－ 571 － 1. INTRODUCTION Eucalyptus has been recognized as an ex- tensively-planted species for pulp production in numerous countries. In particular, Eucalyptus pellita has been posited as a primary raw mate- rial in Indonesia due to its fast growth. Besides, other desirable characteristics of E. pellita in- clude a considerably good environmental adapt- ability, a straight stem growth, a single and J. Korean Wood Sci. Technol. 2016, 44(4): 571~588 pISSN: 1017-0715 eISSN: 2233-7180 http://dx.doi.org/DOI :10.5658/WOOD.2016.44.4.571 Original Article Chemical Properties and Fiber Dimension of Eucalyptus pellita from The 2nd Generation of Progeny Tests in Pelaihari, South Borneo, Indonesia 1 Ganis Lukmandaru 2,† ⋅Umi Farah Zumaini 2 ⋅Djoko Soeprijadi 2 ⋅ Widyanto Dwi Nugroho 2 ⋅Mudji Susanto 3 ABSTRACT Eucalyptus pellita F. Muell is one of pulp woods that is being developed through breeding plantation pro- grams in Indonesia. The research aimed at exploring the chemical and morphological characteristics of fiber, and to determine the rank of plus trees from 4 provenances based on the suitability for pulps. The materials in- cluded the plus trees of E. pellita (9 years) from the 2nd generation of progeny tests in Pelaihari, South Borneo. Wood properties under investigation included the chemical properties and morphological fiber characteristics (fiber dimensions and its derived properties). In the present study, data were analyzed using descriptive statistic, Analytic Hierarchy Process (AHP) and Pearson’s correlation. Results showed that the chemical properties of E. pellita, i.e. the contents of ethanol-toluene extractives, hot water soluble extractives, holocellulose, alpha- celullose, and lignin were 3.08 ± 1.00%, 1.41 ± 0.38%, 75.26 ± 2.58%, 49.02 ± 2.88%, and 29.49 ± 1.86%, respectively. The average values of wood fiber morphology were 1.02 ± 0.08 mm (fiber length), 13.25 ± 1.64 µm (fiber diameter), of 6.94 ± 1.70 µm (lumen diameter), 3.15 ± 0.52 µm (fiber wall thickness), 0.97 ± 0.30 (Runkel ratio), 0.57 ± 0.10 (Luce’s shape factor), 78.21 ± 10.34 (slenderness ratio) and 130.91 ± 33.77 × 10 3 µm 3 (solids factor). The AHP scoring rank indicated that the best individuals were 28.4.3.28 (Kiriwo Utara), 12.1.5.28 (North Kiriwo), 19.11.5.45 (Serisa Village), 3.8.4.9 (South Kiriwo), and 6.6.3.15 (South Kiriwo). Pearson cor- relation analysis showed significant correlations between the levels of fiber length with alpha-cellulose content (r = 0.39) as well as the fiber length with ethanol-toluene extractive contents (r = -0.41). Keywords : Eucalyptus pellita, chemical properties, fiber morphology, Analytic Hierarchy Process, progeny test 1 Date Received December 11, 2015, Date Accepted July 11, 2016 2 Faculty of Forestry, Universitas Gadjah Mada, Sleman 55281, Indonesia 3 Centre for Forest Biotechnology and Tree Improvement Research, Sleman 55582, Indonesia † Corresponding author: Ganis Lukmandaru (email: ganisarema@lycos.com)