Qtl Homologymentioning

confidence: 99%

“…Nonetheless, QTL studies provide the basis for identifying important genomic regions which can then be further studied using techniques such as map-based cloning and functional analysis, as well as providing candidate genes for association studies (Thumma et al 2005;Myburg et al 2007). These techniques are more likely to provide information directly applicable to breeding.…”

Section: Qtl Homologymentioning

confidence: 99%

“…An important issue in association studies is the selection of appropriate candidate genes. The co-location of QTL and candidate genes, particularly across multiple pedigrees, can be useful to reduce the many potential candidate genes for association studies (Myburg et al 2007;Grattapaglia and Kirst 2008).…”

Section: Introductionmentioning

confidence: 99%

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QTL influencing growth and wood properties in Eucalyptus globulus

Freeman

Whittock

Potts

et al. 2009

Tree Genetics & Genomes

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Regions of the genome affecting physical and chemical wood properties (quantitative trait loci (QTL)), as well as growth, were identified using a clonally replicated, outbred F 2 family (112 genotypes, each with two ramets) of Eucalyptus globulus, planted in a field trial in north-west Tasmania. Traits studied were growth (assessed by stem diameter), wood density, cellulose content, pulp yield and lignin content. These traits are important in breeding for pulpwood, and will be important in breeding for carbon sequestration and biofuel production. Between one and four QTL were located for each trait, with each QTL explaining between 4% and 12% of the phenotypic variation. Several QTL for chemical wood properties were co-located, consistent with their high phenotypic correlations, and may reflect pleiotropic effects of the same genes. In contrast, QTL for density and lignin content with overlapping confidence intervals were considered to be due to independent genes, since the QTL effects were inherited from different parents. The inclusion of fully informative microsatellites on the linkage map allowed the determination of homology at the linkage group level between QTL and candidate genes in different pedigrees of E. globulus and different eucalypt species. None of the candidate genes mapped in comparable studies co-located with our major QTL for wood chemical properties, arguing that there are important candidate genes yet to be discovered.

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Section: Qtl Homologymentioning

confidence: 99%

Section: Qtl Homologymentioning

confidence: 99%

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QTL influencing growth and wood properties in Eucalyptus globulus

Freeman

Whittock

Potts

et al. 2009

Tree Genetics & Genomes

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“…Advanced generation breeding in combination with seedling and clonal seed orchards can continue making gains in these traits, but dramatic improvements are possible with clonal selection and testing. For example, interspecific hybridization and genetic modification, using gene mapping and genomic selection, could produce cloning candidates [82].…”

Section: Research Needsmentioning

confidence: 99%

History and Status ofEucalyptusImprovement in Florida

Rockwood

2012

International Journal of Forestry Research

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Cooperative formed to provide additional support emphasized E. grandis, E. robusta, E. camaldulensis, and E. tereticornis and developed cultural practices for commercial plantations in southern Florida. In 1978, this cooperative united with the Hardwood Research Cooperative at North Carolina State University until 1985 when the 14-year effort ended after three severe freezes from 1983 to 1985. Eucalyptus planting and research were continued with a Florida-wide focus by the University of Florida and collaborators starting in 1980. The collective accomplishments in terms of genetic resources and commercial planting are summarized. For example, fast-growing, freeze-resilient E. grandis seedlings are produced by advanced generation seed orchards, five E. grandis cultivars are commercially available, as are E. amplifolia and Corymbia torelliana seeds. Genetic improvement of these and other species is ongoing due to beneficial collaborations. Short Rotation Woody Crop systems are promising for increasing productivity and extending uses beyond conventional pulpwood to applications such as windbreaks, dendroremediation, and energy wood.

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“…E. grandis is a species native to tropical and subtropical regions that exhibits rapid growth, but produces a low-density wood. On the other hand, E. globulus is a species from temperate climates that produces a high-density wood, but exhibits slow growth when cultivated in tropical regions (Eldridge et al, 1993;Bernard, 2003;Myburg et al, 2007). Considering the economic and ecological relevance of the genus Eucalyptus, understanding the cellular function of stress-inducible genes is of central interest for biotechnological applications in forestry.…”

Section: Introductionmentioning

confidence: 99%

Phosphate-induced-1 gene from Eucalyptus (EgPHI-1) enhances osmotic stress tolerance in transgenic tobacco

Sousa¹,

Assis²,

Pirovani³

et al. 2014

Genet. Mol. Res.

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ABSTRACT. Environmental stresses such as drought, freezing, and high salinity induce osmotic stress in plant cells. The plant response to osmotic stress involves a number of physiological and developmental changes, which are made possible, in part, by the modulation of the expression of specific genes. Phosphate-induced-1 gene (PHI-1) was first isolated from phosphate-treated phosphate-starved tobacco cell cultures as a stress-inducible gene, which is presumably related to intracellular pH maintenance; however, the role of the PHI-1 gene product has not yet been clarified. A gene encoding a predicted protein with high similarity to tobacco PHI-1, named EgPHI-1, was previously identified in Eucalyptus by comparative transcriptome analysis of xylem cells from species of contrasting phenotypes for wood quality and growth traits. Here, we show that the overexpression of EgPHI-1 in transgenic tobacco enhances tolerance to osmotic stress. In comparison with wild-type plants, EgPHI-1 transgenic plants showed a significant increase in root length and biomass dry weight under NaCl-, polyethylene glycol, and mannitol-induced osmotic stresses. The enhanced stress tolerance of transgenic plants was correlated with increased endogenous protein levels of the molecular chaperone binding protein BiP, which in turn was correlated with the EgPHI-1 expression level in the different transgenic lines. These results provide evidence about the involvement of EgPHI-1 in osmotic stress tolerance via modulation of BiP expression, and pave the way for its future use as a candidate gene for engineering tolerance to environmental stresses in crop plants.

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Eucalypts

Cited by 41 publications

References 236 publications

QTL influencing growth and wood properties in Eucalyptus globulus

QTL influencing growth and wood properties in Eucalyptus globulus

History and Status ofEucalyptusImprovement in Florida

Phosphate-induced-1 gene from Eucalyptus (EgPHI-1) enhances osmotic stress tolerance in transgenic tobacco

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