Variasi Genetik Sifat-sifat Kayu Uji Keturunan Acacia Mangium Umur 5 Tahun Di Wonogiri, Jawa Tengah (Genetic Variation of Wood Properties in Progeny Trial of Acacia Mangium on 5 Years Old in Wonogiri, Central Java)

摘要

First generation (F-1) of progeny trial of Acacia mangium originated from Papua New Guinea and Queensland-Australia was established in Wonogiri, Central Java on December 1993. The tree selection within family were carried out base on growth characteristic, whereas the wood property traits were not included. The objective of this research is to find the effect of provenance or family in variation of diameter and wood properties of`A. mangium in the trial in 5 years old. The results showed that mean of wood specific gravity was 0.44 (it was medium catagory) and mean of fiber length was 1.04 mm (it is short fiber category). Variation of heartwood area, wood specific gravity, and moisture content showed significantly differences among provenance or between family within provenance. Individual heritability of diameter and heartwood area were low (h2i=0.03 for diameter and h2i=0.05 for heartwood area), however individual heritability of wood properties were low to high (hi2=0.10-0.56). The result of investigation indicated that trees selection using wood properties should be conducted to improve wood quality in the progeny trial.