Variation in growth traits and wood density in whitewood (<i>Endospermum medullosum</i>): a major timber species in Vanuatu

Doran, J. C.; Bush, David R.; Page, Tony; Glencross, Kevin S; Sethy, M.; Viji, Ioan

doi:10.1505/146554812804715946

Cited by 13 publications

(24 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The program involving the second-generation Bombua planting reported here is an important basis for the conservation of Vanuatu whitewood, complementing the earlier plantings reported on by Doran et al (2012). However, the overall program is being conducted on a small scale and the security of the genetic resources of this species depends on the ongoing care and maintenance of just a few planted trial sites.…”

Section: Discussionmentioning

confidence: 91%

“…However, the overall program is being conducted on a small scale and the security of the genetic resources of this species depends on the ongoing care and maintenance of just a few planted trial sites. Doran et al (2012) reported that many of the places where wild FGR (forest genetic resources) had been collected for the initial plantings in the 1990s no longer support whitewood populations, meaning that the only remaining repository of the genes represented by these subpopulations is now within the breeding program.…”

Section: Discussionmentioning

confidence: 99%

“…Selection of plus trees also needed to cater for seeding periodicity amongst the females and the dioecious character of the species, as many of the selected trees were non-seed-bearing males. This required the marking of four to seven top-ranked trees within each family, from a maximum of eight to 14 trees per family remaining after thinning (see Doran et al 2012 for details).…”

Section: Trial Site Genetic Materials and Experimental Designmentioning

confidence: 99%

“…and teak (Tectona grandis), that have been over-harvested in the wild, and for which genetic conservation and domestication strategies are now being implemented as a matter of urgency (Koskela et al 2014). In Vanuatu, whitewood has been exploited, to the point of extinction in numerous subpopulations (Vutilolo et al 2008;Doran et al 2012), for its valuable timber, which is utilised locally and exported (Viranamangga et al 2012). Transitioning from wild resources to more sustainable plantations and woodlots is crucial for ensuring an ongoing supply of forest products that also supports livelihoods in Vanuatu.…”

Section: Introductionmentioning

confidence: 99%

“…Their progeny were established in December 1998 -January 1999 in two (one major and one minor) provenance/family trials of whitewood on the Industrial Forestry Plantations (IFP) site near Shark Bay on the east coast of Espiritu Santo. Doran et al (2012) reported the results of a combined assessment of the IFP trials at 11.4 years (c. half rotation age). This study demonstrated considerable island-level and family-level variation in diameter at breast height (DBH) and form: trees with the fastest growth and best form were from Espiritu Santo provenances, whilst the poorest performers were from Maewo island and from Forari on Efate Island.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Variation in early growth in a second-generation whitewood (Endospermum medullosum) progeny trial in Vanuatu

Page

Bush

Sethy

et al. 2017

Australian Forestry

Self Cite

View full text Add to dashboard Cite

Endospermum medullosum (whitewood) is a commercially important plantation and agroforestry timber species in Vanuatu, used locally and for export. Commercial development depends on both increased productivity and genetic resource conservation. A second-generation progeny trial on Espiritu Santo Island was measured at ages 2 and 3 years. Growth traits were of low-to-moderate heritability, varying from 0.13 for height at 2 years, to 0.30 for diameter at breast height (DBH) at 3 years. Genetic correlations between growth and form traits were generally encouraging, with form at 3 years moderately-positively correlated (0.49 to 0.56) with the growth measures at ages 2 and 3 years, and no adverse correlations evident. Families of Espiritu Santo origins were consistently amongst the highest ranked for both growth and form traits, while families of Malekula and Pentecost Island performed poorly. These results are supportive of the recurrent selection and breeding strategy being implemented to deliver economic gains in growth traits. With natural populations severely depleted or extinct, the breeding population constitutes a repository for genetic variation already lost from wild sources. The long-term sustainability of the breeding program will therefore depend on provisions made for both improvement (narrowing of variation) and conservation (broadening of variation) of genetic resources. ARTICLE HISTORY

show abstract

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Trial Site Genetic Materials and Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Variation in early growth in a second-generation whitewood (Endospermum medullosum) progeny trial in Vanuatu

Page

Bush

Sethy

et al. 2017

Australian Forestry

Self Cite

View full text Add to dashboard Cite

show abstract

What is the relevance of smallholders’ agroforestry systems for conserving tropical tree species and genetic diversity in circa situm, in situ and ex situ settings? A review

et al. 2013

View full text Add to dashboard Cite

Variability studies for needle and wood traits of different half sib progenies of Pinus roxburghii Sargent

Bhat

Singh²,

Sankhyan

et al. 2016

Physiol Mol Biol Plants

View full text Add to dashboard Cite

Genetic variability studies for needle and wood traits were carried out for the different half sib progenies of Chir pine, raised in 1985 at the main campus of University. There existed a significant variation for these traits among the different half sib progenies, viz., needle length (18.1-24.6 cm), needle thickness (0.53-0.71 mm), number of stomata per mm of a row (7.3-12.0), specific gravity of wood (0.36-0.46), tracheid length (1.51-1.85) and moisture content of wood (47.76-58.81). This variability was found under genetic control, as all these progenies are growing under same environment, and are of same age. Traits having high heritability and genetic gain like, needle thickness, wood specific gravity, tracheid length and others, indicate high genetic control. This variability can be exploited in tree improvement programs through selection and breeding approaches for development of advanced generations. Correlation studies for different traits at genotypic and phenotypic levels provided the basic knowledge of association to chalk out efficient breeding strategy for higher productivity through indirect selection.

show abstract

Variation in growth traits and wood density in whitewood (Endospermum medullosum): a major timber species in Vanuatu

Cited by 13 publications

References 10 publications

Variation in early growth in a second-generation whitewood (Endospermum medullosum) progeny trial in Vanuatu

Variation in early growth in a second-generation whitewood (Endospermum medullosum) progeny trial in Vanuatu

What is the relevance of smallholders’ agroforestry systems for conserving tropical tree species and genetic diversity in circa situm, in situ and ex situ settings? A review

Variability studies for needle and wood traits of different half sib progenies of Pinus roxburghii Sargent

Contact Info

Product

Resources

About