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Teguh Setyaji

Balai Besar Penelitian dan Pengembangan Bioteknologi dan Pemuliaan Tanaman Hutan Yogyakarta

Author-ID : 2642351

Agriculture, Biological Sciences & Forestry

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PENGARUH SELEKSI TERHADAP PEROLEHAN GENETIK PADA UJI KETURUNAN GENERASI PERTAMA (F-1) JABON MERAH (Anthocephalus macrophyllus (Roxb.) Havil) DI WONOGIRI Surip Surip; Sapto Indrioko; Arif Nirsatmanto; Teguh Setyaji
Jurnal Pemuliaan Tanaman Hutan Vol 11, No 1 (2017): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Selection is a fundamental process in the establishment of a progeny trial that will be converted into a seedling seed orchard. In present study, selection practiced in first-generation progeny trial of jabon merah (Anthocephalus macrophyllus Roxb. Havil.) was observed. The study was aimed to find out a criteria selection accompanied with the effective coefficient weight for predicting genetic gain in the first-generation progeny trial of jabon merah. The trial was established in Wonogiri which was laid out in randomized complete block design (RCBD) using 55 families, 4 replications, 4 tree-plot with a spacing of 4 x 2 meter. Measurement was conducted at 40 months after planting covering tree height, diameter at breast height, stem straightness, stem volume. First within-plot selection by culling 2 poorer trees within each plot was practiced at 46 months age. Selection differential from within-plot selection was used to derive coefficient weight which was then applied to predict genetic gain. Results of study showed that selection differential from first within-plot selection were positive for all measured traits. Stem volume was observed as highest priority trait with coefficient weight for each trait were -0.0863 (height), 0.1426 (diameter), 0.2195 (stem straightness), 2.3025 (stem volume). Prediction of genetic gain from within-plot selection were 3,50% (height), 3.58% (diamater), 3.41% (stem straightness), 7.40% (stem volume). While the gain from family selection were 2.80%, 3.75%, 3.54%, 7.10% for height, diamater, stem straightness, stem volume, respectively.

VOLUME TEGAKAN Acacia mangium PADA UJI PEROLEHAN GENETIK DENGAN KERAPATAN TEGAKAN TINGGI Dwi Kartikaningtyas; Teguh Setyaji; Arif Nirsatmanto
Jurnal Pemuliaan Tanaman Hutan Vol 11, No 2 (2017): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

High initial stand density is commonly practiced in forest plantations subjected to produce high quality logs through successive thinnings. In this study, genetically improved seed of Acacia mangium was verified in genetic gain trial using high initial stand density. The trial was established in Jonggol, West Java and laid out in randomized complete block design with high initial stand density of 2500 trees/ha or in spacing of 2 x 2 m. The improved seeds tested in the trial were collected from four seedling seed orchards (SSOs). As a control, unimproved seeds from seed production area (SPA) were also planted together in the trial. The assessment of stand volume productivity was periodically conducted at two, three and four years of age. The results of study showed that the improved seeds from the four SSOs out performed the unimproved one. However, the significant difference among the seed sources was initially found at the four years of age. The average stand volumes of improved seed were 58.56m3/ha, 94.87m3/ha and 163.8m3/ha for two, three, and four years of age, respectively. The superiority of improved seed over the unimproved one ranged from 23%-36% (two years), 6%-30% (three years) and 2%-22% (four years). The four SSOs showed different behaviours in response to high stand density. Improved seed from SSOs with higher selection intensity was likely to be more tolerant to high stand density.

EVALUASI PRODUKSI BENIH PADA KEBUN BENIH HIBRID ACACIA (Acacia mangium x Acacia auriculiformis) DI WONOGIRI, JAWA TENGAH Sri Sunarti; Valerianus Devi Adyantara; Suharyanto Suharyanto; Teguh Setyaji; Arif Nirsatmanto
Jurnal Pemuliaan Tanaman Hutan Vol 10, No 1 (2016): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Research for developing Acacia hybrid (Acacia mangium x Acacia auriculiformis) breeding strategy through establishing hybrid seed orchard (HSO) has been started by BBPPBPTH. Two hectares of HSO was established in Wonogiri, Central Java to produce the Acacia hybrid seed. The orchard was laid out using an alternating rows design among the two pure parent species with spacing of 1 m x 3 m: 1 m within the species and 3 m between the species. The purpose of this study is to evaluate flowering synchronization and seed production in first year flowering session of four years age mother trees in the HSO. The unit area of observation was set up in 0.2 ha within the HSO. During the first flowering session, 100 mother trees (31%) were observed showing synchronized flowering time among the two parents species: 50 mother trees for Acacia mangium and 50 mother trees for A. auriculiformis. Seed production was still low in which only 38 out of 50 trees of A. mangium mother trees produced seed, whereas selected A. auriculiformis mother trees did not produce seed. The average viability of the collected seed was moderately low at 59.2%. Subsequent verification through DNA marker using SCAR and SSR revealed less than 1% of the collected seed were identified as true Acacia hybrid.

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