Judul: Vigor daya simpan dan vigor kekuatan tumbuh benih jagung hibrida (Zea mays L.)
Abstrak: The high demand for corn in Indonesia resulted to increasing of corn seed needed. The research was aimed to study the storability period and vigor of hybrid corn seeds. The study was conducted in two experiment i.e accelarated aging experiment using chemical method with etanol 96% and drought stress experiments on corn seeds vigor using Polyethylene glycol 6000. This experiment was arranged in randomize complete block design (RCBD) in two factors that is15 hybrid corn varieties (Pertiwi-3, Bima Super, NK 33, DK 85, Bionix 09, BISI 18, P 21, BISI 2, BISI 816, DK 95, DK 77, Pertiwi 2, DK 979, NK 6326 dan BISI 222) and level of seed treatment. Four level of etanol 96% soak period i.e. 0,15,30 and 45 minutes was arranged as first experiment for seed storability treatment. Four level of osmotic potential i.e. 0, -1, -1.25 and -1.5 bar was arranged as treatment in seed vigor experiment. Based on germination percentage (DB), velocity of growth (KCT), vigor index (IV), and dry weight of normal seedlings (BKKN) the variety which has high storability period (VDS) are Pertiwi 2 and BISI 816 seed. Through seed vigor experiment, Pertiwi 3, BISI 18, DK 77, DK 85, DK 979 and DK 95 variety elucidated highest result in germination percentage (DB), speed of germination (KCT), vigor index (IV), dry weight of normal seedlings (BKKN) and length of radicles.
Keyword: Bogor Agricultural University (IPB), Polyethylene glycol 6000, etanol 96%, drought stress

Judul: Deteksi Vigor Daya Simpan Benih Padi Gogo (Oryza sativa L.) dengan Metode Pengusangan Cepat
Abstrak: Storability is an important seed character indicating how long the seed could maintain the viability. Accelerated aging with physical or chemical treatments are methods for detecting seed vigor especially storability (storability vigor, VDS). The aims of the research were: 1) to find out a simple accelerated aging method suitable for testing storability vigor of upland rice seeds, 2) to identify upland rice genotypes with high storability vigor. Experiments were conducted in the Seed Science and Technology Laboratory, Plant Analysis and Chromatography Laboratory, Soil Chemical Laboratory, Bogor Agricultural University, from January 2011 to October 2011. Three methods of accelerated aging, 45oC and 100% RH, 96% ethanol vapour, and soaking in 96% liquid ethanol, were applied to seeds of 5 rice varieties i.e. Situ Patenggang, Limboto, Inpago 4, Inpago 5, Inpago 6. The most suitable method was used to evaluate the storability vigor of 26 upland rice genotype seeds. Result of the experiment showed that accelerated aging by soaking seed in liquid ethanol 96% for 3 minutes and 24 seconds decreased the average germination percentage from 94.67% to 84.13% and seedling growth rate from 17.97%/etmal to 15.11%/etmal. However, biochemical analysis showed that there were no significant differences between the treated and untreated seed for electroconductivity, leakage of protein, sugar and phosphorous variables. The ethanol treatment might disturb fungtional proteins including enzymes but not the cell membrane. Evaluation of 26 upland rice genotypes showed that breeding lines B12154D-MR-10, B1215D-MR-11, and B11602-MR- 1-52 performed high storability vigor.
Keyword: 

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
Keyword: