Forest Genetics In Relation To Wood Quality

In the consideration of wood quality from the anatomical viewpoint, the interest lies in fiber length in proportions of springwood and summerwood, which in turn influence density; this may be high or low depending on the intended or prevailing use. High density is desired for great mechanical strength and high pulp yields on a cubic foot and on an acre basis. Shrinkage, warping, and other properties of wood affecting its satisfactory use are related to density and anatomical structure in one way or another. Appearance or figure displayed by growth rings in wood is another feature eagerly sought for special uses. In many cases, therefore, the objectives of tree breeding need to be two- or even threefold. The main Object of tree breeding, according to some popular ideas, is to produce trees of very rapid growth. This at first appears to be a most worthy objective. If trees can be developed that will reach merchantable sizes in a small fraction of the time now required, it will be a great advantage to the timber grower. However, if for one reason or another, the wood produced from this rapid growth proves unsuitable for its intended use, then the user will be at a great disadvantage.

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Author(s): Benson H. Paul