Variations in growth and morphological characteristics of Casuarina junghuhniana provenances grown in Thailand

Williams E. R., . and Pinyopusarerk K., . and Luangviriyasaeng V., . and Pitpreecha K., . Variations in growth and morphological characteristics of Casuarina junghuhniana provenances grown in Thailand. pp. 575-587. ISSN 0128-1283

Variation in growth stem form and branching characteristics was assessed in a 48-month-old provenance trial of Casuarina junghuhniana planted in Kanchanaburi Thailand. The trial compared 28 seed sources from the natural distribution of the species in Indonesia planted stands from Kenya Tanzania and Australia and a local commercial hybrid clone of C. junghuhniana C. equisetifolia. The following characteristics were assessed: height and diameter growth; axis persistence; stem straightness; density thickness and angle of permanent branches; and length thickness and stiffness of branchlets. There were significant differences between seed sources in most of the characteristics assessed. Principal component analysis suggested a pattern of geographic variation among natural provenances from Indonesia with Java Timor and Wetar forming a group separated from Lombok and most seedlots from Bali. In general seed sources from low altitudes grew faster than those from high altitudes. Natural provenances from Bali and land races from Kenya were very variable in growth rate with some being among the slowest growing and some among the fastest growing. Provenances from Bali also showed considerable variation within its group in stem form and branching habit. Selection of suitable provenances to optimize plantation productivity is feasible.

Full text available from: Official URL: http://www.frim.gov.my/v1/JTFSOnline/jtfs/v17n4/57...

Abstract

Variation in growth stem form and branching characteristics was assessed in a 48-month-old provenance trial of Casuarina junghuhniana planted in Kanchanaburi Thailand. The trial compared 28 seed sources from the natural distribution of the species in Indonesia planted stands from Kenya Tanzania and Australia and a local commercial hybrid clone of C. junghuhniana C. equisetifolia. The following characteristics were assessed: height and diameter growth; axis persistence; stem straightness; density thickness and angle of permanent branches; and length thickness and stiffness of branchlets. There were significant differences between seed sources in most of the characteristics assessed. Principal component analysis suggested a pattern of geographic variation among natural provenances from Indonesia with Java Timor and Wetar forming a group separated from Lombok and most seedlots from Bali. In general seed sources from low altitudes grew faster than those from high altitudes. Natural provenances from Bali and land races from Kenya were very variable in growth rate with some being among the slowest growing and some among the fastest growing. Provenances from Bali also showed considerable variation within its group in stem form and branching habit. Selection of suitable provenances to optimize plantation productivity is feasible.

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Item Type:	Article
AGROVOC Term:	Casuarina
AGROVOC Term:	Hybrids
AGROVOC Term:	Density
AGROVOC Term:	Branching
AGROVOC Term:	Habitats
AGROVOC Term:	Planting
AGROVOC Term:	Cutting
AGROVOC Term:	Sandy soils
AGROVOC Term:	Silty soils
AGROVOC Term:	Dry season
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:27
URI:	http://webagris.upm.edu.my/id/eprint/22171

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