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The Possibility of Tree Selection and Breeding for Genetic Improvement of Wood Properties of Gmelina arborea

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Wood samples of Gmelina arborea were collected from Nigerian plantations. The wood density was measured with an X-ray densitometer. Fiber length was measured with a modified map measurer. Fiber proportion was determined with a modification of Ladell's (1959) randomized dot technique. Considerable between-tree differences were observed in wood density, fiber length, fiber proportion, and sizes of trees of the same age, planted at the same spacing within the same environment. The magnitude of within-tree variations in these wood properties was different in trees within the same plot. Some individual trees combined comparatively high density, fiber length, and fiber proportion with fast growth rate and uniform wood. There was sufficient phenotypic variation to encourage genetic improvement of the wood properties and growth rate by selecting and breeding trees with higher values of these traits. Tree selection should be based on a preliminary screening for tree form and volume growth followed by a second selection for the desired wood properties. Forest Sci. 30:275-283.
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Keywords: Density; diameter; fiber length; height

Document Type: Journal Article

Affiliations: Department of Forest Resources Management, University of Ibadan, Ibadan, Nigeria

Publication date: 1984-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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