Genetic gain from breeding Acacia auriculiformis in Vietnam

Pinyopusarerk K., . and Harwood C., . and Thinh H. H., . and Hai P. H., . and Kha L. D., . Genetic gain from breeding Acacia auriculiformis in Vietnam. pp. 313-327. ISSN 0128-1283

Seedlots of Acacia auriculiformis collected from a seedling seed orchard (SSO) and an unpedigreed seed production area (SPA) in northern and central Vietnam were compared with a natural-provenance control and a commercial seedlot from Vietnam. Trials were established on lowland sites in central north-central and northern Vietnam. Four years after planting overall survival was good to excellent (83“91). The SSO and SPA seedlots exhibited significantly (p 0.001) greater height diameter at breast height (dbh) and stem volume per hectare than the natural provenance controls which in turn significantly outperformed the local commercial seed source. Conical stem volume in m3 ha-1 at age four years averaged across the three trials was 27.7 for a select SSO seedlot 23.0 for a select SPA seedlot 22.3 for a routine SSO seedlot 19.2 for the natural provenance control and 12.1 for the commercial seedlot. The SSO and SPA seedlots had significantly (p 0.001) straighter stems and reduced incidence of stem forking than the natural provenance control which was in turn superior to the commercial seedlot. Relative performance of the seedlots at the three trial sites was very similar indicating seedlot-by-environment interaction was of no practical significance. Selected clones of A. auriculiformis included in one trial ranked second in height and diameter growth to the select SSO seedlot and displayed the best stem straightness and axis persistence. The increased dbh values of the SSO and SPA seedlots relative to the natural provenance control were consistent with predictions based on genetic parameters derived from the SSO and selection intensities.

Full text available from: Official URL: http://www.frim.gov.my/v1/JTFSOnline/jtfs/v20n4/31...

Abstract

Seedlots of Acacia auriculiformis collected from a seedling seed orchard (SSO) and an unpedigreed seed production area (SPA) in northern and central Vietnam were compared with a natural-provenance control and a commercial seedlot from Vietnam. Trials were established on lowland sites in central north-central and northern Vietnam. Four years after planting overall survival was good to excellent (83“91). The SSO and SPA seedlots exhibited significantly (p 0.001) greater height diameter at breast height (dbh) and stem volume per hectare than the natural provenance controls which in turn significantly outperformed the local commercial seed source. Conical stem volume in m3 ha-1 at age four years averaged across the three trials was 27.7 for a select SSO seedlot 23.0 for a select SPA seedlot 22.3 for a routine SSO seedlot 19.2 for the natural provenance control and 12.1 for the commercial seedlot. The SSO and SPA seedlots had significantly (p 0.001) straighter stems and reduced incidence of stem forking than the natural provenance control which was in turn superior to the commercial seedlot. Relative performance of the seedlots at the three trial sites was very similar indicating seedlot-by-environment interaction was of no practical significance. Selected clones of A. auriculiformis included in one trial ranked second in height and diameter growth to the select SSO seedlot and displayed the best stem straightness and axis persistence. The increased dbh values of the SSO and SPA seedlots relative to the natural provenance control were consistent with predictions based on genetic parameters derived from the SSO and selection intensities.

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Item Type:	Article
AGROVOC Term:	Acacia auriculiformis
AGROVOC Term:	Seedlings
AGROVOC Term:	Seed orchards
AGROVOC Term:	Seed production
AGROVOC Term:	Planting
AGROVOC Term:	Breast height diameter
AGROVOC Term:	Provenance
AGROVOC Term:	Growth
AGROVOC Term:	Environmental factors
AGROVOC Term:	Stems
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:27
URI:	http://webagris.upm.edu.my/id/eprint/21743

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