Scientific paper

Genetic Improvement of Timber Yield and Wood Quality in Eucalyptus Grandis (Hill) Maiden

Published in: South African Forestry Journal
Volume 153, issue 1, 1990 , pages: 1–11
DOI: 10.1080/00382167.1990.9629025
Author(s): G. van WykDivision of Forest Science and Technology,


Results of a partial diallel progeny test of Eucalyptus grandis assessed at ages 5, 36, 60 and 105 months are presented. Large genetic variations among full-sib families were found for all traits studied, e.g. the mean tree volume per family at 105 months varied from 0,226 m3 to 1,325 m3. Estimates of additive genetic variance (σ2 a) for volume production was slightly less than dominance variance (σ2 d) but for stem and crown form, and for taper σ2 a clearly exceeded σ2 d. Estimates of individual tree heritabilities were moderately high, varying from 0,28 to 0,54. Reciprocal effects were not significant.

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