Judul: Evaluasi Keragaman Genetik Kapulasan (Nephelium Ramboutan-Ake (Labill.) Leenh) Di Bogor, Jawa Barat Berdasarkan Marka Mikrosatelit
Abstrak: Kapulasan (Nephelium ramboutan-ake (Labill.) Leenh) merupakan tanaman yang mirip dengan rambutan rapiah (Nephelium lappaceum) dengan buah berbentuk bundar telur, cita rasa manis dan sedikit asam tetapi memiliki kulit buah yang tebal. Keanekaragaman kapulasan di pulau Jawa khususnya di Bogor belum diketahui sehingga perlu dilakukan evaluasi guna pengembangan jenis ini di masa depan. Tujuan penelitian ini adalah menganalisis keragaman genetik kapulasan di Bogor dengan marka mikrosatelit. Sejumlah 63 individu dari 10 populasi kapulasan diisolasi menggunakan metode CTAB lalu diamplifikasi menggunakan primer LMLY6 (GA)9(CA)2(GA)4 dan LMLY12 (CT)11. Hasil amplifikasi DNA divisualisasi dan disusun dalam matriks data biner lalu dianalisis menggunakan software GenAlex. Hasil analisis menggunakan GenAlex menunjukkan tingkat variasi genetik tertinggi ditemukan di Kecamatan Bogor Utara (He=0.313). Variasi genetik dalam populasi (61%) lebih tinggi dibandingkan dengan antar populasi (39%). Dendrogram kapulasan dikonstruksikan dengan metode Unweighted Pair Group Method with Arithmatic Mean (UPGMA) pada software NTSYS-pc ver 2.1. Nilai kesamaan seluruh sampel sebesar 52-100% dengan seluruh sampel tersebar dalam kelompok yang tidak mengikuti asal populasinya, namun pengelompokan kapulasan ditentukan oleh asal-usul individu kapulasan dalam populasi.
Keyword: Bogor, keragaman genetik, Nephelium ramboutan-ake, mikrosatelit

Judul: Keragaman Genetik Kerabat Rambutan Liar (Nephelium spp.) di Kabupaten Sanggau, Kalimantan Barat berdasarkan Marka SSR dan ISSR.
Abstrak: Wild rambutans (Nephelium spp.) are members of Sapindaceae that produce edible fruit. This study aimed to determine the genetic diversity of wild rambutan from district Sanggau, West Kalimantan based on SSR and ISSR markers. Plant materials were colected from five subdistricts, Bonti, Jangkang, Parindu, Mukok and Kapuas, district Sanggau, West Kalimantan. There were four species and five varieties of wild rambutans in West Kalimantan, namely N. cuspidatum, N. lappaceum, N. rubescens, and N. uncinatum. The genetic diversity of wild rambutans in West Kalimantan is high. The highest genetic diversity based on SSR markers was found in Jangkang (He=0,27) and the highest genetic diversity based on ISSR was found in Bonti (He=0,18). Cluster analysis using Simple Matching (SM) index and UPGMA method based on SSR and ISSR showed that there were high similarity among species of wild rambutans in district Sanggau, West Kalimantan with similarity index ranged 0,5 – 1,0.
Keyword: Bogor Agricultural University (IPB), wild rambutan, SSR, Nephelium, ISSR, Genetic diversity

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4