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All Journal HAYATI Journal of Biosciences MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia MEDIA KONSERVASI Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Jurnal Ilmu Lingkungan Indonesian Journal of Applied Sciences BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Ilmu Komputer dan Agri-Informatika Jurnal Penelitian Hutan dan Konservasi Alam Jurnal Penelitian Hasil Hutan JURNAL PEMULIAAN TANAMAN HUTAN JURNAL PERBENIHAN TANAMAN HUTAN AGRIVITA, Journal of Agricultural Science Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) International Journal of Advances in Intelligent Informatics JURNAL BIOLOGI INDONESIA ZOO INDONESIA Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Indonesian Journal of Chemistry Forest and Society Jurnal Ilmu dan Teknologi Kayu Tropis Journal of Sylva Indonesiana Jurnal Penelitian Hasil Hutan Zoo Indonesia JURNAL HUTAN TROPIS Journal Of Sustainability Perspectives Jurnal Komputer Teknologi Informasi Sistem Komputer (JUKTISI) Journal of Sustainability Perspectives Policy Brief Pertanian, Kelautan, dan Biosains Tropika Indonesian Journal of Forestry Research

ISKANDAR ZULKARNAEN SIREGAR

Department Of Silviculture, Faculty Of Forestry, Bogor Agricultural University, Academic Ring Road Campus IPB Dramaga, PO Box 168, Bogor 16680, Indonesia

Author-ID : 381830

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Public Health Social Sciences Veterinary Other

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Rarity Status and Habitat of Shorea laevis and Shorea leprosula in Muara Teweh, Central Kalimantan Sri Wilarso Budi; Iskandar Zulkarnaen Siregar; Ulfah Juniarti Siregar; Andi Sukendro; Prijanto Pamoengkas; Tedi Yunanto
Jurnal Manajemen Hutan Tropika Vol. 18 No. 2 (2012)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1342.647 KB)

Forest exploitation and conversion to other landuse may cause lost of biodiversity, including most important dipterocarp trees species, i.e. Shorea leprosula and Shorea laevis. The objective of this study was to determine the rarity status of the two important shorea species, i.e. S. laevis and S. leprosula, based on IUCN criteria, their habitat characteristics, and their association with other species, as one of the basis for determining their conservation strategy as a part of forest management. This study was conducted in three types of ecosystem (virgin forest, secondary forest, and fragmented forest) in Muara Teweh, Central Kalimantan. Methodology used in this research includes vegetation and tree diversity analysis. Study results showed that both S. laevis and S. leprosula were included within category of “low risk” in the 3 types of ecosystem in the forest area being studied. Habitat characteristics which determined the absence of S. laevis in the virgin forest habitat was the soil permeability which was too low, whereas other soil chemical and physical properties in the three types of ecosystems were relatively similar. Presence of S. laevis were positively associated with species of S. uliginosa, Dialium platysepalum, Dipterocarpus ibmalatus, Palaquium rostatum, Vatica rasak, Adinandra sp., and Memecyclon steenis. On the other hand, S. leprosula were positively correlated with S. kunstleri, Castanopsis sp., Shorea sp., Quercus bennettii, Castanopsis argentea, and D. hasseltii.

UJI KETURUNAN SAUDARA TIRI ( Half - sib ) SENGON ( Paraserianthes falcataria L. Nielsen) DI TAMAN HUTAN BLOK CIKABAYA Ali Mukmin; Iskandar Zulkarnaen Siregar
Jurnal Manajemen Hutan Tropika Vol. 13 No. 1 (2007)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.917 KB)

Analysis of genetic parameters in seedling seed orchard progeny trial of Paraserianthes falcataria at Taman Hutan Blok Cikabayan are very important to decide to continue the breeding program. The analysis was coducted on estimation of individual heritability and genetic correlation between traits. Result of analysis shows that individual heritability for height, diameter and form traits.

Phenotypic and Genetic Diversity Evaluation of Sengon (Falcataria moluccana (Miq.) Barneby & JW Grimes) from Solomon Provenance on Progeny Trial in Cirangsad Experimental Forest, West Java Fifi Gus Dwiyanti; Iskandar Zulkarnaen Siregar; Ulfah Juniarti Siregar
Jurnal Manajemen Hutan Tropika Vol. 27 No. 3 (2021)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7226/jtfm.27.3.174

Initial evaluation of phenotypic variability and genetic diversity was conducted on the progeny test of 2 years-old sengon from Solomon provenance, which derived from nine families of mother tree and were then planted in 4 blocks in the Cirangsad Experimental Forest. Phenotypic assessment on eight traits was conducted on 36 trees using a scoring system, while genetic diversity of 15 selected individuals which represented high and low-score phenotypic traits was analyzed using 5 selected RAPD primers. The result on phenotypic assessment showed that family 3 (57.25 points) has the highest average score of phenotypic quality and family 4 has the lowest average score (7.50 points). Furthermore, genetic analysis showed that the low-scoring sengon population had a greater mean genetic diversity (He = 0.2535) than the high-score population (He = 0.2345). The analysis of molecular variance (AMOVA) revealed a significant genetic differences (p-value < 0.001) among high and low-score populations and the dendrogram of genetic distance revealed clustering of individuals having similar superior phenotypic against those having non-superior, indicating the selection based on phenotypes in this study had succeeded in pooling the good quantitative alleles in the selected population. This evaluation results can be used as a reference in determining the best families to produce superior sengon (from Solomon provenance) offspring in the future that have desired adaptability, productivity, and diversity.

Pengembangan metode penanda genetika molekuler untuk lacak balak (studi kasus pada jati) Iskandar Z. Siregar; Ulfah J. Siregar; Lina Karlinasari; Tedi Yunanto
Jurnal Ilmu Pertanian Indonesia Vol. 13 No. 2 (2008): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.425 KB)

Tracking timber on teak and teak wood products can be conducted using different methods, such as DNA finger printing, chemical composition of the wood, Near Infra Red spectra (NIR) and stable isotopes. Samples were collected from wood material and leaves in Java (9 Forest Management Units district) of Perhutani to determine: i) pattern of genetic variation within and among populations, ii) to determine the protocol for DNA extraction from wood, and iii) to study the feasibility of DNA marker for timber tracking in the field. Results show that: i) genetic variation of cpDNA (PCR-RFLP) is low, while RAPD variation is moderate, ii) there are differences in chemical composition of wood among the Forest Management Units (FMUs) of Perhutani, iii) variation of isotopic carbon and oxygen in Central and East Java were higher than from of West Java, iv) absorbtion intensity of NIR in West Java was higher than for Central and East Java, and iv) testing of DNA marker showed that genetic structure in the forest site is not significantly different from that in log yards, indicating that the timber flow is still according to the procedure. RAPD marker also is able to determine the origin of illegal timber and wood in industry without clear identity. Keywords: genetik marker, teak, timber tracking

PENGEMBANGAN SUMBER BENIH MINDI (Melia azedarach) UNTUK HUTAN RAKYAT DI JAWA BARAT Prijanto Pamoengkas; Iskandar Z. Siregar; Nurheni Wijayanto; . Yulianti; Dida Syamsuwida
Jurnal Ilmu Pertanian Indonesia Vol. 17 No. 1 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (390.421 KB)

Melia azedarach is mostly found in community forests in West Java. One of the factors that affect forest productivity is high quality seed, but seed quality is not easily obtained by farmers. The general objective research is to provide good quality seeds of Mindi. Specific objectives are: 1) Determine the potential and the distribution of genetic resources of Mindi); 2) Determine the reproductive system; 3) ) improve seed technology to develop the seed viability of mindi, and 4) Build the collaborative management of mindi seed source by farmer. Seven populations of mindi plantation in the community forests were chosen for this research. The study was conducted over three years (2009-2011). Biophysical condition such as soil, light, temperature, altitude and humidity affect growth, flowering, fertilization and fruit production of mindi. The flowering cycle was proceeded for 6-7 months. The average value of reproductive success (KR) is 58%. The genetic variation of mindi in community forests in West Java was He = 0.1603-0.1956. The thickness of the seed coat, the high content of lignin and ABA is create a difficulty in seed germination. Prospective populations to be developed for seed sources were proposed namely Sumedang, Wanayasa and Talegong.

PENDUGAAN POTENSI POPULASI DAN EKOLOGI JELUTUNG (Dyera costulata (Miq.) Hook. F) DI HARAPAN RAIN FOREST (HRF-PT REKI) JAMBI Rahila Junika Tanjungsari; Ervizal A.M. Zuhud; Iskandar Z. Siregar
Media Konservasi Vol 21 No 1 (2016): Media Konservasi Vol. 21 No. 1 April 2016
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Jelutung (Dyera costulata) is a native species from Sumatra and Borneo. D. costulata has various benefit, for human and environment. The main use of jelutung is the latex as industrial raw materials. Jelutung population in natural habitat has decreased and the product is no longer available in market. The objectives of this research were (1) to identify population of jelutung in Harapan Rain Forest-PT Restorasi Ekosistem Indonesia (HRF-PT REKI), (2) to analyze habitat characteristics of D. costulata on HRF. The study was conducted in May-June 2015 at HRF-PT REKI, Batanghari District, Jambi. Data were collected by interview and vegetation analysis with sample plot of 2 ha. Result this study showed, D. costulata stand condition in HRF was abnormal. Jelutung tree diameter class is a class at most a diameter of 40 cm - 60 cm by 26 individuals D. costulata can grow in temperature condition 23oC -28oC and soil condition that are very acidic and poor of nutrient. But, species richness around habitat jelutung a relatively high. In conclussion jelutungs of the study could be used to local conservation and management for sustainable used.Keywords: ecology, jelutung, potency

Leaf Morphology Traits of Shorea spp in Ex-Situ KHDTK Haurbentes Henti Rosdayanti; Ulfah Juniarti Siregar; Iskandar Z. Siregar
Media Konservasi Vol 24 No 2 (2019): Media Konservasi Vol. 24 No. 2 Agustus 2019
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Shorea is a genus of the Dipterocarpaceae family which shows high economic and ecological values. Currently, market demand for wood is still met from natural forests that are degrading due to over exploitation. The degraded forests are included in the rehabilitation program that require significant number of planting stocks, mainly from seedlings or wildlings. Correct species identification of planting stocks, particularly wildlings, is an important first step in planting activities and it is relevant with Shorea spp planting stocks due to leaf morphology traits. This study was aimed to examine the traits of leaf morphology of four Shorea species for easy field identification. Samples were taken from five trees for each species. Morphological trait identification was conducted by leaf observation and measurement. The results showed that all four species had the same apex shape. Six of the twelve morphological characteristic of the variable character can influence the morphological characteristics of the leaves, namely the roving leaf, leaf area, leaf length, aspect ratio, form factorand perimeter ratio of diameter. S. leprosula is similar to S. parvifolia, while S. ovalis is similar to S. guiso. Shorea leaf character S. parvifolia differentiated from S. leprosula, while Shorea ovalis similar to Shorea guiso. The LP variable (length from the base of the leaf to the widest point of the leaf) is a variable that can be used as aleaf morphological characteristic of the four Shorea which are compared because each one has a different value. S. ovalis has the highest LP value, followed by S. guiso and S. leprosula, while S. parvifolia has the lowest LP value. Keywords: apex shape, identification, leaf morphology traits, Shorea

KANDUNGAN MINYAK MALAPARI (Pongamia pinnata (L.) Pierre) DARI PULAU JAWA SEBAGAI SUMBER BAHAN BAKU BIODIESEL Aam Aminah; Supriyanto Supriyanto; Iskandar Zulkarnaen Siregar; Ani Suryani
Jurnal Penelitian Hasil Hutan Vol 35, No 4 (2017): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2017.35.4.255-262

Malapari (Pongamia pinnata (L.) Pierre) adalah salah satu bahan baku biodiesel yang paling potensial untuk dikembangkan di Indonesia. Tanaman ini secara alami tersebar mulai dari Sumatera sampai Papua, namun belum diketahui informasi mengenai kandungan minyak dan sifat fisiko-kimia minyak malapari khususnya yang ada di Pulau Jawa. Penelitian ini bertujuan untuk mempelajari komposisi kimia biji malapari, mengidentifikasi komposisi asam lemak dari minyak biji yang dihasilkan dan mengkarakterisasi sifat fisiko-kimia minyaknya. Penentuan komposisi kandungan kimia biji malapari dilakukan dengan analisis proksimat. Analisis sifat fisiko-kimia minyak biji malapari dilakukan dengan metode pengujian ASTM. Hasil penelitian menunjukkan bahwa populasi Batukaras merupakan populasi yang paling baik sebagai sumber bahan baku biodiesel karena mempunyai nilai kadar minyak tertinggi. Keunggulan lain dari populasi Batukaras memiliki nilai berat jenis, viskositas, dan bilangan asam yang terendah. Minyak malapari didominasi oleh asam lemak oleat dan linoleat yang merupakan asam lemak tidak jenuh yang berpotensi untuk biodiesel. Berdasarkan nilai asam lemak (oleat dan linoleat) dan sifat fisiko kimia (berat jenis dan nilai kalor) minyak mentah malapari dari kelima populasi telah memenuhi syarat untuk dijadikan bahan baku biodiesel.

DIFFERENTIALLY EXPRESSED GENES (DEGS) PADA Dryobalanops aromatica YANG DITUMBUHKAN PADA MEDIA GAMBUT DAN TANAH MINERAL Yosie Syadza Kusuma; Fifi Gus Dwiyanti; Deden Derajat Matra; Ulfah Juniarti Siregar; Iskandar Zulkarnaen Siregar
Jurnal Pemuliaan Tanaman Hutan Vol 15, No 2 (2021): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2021.15.2.115-128

Dryobalanops aromatica is a highly economic value resin-producing tree and has been known as an important international trade commodity that is widely used in the perfume, cosmetic, medicine, and wood industries. In natural habitats, this species has been found to grow well on peatland and mineral soils. The information regarding adaptive genes in Indonesian native trees to abiotic stress is still very limited. The research was conducted to analyse the differentially expressed genes (DGEs) that can elucidate the role of several upregulated and down-regulated genes under peat media and mineral soil treatments. DGE analysis was carried out using R software, Bioconductor package 'edgeR'. Using the Benjamini and Hochberg approach to control FDR (FDR 0.05), with a Log2FC 2 and p-value of 0.05, showed 320 contigs were up-regulated and 439 contigs were down-regulated, while 58129 contigs were not significantly expressed. Furthermore, this study also presents an overview of the genes involved in different pathways, such as photosynthesis, carbon and energy metabolism, hormone-related genes, nitrogen metabolism, reactive oxygen species, and transcription factor. This information will be useful in understanding D. aromatica molecular responses to stress condition that may be of use for selecting genotypes in the breeding programs or peatlands restoration

MORFOLOGI , ANATOMI DAN KANDUNGAN KIMIA BENIH MINDI DARI BERBAGAI ASAL BENIH Yulianti Bramasto; Nurheni Wijayanto; Iskandar Zulkarnaen Siregar
Jurnal Perbenihan Tanaman Hutan Vol 3, No 1 (2015): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

Perkecambahan benih mindi (Melia azedarach) masih mengalami kendala, yang terekspresikan dari masih rendahnya daya berkecambah benih, sehingga akan mempengaruhi penyediaan bibit mindi yang berkualitas. Tujuan penelitian ini adalah mengetahui struktur morfologi, anatomi serta kandungan kimia pada benih mindi. Struktur morfologi dan anatomi benih didasarkan pada struktur makroskopis dan mikroskopis, sedangkan kandungan kimia benih adalah lignin, lemak dan Abscisic acid (ABA). Berdasarkan hasil pengujian terhadap struktur anatomi benih mindi, ketebalan endocarp berkisar antara 331,4 –1448,2 µm dan tebal testa berkisar 41,9–148,6 µm, dengan kerapatan sel berkisar 2031-4635 sel per mm2. Benih mindi mengandung ABA cukup tinggi (0,0386- 0,0955 mg/g ) dengan kadar lignin pada kulit benih termasuk kategori sedang yaitu berkisar antara 22,26-26,57%. Keberadaan ABA pada benih dapat menjadi faktor penghambat dalam perkecambahan, demikian pula dengan ketebalan dan kekerasan endocarp yang disebabkan oleh adanya lignin. Oleh karena itu perlu dilakukan delignifikasi untuk dapat meningkatkan daya berkecambah benih mindi.

Co-Authors . Yulianti Aam Aminah Abdul Munif Aditya Nugroho Adzkia, Ulfa Agus Astho Pramono Agus Buono Agus Purwito Agus Wahyudi Alami, Tegar Alfi Hudatul Karomah Ali Mukmin Aminah . Aminuyati Andi Sukendro Andry Indrawan Ani Suryani Anita, Vilda Puji Dini Arida Susilowati Iswanto Arif Satria Arrofaha, Nawwall Atok Subiakto Ayyasy, Yahya Baiquni Rangkuti, Ahmad Basuki Wasis BUDI TJAHJONO Budi Tjahjono Cartealy, Imam Civi Cecep Kusmana Corryanti Corryanti Corryanti Corryanti Dede J Sudrajat Dede J. Sudrajat Dede J. Sudrajat Deden Derajat Matra Detty Sumiyati Dida Syamsuwida Dida Syamsuwida Dien Atin Boritnaban Divi Handoko Dodik Ridho Nurrochmat Edje Djamhuri Endah R Palupi Endah Retno Palupi Erdy Santoso Ervizal A.M. Zuhud Ervizal AMZU Eryna Elfasari Rangkuti Fifi Gus Dwiyanti Fifi Gus Dwiyati Fredisa, Yoga Harisson, Rhett D. Hartati Hartati Hartati, N Sri Henti Hendalastuti R., Henti Hendalastuti Henti Rosdayanti Henti Rosdayanti, Henti IBNUL QAYIM Imam Wahyudi Indrawan, Imam Wahyudi IPB, BPKB Irdika Mansur Irsyad Kamal Ishak Yassir Istomo . Karlisa Priandana Kaswanto, Regan L. Kissinger Kissinger Ko Harada Koichi Kamiya Koichi Kamiya Kosasih, Akhmad Kustiyarini, Nur Fadila KUSUMADEWI SRI YULITA Laswi Irmayanti Laswi Irmayanti, Laswi Latifah K. Darusman Latifah K. Darusman Lina Karlinasari Lutfy Abdulah Majiidu, Muhammad Matra, Deden Derajat Mohamad Rafi Mr. Kissinger Muhammad Majiidu Muhammad Rafi Muttaqin Muharam, Karima Fauziah Murdaningsih Haeruman K. Muttaqin, Muhammad Rafi Muttaqin, Zainal Nasution, Tegar Alami Nelly Anna Nurul Khumaida Nyoto Santoso Prijanto Pamoengkas Putra, Heriansyah Rachmat, Henti Hendalastuti Rahila Junika Tanjungsari Rahman, Mohamad Miftah Rangkuti, Reyhan Abdillah RIKA RAFFIUDIN rima siburian Rina Mardiana Septaningsih, Dewi Anggraini Silalahi, Mangarah Siregar, Ulfa Juniarti Situmorang, Rizki Andista Pandapotan Slamet, Alim Setiawan Sri Wilarso Budi Supatmi Supatmi Supriyanto Supriyanto Supriyanto Supriyanto Suria Darma Tarigan Suryanto Suryanto Suseno Amien Susila, Susila Syaiful Anwar Syamsidah Rahmawati, Syamsidah Tedi Yunanto Tedi Yunanto Ulfah Juniarti Siregar Ulfah, Mariyana Ulfah, Mariyana Utami, Anisa Dwi Wati, Ridha Wijayanto, Nurheni WINDRA PRIAWANDIPUTRA, WINDRA Wisnu Ananta Kusuma Yayat Hidayat Yulianti Bramasto Zainal Muttaqin

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