Judul: Karakterisasi Morfologi dan Pertumbuhan Beberapa Genotipe Ubi Kayu (Manihot esculenta Crantz) Hasil Induksi Mutasi Menggunakan Iradiasi Sinar Gamma
Abstrak: This reseach aims to study the growth and variability of several cassava genotypes through mutation induction irradiation. Stem cutting of cassava were irradiated in PATIR-BATAN and planted in Cikabayan Experimental Field, IPB from May 2012 to April 2013. This research was arranged in randomized completely block design with two factor that was gamma ray irradiation rate. Gamma irradiation rate consisted of five levels i.e. 0, 15, 30, 45, and 60 gray (Gy), second faktor that diferent genotypes consisted of five genotypes i.e. Jame-jame, Ratim, UJ5, Malang 4, and Adira 4. Results showed irradiation resulted in 146 plant death when plant are 2 months after planting. Irradiation treatment resulted in reduced number of stomata and number of tubers several genotype. 15 gray irradiation dose treatment produces larger tubers and plant height than control treatment and 30 gray of radiation dose. Characterization result showed that irradiation treatment resulted in changes in several morphological characters cassava.
Keyword: mutations, morphology, genotypes, characterization, cassava

Judul: Karakterisasi Morfologi dan Pertumbuhan Ubi Kayu ‘Gajah’ Asal Kalimantan Timur Hasil Iradiasi Sinar Gamma
Abstrak: Cassava (Manihot esculenta Crantz.) is one of important food source, therefore it is very important to increase cassava yield and starch content, and decrease HCN content in the tuber through efficient breeding program. High genetic diversity is one requirement in successful breeding program. The objective of this experiment was to increase genetic variability of ‘Gajah’ genotype cassava from East Kalimantan through gamma irradiation. Stem cuttings of cassava were irradiated in PATIR-BATAN and planted in Cikabayan Experimental Field, IPB from December 2012 to June 2013. This research was arranged in randomized completely block design with one factor that was gamma ray irradiation rate. The gamma irradiation rate consisted of five levels i.e. 0, l5, 30, 45, and 60 gray (Gy). The research results showed that the LD20 was 16.04 Gy and the LD50 was 21.49 Gy. Gamma irradiation did not significantly affect the vegetative growth of cassava, but it caused changes in several morphological characters, i.e. pubescence on apical leaves, color of apical leaves, leaves retention, shape of central leaflet, petiole color, number of leaves lobes, and orientation of petiole. One of mutant candidate from 15 Gy-irradiated plants produced 17 tuber per plant, thus it is potentially developed further.
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Judul: Analisis sosial konservasi sumberdaya pesisir dan laut pada kawasan Taman Nasional Laut Kepulauan Seribu
Abstrak: Kepulauan Seribu ditetapkan sebagai Kawasan Taman Nasional Laut Kepulauan Seribu (TNLKS)pada tahun 1984. Di kawasan TNLKS terdapat dua institusi pemerintah (Balai TNLKS) dan institusi lokal masyarakat Kepulauan Seribu (kearifan lokal). Penelitian ini bertujuan untuk mendiskripsiakn pelaksanaan konservasi SDPL oleh Balai TNLKS, menganalisis sistem pengelolaan sumberdaya pesisir dan laut berbasis masyarakat, menganalisis respon nelayan terhadap aturan Balai TNLKS dan konflik-konflik yang menyertainya serta menganalisis resolusi konflik yang terjadi.
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