Early genetic information of Shorea leprosula miq. Half-sib progeny test in Nanga Nuak, Pt. Sari Bumi Kusuma, Central Kalimatan

Mohammad Na'iem, . and Raharjo, Pamuji and Wardhana, Eka Kusdiandra (2005) Early genetic information of Shorea leprosula miq. Half-sib progeny test in Nanga Nuak, Pt. Sari Bumi Kusuma, Central Kalimatan. [Conference or Proceeding]

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Abstract

Shorea leprosula Miq. commonly called as meranti tembaga is one of the best - known and highest economical value timber in Indonesia. However, this meranti timber are still produced from natural forest. Recently, the government of Indonesia have planned to establish meranti plantation in operational scale in order to reduce the alteration of the tropical forest. To serve genetically improved seed of S. leprosula for commercial plantation, a seedling seed orchard progeny test of this species has been established in PT. Sari Bumi Kusuma, in Central Kalimantan. An open pollinated progeny test of S. leprosula consisted of 31 plus trees collected from Bukit Baka population, central Kalimantan and 50 plus trees collected from Gunung Bunga population, west Kalimantan, were established in February 2003 in PT. Sari Bumi Kusuma, Nanga Nuak, Central Kalimantan. The planting site geographically located at 00o 40’ 58’’ longitude, 112o 16’ 23’’ latitude at the elevation of 240 m above sea level. The trials were laid out in randomized complete block design, 3-tree line plots with 5 replications with a spacing 4 x 6 m. Those two populations were set up separately as a sub line system with 200 m distance one each other. The seedlot performance of progeny test plantation at 2.5 years evaluation indicated that there were significant differences both for height and stem diameter for all seedlots observed and some of them such as seedlot no. 004, 017 and 020 seemed to show good phenotypes in the test location. Estimation of individual heritability value at 2.5 years old measurement for height and stem diameter character was 0.123 and 0.044 for Bukit Baka population and 0.171 and 0.176 for Gunung Bunga population respectively. These were indicated that the genetic factor has not played an important role yet in controlling the growth character compared to environment factor. Continuously evaluation on genetic parameters need to be done in this progeny test plantation in order to achieve important information for other breeding activities of the species in the future.

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